SERVER-57003: Generate resmoke tasks at build variant granularity

(cherry picked from commit f7af7fe8600b5245bdfefd03081948a7525d39f4)

26 files changed, 1395 insertions, 1324 deletions

diff --git a/buildscripts/burn_in_tests_multiversion.py b/buildscripts/burn_in_tests_multiversion.py
index 18891b90b6c..5713c0309df 100644
--- a/buildscripts/burn_in_tests_multiversion.py
+++ b/buildscripts/burn_in_tests_multiversion.py
@@ -13,8 +13,6 @@ import structlog
 from structlog.stdlib import LoggerFactory
 from evergreen.api import EvergreenApi, RetryingEvergreenApi
 
-import buildscripts.evergreen_gen_multiversion_tests as gen_multiversion
-import buildscripts.evergreen_generate_resmoke_tasks as gen_resmoke
 from buildscripts.burn_in_tests import EVERGREEN_FILE, \
     DEFAULT_REPO_LOCATIONS, create_tests_by_task, TaskInfo
 from buildscripts.ciconfig.evergreen import parse_evergreen_file, EvergreenProjectConfig
@@ -36,10 +34,9 @@ from buildscripts.util.cmdutils import enable_logging
 structlog.configure(logger_factory=LoggerFactory())
 LOGGER = structlog.getLogger(__name__)
 
-MULTIVERSION_CONFIG_KEY = gen_multiversion.MULTIVERSION_CONFIG_KEY
-MULTIVERSION_PASSTHROUGH_TAG = gen_multiversion.PASSTHROUGH_TAG
-RANDOM_MULTIVERSION_REPLSETS_TAG = gen_multiversion.RANDOM_REPLSETS_TAG
-BURN_IN_MULTIVERSION_TASK = gen_multiversion.BURN_IN_TASK
+MULTIVERSION_CONFIG_KEY = "use_in_multiversion"
+MULTIVERSION_PASSTHROUGH_TAG = "multiversion_passthrough"
+BURN_IN_MULTIVERSION_TASK = "burn_in_tests_multiversion"
 DEFAULT_CONFIG_DIR = "generated_resmoke_config"
 DEFAULT_TEST_SUITE_DIR = os.path.join("buildscripts", "resmokeconfig", "suites")
 
@@ -283,8 +280,7 @@ def main(build_variant, run_build_variant, distro, project, generate_tasks_file,
         binder.bind(EvergreenProjectConfig, evg_conf)
         binder.bind(GenTaskOptions, gen_task_options)
         binder.bind(EvergreenApi, evg_api)
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(gen_resmoke.GENERATE_CONFIG_FILE))
+        binder.bind(GenerationConfiguration, GenerationConfiguration.from_yaml_file())
         binder.bind(ResmokeProxyConfig,
                     ResmokeProxyConfig(resmoke_suite_dir=DEFAULT_TEST_SUITE_DIR))
         binder.bind(EvergreenFileChangeDetector, EvergreenFileChangeDetector(task_id, evg_api))
diff --git a/buildscripts/ciconfig/evergreen.py b/buildscripts/ciconfig/evergreen.py
index 877acf42026..8d96bd03055 100644
--- a/buildscripts/ciconfig/evergreen.py
+++ b/buildscripts/ciconfig/evergreen.py
@@ -148,6 +148,15 @@ class Task(object):
         """Return True if 'generate fuzzer tasks' command is found."""
         return self.generate_fuzzer_tasks_command() is not None
 
+    def generate_implicit_multiversion_command(self):
+        """Return the 'generate implicit multiversion tasks' command if found, or None."""
+        func = self.find_func_command("generate implicit multiversion tasks")
+        return func
+
+    def is_generate_implicit_multiversion_task(self) -> bool:
+        """Return True if 'generate implicit multiverion tasks' command is found."""
+        return self.generate_implicit_multiversion_command() is not None
+
     @property
     def run_tests_command(self):
         """Return the 'run tests' command if found, or None."""
diff --git a/buildscripts/evergreen_activate_gen_tasks.py b/buildscripts/evergreen_activate_gen_tasks.py
new file mode 100755
index 00000000000..e42395b5a13
--- /dev/null
+++ b/buildscripts/evergreen_activate_gen_tasks.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python3
+"""Activate an evergreen task in the existing build."""
+import os
+import sys
+
+import click
+import structlog
+from pydantic.main import BaseModel
+from evergreen.api import RetryingEvergreenApi, EvergreenApi
+
+# Get relative imports to work when the package is not installed on the PYTHONPATH.
+if __name__ == "__main__" and __package__ is None:
+    sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+# pylint: disable=wrong-import-position
+from buildscripts.util.cmdutils import enable_logging
+from buildscripts.util.fileops import read_yaml_file
+from buildscripts.util.taskname import remove_gen_suffix
+# pylint: enable=wrong-import-position
+
+LOGGER = structlog.getLogger(__name__)
+
+EVG_CONFIG_FILE = "./.evergreen.yml"
+
+
+class EvgExpansions(BaseModel):
+    """
+    Evergreen expansions file contents.
+
+    build_id: ID of build being run.
+    task_name: Name of task creating the generated configuration.
+    """
+
+    build_id: str
+    task_name: str
+
+    @classmethod
+    def from_yaml_file(cls, path: str) -> "EvgExpansions":
+        """Read the generation configuration from the given file."""
+        return cls(**read_yaml_file(path))
+
+    @property
+    def task(self) -> str:
+        """Get the task being generated."""
+        return remove_gen_suffix(self.task_name)
+
+
+def activate_task(build_id: str, task_name: str, evg_api: EvergreenApi) -> None:
+    """
+    Activate the given task in the specified build.
+
+    :param build_id: Build to activate task in.
+    :param task_name: Name of task to activate.
+    :param evg_api: Evergreen API client.
+    """
+    build = evg_api.build_by_id(build_id)
+    task_list = build.get_tasks()
+    for task in task_list:
+        if task.display_name == task_name:
+            LOGGER.info("Activating task", task_id=task.task_id, task_name=task.display_name)
+            evg_api.configure_task(task.task_id, activated=True)
+
+
+@click.command()
+@click.option("--expansion-file", type=str, required=True,
+              help="Location of expansions file generated by evergreen.")
+@click.option("--evergreen-config", type=str, default=EVG_CONFIG_FILE,
+              help="Location of evergreen configuration file.")
+@click.option("--verbose", is_flag=True, default=False, help="Enable verbose logging.")
+def main(expansion_file: str, evergreen_config: str, verbose: bool) -> None:
+    """
+    Activate the associated generated executions based in the running build.
+
+    The `--expansion-file` should contain all the configuration needed to generate the tasks.
+    \f
+    :param expansion_file: Configuration file.
+    :param evergreen_config: Evergreen configuration file.
+    :param verbose: Use verbose logging.
+    """
+    enable_logging(verbose)
+    expansions = EvgExpansions.from_yaml_file(expansion_file)
+    evg_api = RetryingEvergreenApi.get_api(config_file=evergreen_config)
+
+    activate_task(expansions.build_id, expansions.task, evg_api)
+
+
+if __name__ == "__main__":
+    main()  # pylint: disable=no-value-for-parameter
diff --git a/buildscripts/evergreen_gen_build_variant.py b/buildscripts/evergreen_gen_build_variant.py
new file mode 100644
index 00000000000..488b98e65fb
--- /dev/null
+++ b/buildscripts/evergreen_gen_build_variant.py
@@ -0,0 +1,457 @@
+#!/usr/bin/env python3
+"""Generate configuration for a build variant."""
+import os
+import re
+from concurrent.futures import ThreadPoolExecutor as Executor
+from datetime import datetime, timedelta
+from time import perf_counter
+from typing import Optional, Any, List, Set
+
+import click
+import inject
+import structlog
+from pydantic import BaseModel
+from evergreen import EvergreenApi, RetryingEvergreenApi
+from evergreen import Task as EvgTask
+
+from buildscripts.ciconfig.evergreen import EvergreenProjectConfig, parse_evergreen_file, Task, \
+    Variant
+from buildscripts.task_generation.evg_config_builder import EvgConfigBuilder
+from buildscripts.task_generation.gen_config import GenerationConfiguration
+from buildscripts.task_generation.gen_task_validation import GenTaskValidationService
+from buildscripts.task_generation.multiversion_util import MultiversionUtilService, \
+    SHARDED_MIXED_VERSION_CONFIGS, REPL_MIXED_VERSION_CONFIGS
+from buildscripts.task_generation.resmoke_proxy import ResmokeProxyConfig
+from buildscripts.task_generation.suite_split import SuiteSplitConfig, SuiteSplitParameters
+from buildscripts.task_generation.suite_split_strategies import SplitStrategy, FallbackStrategy, \
+    greedy_division, round_robin_fallback
+from buildscripts.task_generation.task_types.fuzzer_tasks import FuzzerGenTaskParams
+from buildscripts.task_generation.task_types.gentask_options import GenTaskOptions
+from buildscripts.task_generation.task_types.multiversion_tasks import MultiversionGenTaskParams
+from buildscripts.task_generation.task_types.resmoke_tasks import ResmokeGenTaskParams
+from buildscripts.util.cmdutils import enable_logging
+from buildscripts.util.fileops import read_yaml_file
+from buildscripts.util.taskname import remove_gen_suffix
+
+LOGGER = structlog.get_logger(__name__)
+
+DEFAULT_TEST_SUITE_DIR = os.path.join("buildscripts", "resmokeconfig", "suites")
+MAX_WORKERS = 16
+LOOKBACK_DURATION_DAYS = 14
+MAX_TASK_PRIORITY = 99
+GENERATED_CONFIG_DIR = "generated_resmoke_config"
+GEN_PARENT_TASK = "generator_tasks"
+EXPANSION_RE = re.compile(r"\${(?P<id>[a-zA-Z0-9_]+)(\|(?P<default>.*))?}")
+
+
+class EvgExpansions(BaseModel):
+    """
+    Evergreen expansions needed to generate tasks.
+
+    build_id: Build ID being run under.
+    build_variant: Build variant being generated.
+    gen_task_gran: Granularity of how tasks are being generated.
+    is_patch: Whether generation is part of a patch build.
+    project: Evergreen project being run under.
+    max_test_per_suite: Maximum amount of tests to include in a suite.
+    max_sub_suites: Maximum number of sub-suites to generate per task.
+    revision: Git revision being run against.
+    task_name: Name of task running.
+    target_resmoke_time: Target time of generated sub-suites.
+    task_id: ID of task being run under.
+    """
+
+    build_id: str
+    build_variant: str
+    is_patch: Optional[bool]
+    project: str
+    max_tests_per_suite: Optional[int] = 100
+    max_sub_suites: Optional[int] = 5
+    revision: str
+    task_name: str
+    target_resmoke_time: Optional[int] = None
+    task_id: str
+
+    @classmethod
+    def from_yaml_file(cls, path: str) -> "EvgExpansions":
+        """
+        Read the evergreen expansions from the given YAML file.
+
+        :param path: Path to expansions YAML file.
+        :return: Expansions read from file.
+        """
+        return cls(**read_yaml_file(path))
+
+    def build_suite_split_config(self, start_date: datetime,
+                                 end_date: datetime) -> SuiteSplitConfig:
+        """
+        Get the configuration for splitting suites based on Evergreen expansions.
+
+        :param start_date: Start date for historic stats lookup.
+        :param end_date: End date for historic stats lookup.
+        :return: Configuration to use for splitting suites.
+        """
+        return SuiteSplitConfig(
+            evg_project=self.project,
+            target_resmoke_time=self.target_resmoke_time if self.target_resmoke_time else 60,
+            max_sub_suites=self.max_sub_suites,
+            max_tests_per_suite=self.max_tests_per_suite,
+            start_date=start_date,
+            end_date=end_date,
+        )
+
+    def build_evg_config_gen_options(self) -> GenTaskOptions:
+        """
+        Get the configuration for generating tasks from Evergreen expansions.
+
+        :return: Configuration to use for splitting suites.
+        """
+        return GenTaskOptions(
+            create_misc_suite=True,
+            is_patch=self.is_patch,
+            generated_config_dir=GENERATED_CONFIG_DIR,
+            use_default_timeouts=False,
+        )
+
+    def config_location(self) -> str:
+        """Location where generated configuration is stored."""
+        task = remove_gen_suffix(self.task_name)
+        return f"{self.build_variant}/{self.revision}/generate_tasks/{task}_gen-{self.build_id}.tgz"
+
+
+def translate_run_var(run_var: str, build_variant: Variant) -> Any:
+    """
+    Translate the given "run_var" into an actual value.
+
+    Run_vars can contain evergreen expansions, in which case, the expansion (and possible default
+    value) need to be translated into a value we can use.
+
+    :param run_var: Run var to translate.
+    :param build_variant: Build variant configuration.
+    :return: Value of run_var.
+    """
+    match = EXPANSION_RE.search(run_var)
+    if match:
+        value = build_variant.expansion(match.group("id"))
+        if value is None:
+            value = match.group("default")
+        return value
+    return run_var
+
+
+def get_version_configs(is_sharded: bool) -> List[str]:
+    """Get the version configurations to use."""
+    if is_sharded:
+        return SHARDED_MIXED_VERSION_CONFIGS
+    return REPL_MIXED_VERSION_CONFIGS
+
+
+class GenerateBuildVariantOrchestrator:
+    """Orchestrator for generating tasks in a build variant."""
+
+    # pylint: disable=too-many-arguments
+    @inject.autoparams()
+    def __init__(
+            self,
+            gen_task_validation: GenTaskValidationService,
+            gen_task_options: GenTaskOptions,
+            evg_project_config: EvergreenProjectConfig,
+            evg_expansions: EvgExpansions,
+            multiversion_util: MultiversionUtilService,
+            evg_api: EvergreenApi,
+    ) -> None:
+        """
+        Initialize the orchestrator.
+
+        :param gen_task_validation: Service to validate task generation.
+        :param gen_task_options: Options for how tasks should be generated.
+        :param evg_project_config: Configuration for Evergreen Project.
+        :param evg_expansions: Evergreen expansions for running task.
+        :param multiversion_util: Multiversion utility service.
+        :param evg_api: Evergreen API client.
+        """
+        self.gen_task_validation = gen_task_validation
+        self.gen_task_options = gen_task_options
+        self.evg_project_config = evg_project_config
+        self.evg_expansions = evg_expansions
+        self.multiversion_util = multiversion_util
+        self.evg_api = evg_api
+
+    def get_build_variant_expansion(self, build_variant_name: str, expansion: str) -> Any:
+        """
+        Get the value of the given expansion for the specified build variant.
+
+        :param build_variant_name: Build Variant to query.
+        :param expansion: Expansion to query.
+        :return: Value of given expansion.
+        """
+        build_variant = self.evg_project_config.get_variant(build_variant_name)
+        return build_variant.expansion(expansion)
+
+    @staticmethod
+    def task_def_to_split_params(task_def: Task, build_variant: str) -> SuiteSplitParameters:
+        """
+        Build parameters for how a task should be split based on its task definition.
+
+        :param task_def: Task definition in evergreen project config.
+        :param build_variant: Name of Build Variant being generated.
+        :return: Parameters for how task should be split.
+        """
+        task = remove_gen_suffix(task_def.name)
+        run_func = task_def.generate_resmoke_tasks_command
+        if run_func is None:
+            run_func = task_def.generate_implicit_multiversion_command()
+        run_vars = run_func.get("vars", {})
+
+        suite = run_vars.get("suite", task)
+        return SuiteSplitParameters(
+            build_variant=build_variant,
+            task_name=task,
+            suite_name=suite,
+            filename=suite,
+        )
+
+    def task_def_to_gen_params(self, task_def: Task, build_variant: str) -> ResmokeGenTaskParams:
+        """
+        Build parameters for how a task should be generated based on its task definition.
+
+        :param task_def: Task definition in evergreen project config.
+        :param build_variant: Name of Build Variant being generated.
+        :return: Parameters for how task should be generated.
+        """
+        run_func = task_def.generate_resmoke_tasks_command
+        run_vars = run_func["vars"]
+
+        return ResmokeGenTaskParams(
+            use_large_distro=run_vars.get("use_large_distro"),
+            require_multiversion=run_vars.get("require_multiversion"),
+            repeat_suites=1,
+            resmoke_args=run_vars.get("resmoke_args"),
+            resmoke_jobs_max=run_vars.get("resmoke_jobs_max"),
+            large_distro_name=self.get_build_variant_expansion(build_variant, "large_distro_name"),
+            config_location=self.evg_expansions.config_location(),
+        )
+
+    def task_def_to_mv_gen_params(self, task_def: Task, build_variant: str, is_sharded: bool,
+                                  version_config: List[str]) -> MultiversionGenTaskParams:
+        """
+        Build parameters for how a task should be generated based on its task definition.
+
+        :param task_def: Task definition in evergreen project config.
+        :param build_variant: Name of Build Variant being generated.
+        :return: Parameters for how task should be generated.
+        """
+        run_func = task_def.generate_implicit_multiversion_command()
+        run_vars = run_func["vars"]
+
+        task = remove_gen_suffix(task_def.name)
+
+        return MultiversionGenTaskParams(
+            mixed_version_configs=version_config,
+            is_sharded=is_sharded,
+            resmoke_args=run_vars.get("resmoke_args"),
+            parent_task_name=task,
+            origin_suite=run_vars.get("suite", task),
+            use_large_distro=run_vars.get("use_large_distro"),
+            large_distro_name=self.get_build_variant_expansion(build_variant, "large_distro_name"),
+            config_location=self.evg_expansions.config_location(),
+        )
+
+    def task_def_to_fuzzer_params(
+            self, task_def: Task, build_variant: str, is_sharded: Optional[bool] = None,
+            version_config: Optional[List[str]] = None) -> FuzzerGenTaskParams:
+        """
+        Build parameters for how a fuzzer task should be generated based on its task definition.
+
+        :param task_def: Task definition in evergreen project config.
+        :param build_variant: Name of Build Variant being generated.
+        :return: Parameters for how a fuzzer task should be generated.
+        """
+        variant = self.evg_project_config.get_variant(build_variant)
+        if is_sharded is not None or version_config is not None:
+            run_func = task_def.generate_implicit_multiversion_command()
+        else:
+            run_func = task_def.generate_fuzzer_tasks_command()
+        run_vars = run_func["vars"]
+        run_vars = {k: translate_run_var(v, variant) for k, v in run_vars.items()}
+
+        return FuzzerGenTaskParams(
+            task_name=run_vars.get("name"),
+            variant=build_variant,
+            suite=run_vars.get("suite"),
+            num_files=int(run_vars.get("num_files")),
+            num_tasks=int(run_vars.get("num_tasks")),
+            resmoke_args=run_vars.get("resmoke_args"),
+            npm_command=run_vars.get("npm_command", "jstestfuzz"),
+            jstestfuzz_vars=run_vars.get("jstestfuzz_vars", ""),
+            continue_on_failure=run_vars.get("continue_on_failure"),
+            resmoke_jobs_max=run_vars.get("resmoke_jobs_max"),
+            should_shuffle=run_vars.get("should_shuffle"),
+            timeout_secs=run_vars.get("timeout_secs"),
+            require_multiversion=run_vars.get("require_multiversion"),
+            use_large_distro=run_vars.get("use_large_distro", False),
+            large_distro_name=self.get_build_variant_expansion(build_variant, "large_distro_name"),
+            config_location=self.evg_expansions.config_location(),
+            is_sharded=is_sharded,
+            version_config=version_config,
+        )
+
+    def generate(self, task_id: str, build_variant_name: str, output_file: str) -> None:
+        """
+        Write task configuration for a build variant to disk.
+
+        :param task_id: ID of running task.
+        :param build_variant_name: Name of build variant to generate.
+        :param output_file: Filename to write generated configuration to.
+        """
+        if not self.gen_task_validation.should_task_be_generated(task_id):
+            LOGGER.info("Not generating configuration due to previous successful generation.")
+            return
+
+        builder = EvgConfigBuilder()  # pylint: disable=no-value-for-parameter
+        builder = self.generate_build_variant(builder, build_variant_name)
+
+        generated_config = builder.build(output_file)
+        generated_config.write_all_to_dir(self.gen_task_options.generated_config_dir)
+
+    # pylint: disable=too-many-locals
+    def generate_build_variant(self, builder: EvgConfigBuilder,
+                               build_variant_name: str) -> EvgConfigBuilder:
+        """
+        Generate task configuration for a build variant.
+
+        :param builder: Evergreen configuration builder to use.
+        :param build_variant_name: Name of build variant to generate.
+        :return: Evergreen configuration builder with build variant configuration.
+        """
+        LOGGER.info("Generating config", build_variant=build_variant_name)
+        start_time = perf_counter()
+        task_list = self.evg_project_config.get_variant(build_variant_name).task_names
+        tasks_to_hide = set()
+        with Executor(max_workers=MAX_WORKERS) as exe:
+            jobs = []
+            for task_name in task_list:
+                task_def = self.evg_project_config.get_task(task_name)
+                if task_def.is_generate_resmoke_task:
+                    tasks_to_hide.add(task_name)
+                    split_params = self.task_def_to_split_params(task_def, build_variant_name)
+                    gen_params = self.task_def_to_gen_params(task_def, build_variant_name)
+                    jobs.append(exe.submit(builder.generate_suite, split_params, gen_params))
+                elif task_def.is_generate_fuzzer_task():
+                    tasks_to_hide.add(task_name)
+                    fuzzer_params = self.task_def_to_fuzzer_params(task_def, build_variant_name)
+                    jobs.append(exe.submit(builder.generate_fuzzer, fuzzer_params))
+                elif task_def.is_generate_implicit_multiversion_task():
+                    tasks_to_hide.add(task_name)
+                    run_func = task_def.generate_implicit_multiversion_command()
+                    run_vars = run_func["vars"]
+                    is_jstestjuzz = run_vars.get("is_jstestfuzz", False)
+                    suite = run_vars["suite"]
+                    is_sharded = self.multiversion_util.is_suite_sharded(suite)
+                    version_list = get_version_configs(is_sharded)
+                    if is_jstestjuzz:
+                        fuzzer_params = self.task_def_to_fuzzer_params(
+                            task_def, build_variant_name, is_sharded, version_list)
+                        jobs.append(exe.submit(builder.generate_fuzzer, fuzzer_params))
+                    else:
+                        split_params = self.task_def_to_split_params(task_def, build_variant_name)
+                        gen_params = self.task_def_to_mv_gen_params(task_def, build_variant_name,
+                                                                    is_sharded, version_list)
+                        jobs.append(
+                            exe.submit(builder.add_multiversion_suite, split_params, gen_params))
+
+            [j.result() for j in jobs]  # pylint: disable=expression-not-assigned
+
+        end_time = perf_counter()
+        duration = end_time - start_time
+
+        LOGGER.info("Finished BV", build_variant=build_variant_name, duration=duration,
+                    task_count=len(tasks_to_hide))
+
+        builder.add_display_task(GEN_PARENT_TASK, tasks_to_hide, build_variant_name)
+        self.adjust_gen_tasks_priority(tasks_to_hide)
+        return builder
+
+    def adjust_task_priority(self, task: EvgTask) -> None:
+        """
+        Increase the priority of the given task by 1.
+
+        :param task: Task to increase priority of.
+        """
+        priority = min(task.priority + 1, MAX_TASK_PRIORITY)
+        LOGGER.info("Configure task", task_id=task.task_id, priority=priority)
+        self.evg_api.configure_task(task.task_id, priority=priority)
+
+    def adjust_gen_tasks_priority(self, gen_tasks: Set[str]) -> None:
+        """
+        Increase the priority of any "_gen" tasks.
+
+        We want to minimize the time it tasks for the "_gen" tasks to activate the generated
+        sub-tasks. We will do that by increase the priority of the "_gen" tasks.
+
+        :param gen_tasks: Set of "_gen" tasks that were found.
+        """
+        build = self.evg_api.build_by_id(self.evg_expansions.build_id)
+        task_list = build.get_tasks()
+
+        with Executor(max_workers=MAX_WORKERS) as exe:
+            jobs = [
+                exe.submit(self.adjust_task_priority, task) for task in task_list
+                if task.display_name in gen_tasks
+            ]
+
+        [j.result() for j in jobs]  # pylint: disable=expression-not-assigned
+
+
+@click.command()
+@click.option("--expansion-file", type=str, required=True,
+              help="Location of expansions file generated by evergreen.")
+@click.option("--evg-api-config", type=str, required=True,
+              help="Location of evergreen api configuration.")
+@click.option("--evg-project-config", type=str, default="etc/evergreen.yml",
+              help="Location of Evergreen project configuration.")
+@click.option("--output-file", type=str, help="Name of output file to write.")
+@click.option("--verbose", is_flag=True, default=False, help="Enable verbose logging.")
+def main(expansion_file: str, evg_api_config: str, evg_project_config: str, output_file: str,
+         verbose: bool) -> None:
+    """
+    Generate task configuration for a build variant.
+    \f
+    :param expansion_file: Location of evergreen expansions for task.
+    :param evg_api_config: Location of file containing evergreen API authentication information.
+    :param evg_project_config: Location of file containing evergreen project configuration.
+    :param output_file: Location to write generated configuration to.
+    :param verbose: Should verbose logging be used.
+    """
+    enable_logging(verbose)
+
+    end_date = datetime.utcnow().replace(microsecond=0)
+    start_date = end_date - timedelta(days=LOOKBACK_DURATION_DAYS)
+
+    evg_expansions = EvgExpansions.from_yaml_file(expansion_file)
+
+    # pylint: disable=no-value-for-parameter
+    def dependencies(binder: inject.Binder) -> None:
+        binder.bind(EvgExpansions, evg_expansions)
+        binder.bind(SuiteSplitConfig, evg_expansions.build_suite_split_config(start_date, end_date))
+        binder.bind(SplitStrategy, greedy_division)
+        binder.bind(FallbackStrategy, round_robin_fallback)
+        binder.bind(GenTaskOptions, evg_expansions.build_evg_config_gen_options())
+        binder.bind(EvergreenApi, RetryingEvergreenApi.get_api(config_file=evg_api_config))
+        binder.bind(EvergreenProjectConfig, parse_evergreen_file(evg_project_config))
+        binder.bind(GenerationConfiguration, GenerationConfiguration.from_yaml_file())
+        binder.bind(ResmokeProxyConfig,
+                    ResmokeProxyConfig(resmoke_suite_dir=DEFAULT_TEST_SUITE_DIR))
+
+    inject.configure(dependencies)
+
+    orchestrator = GenerateBuildVariantOrchestrator()  # pylint: disable=no-value-for-parameter
+    start_time = perf_counter()
+    orchestrator.generate(evg_expansions.task_id, evg_expansions.build_variant, output_file)
+    end_time = perf_counter()
+
+    LOGGER.info("Total runtime", duration=end_time - start_time)
+
+
+if __name__ == '__main__':
+    main()  # pylint: disable=no-value-for-parameter
diff --git a/buildscripts/evergreen_gen_fuzzer_tests.py b/buildscripts/evergreen_gen_fuzzer_tests.py
deleted file mode 100755
index b0c41011741..00000000000
--- a/buildscripts/evergreen_gen_fuzzer_tests.py
+++ /dev/null
@@ -1,178 +0,0 @@
-#!/usr/bin/env python3
-"""Generate fuzzer tests to run in evergreen in parallel."""
-import os
-from typing import Optional
-
-import click
-import inject
-from pydantic import BaseModel
-from evergreen import EvergreenApi, RetryingEvergreenApi
-
-from buildscripts.task_generation.evg_config_builder import EvgConfigBuilder
-from buildscripts.task_generation.gen_config import GenerationConfiguration
-from buildscripts.task_generation.gen_task_service import GenTaskOptions, FuzzerGenTaskParams
-from buildscripts.task_generation.gen_task_validation import GenTaskValidationService
-from buildscripts.task_generation.generated_config import GeneratedConfiguration
-from buildscripts.task_generation.resmoke_proxy import ResmokeProxyConfig
-from buildscripts.task_generation.suite_split import SuiteSplitService
-from buildscripts.util.cmdutils import enable_logging
-from buildscripts.util.fileops import read_yaml_file
-
-CONFIG_DIRECTORY = "generated_resmoke_config"
-GEN_PARENT_TASK = "generator_tasks"
-GENERATE_CONFIG_FILE = "etc/generate_subtasks_config.yml"
-DEFAULT_TEST_SUITE_DIR = os.path.join("buildscripts", "resmokeconfig", "suites")
-EVG_CONFIG_FILE = "./.evergreen.yml"
-
-
-class EvgExpansions(BaseModel):
-    """
-    Evergreen expansions to read for configuration.
-
-    build_id: ID of build being run.
-    build_variant: Build Variant being run on.
-    continue_on_failure: Should tests continue after encountering a failure.
-    is_patch: Are tests being run in a patch build.
-    jstestfuzz_vars: Variable to pass to jstestfuzz command.
-    large_distro_name: Name of "large" distro to use.
-    name: Name of task to generate.
-    npm_command: NPM command to generate fuzzer tests.
-    num_files: Number of fuzzer files to generate.
-    num_tasks: Number of sub-tasks to generate.
-    resmoke_args: Arguments to pass to resmoke.
-    resmoke_jobs_max: Max number of jobs resmoke should execute in parallel.
-    revision: git revision being run against.
-    should_shuffle: Should remove shuffle tests before executing.
-    suite: Resmoke suite to run the tests.
-    task_id: ID of task currently being executed.
-    require_multiversion: Requires downloading Multiversion binaries.
-    timeout_secs: Timeout to set for task execution.
-    use_large_distro: Should tasks be generated to run on a large distro.
-    """
-
-    build_id: str
-    build_variant: str
-    continue_on_failure: bool
-    is_patch: Optional[bool]
-    jstestfuzz_vars: Optional[str]
-    large_distro_name: Optional[str]
-    name: str
-    npm_command: Optional[str]
-    num_files: int
-    num_tasks: int
-    resmoke_args: str
-    resmoke_jobs_max: int
-    revision: str
-    should_shuffle: bool
-    suite: str
-    task_id: str
-    timeout_secs: int
-    use_large_distro: Optional[bool]
-    require_multiversion: Optional[bool]
-
-    @classmethod
-    def from_yaml_file(cls, path: str) -> "EvgExpansions":
-        """
-        Read the generation configuration from the given file.
-
-        :param path: Path to file.
-        :return: Parse evergreen expansions.
-        """
-        return cls(**read_yaml_file(path))
-
-    def gen_task_options(self) -> GenTaskOptions:
-        """Determine the options for generating tasks based on the given expansions."""
-        return GenTaskOptions(
-            is_patch=self.is_patch,
-            create_misc_suite=True,
-            generated_config_dir=CONFIG_DIRECTORY,
-            use_default_timeouts=False,
-        )
-
-    def fuzzer_gen_task_params(self) -> FuzzerGenTaskParams:
-        """Determine the parameters for generating fuzzer tasks based on the given expansions."""
-        return FuzzerGenTaskParams(
-            task_name=self.name, num_files=self.num_files, num_tasks=self.num_tasks,
-            resmoke_args=self.resmoke_args, npm_command=self.npm_command or "jstestfuzz",
-            jstestfuzz_vars=self.jstestfuzz_vars, variant=self.build_variant,
-            continue_on_failure=self.continue_on_failure, resmoke_jobs_max=self.resmoke_jobs_max,
-            should_shuffle=self.should_shuffle, timeout_secs=self.timeout_secs,
-            require_multiversion=self.require_multiversion, suite=self.suite,
-            use_large_distro=self.use_large_distro, large_distro_name=self.large_distro_name,
-            config_location=
-            f"{self.build_variant}/{self.revision}/generate_tasks/{self.name}_gen-{self.build_id}.tgz"
-        )
-
-
-class EvgGenFuzzerOrchestrator:
-    """Orchestrate the generation of fuzzer tasks."""
-
-    @inject.autoparams()
-    def __init__(self, validation_service: GenTaskValidationService) -> None:
-        """
-        Initialize the orchestrator.
-
-        :param validation_service: Validation Service for generating tasks.
-        """
-        self.validation_service = validation_service
-
-    @staticmethod
-    def generate_config(fuzzer_params: FuzzerGenTaskParams) -> GeneratedConfiguration:
-        """
-        Generate a fuzzer task based on the given parameters.
-
-        :param fuzzer_params: Parameters describing how fuzzer should be generated.
-        :return: Configuration to generate the specified fuzzer.
-        """
-        builder = EvgConfigBuilder()  # pylint: disable=no-value-for-parameter
-
-        builder.generate_fuzzer(fuzzer_params)
-        builder.add_display_task(GEN_PARENT_TASK, {f"{fuzzer_params.task_name}_gen"},
-                                 fuzzer_params.variant)
-        return builder.build(fuzzer_params.task_name + ".json")
-
-    def generate_fuzzer(self, task_id: str, fuzzer_params: FuzzerGenTaskParams) -> None:
-        """
-        Save the configuration to generate the specified fuzzer to disk.
-
-        :param task_id: ID of task doing the generation.
-        :param fuzzer_params: Parameters describing how fuzzer should be generated.
-        """
-        if not self.validation_service.should_task_be_generated(task_id):
-            print("Not generating configuration due to previous successful generation.")
-            return
-
-        generated_config = self.generate_config(fuzzer_params)
-        generated_config.write_all_to_dir(CONFIG_DIRECTORY)
-
-
-@click.command()
-@click.option("--expansion-file", type=str, required=True,
-              help="Location of expansions file generated by evergreen.")
-@click.option("--evergreen-config", type=str, default=EVG_CONFIG_FILE,
-              help="Location of evergreen configuration file.")
-@click.option("--verbose", is_flag=True, default=False, help="Enable verbose logging.")
-def main(expansion_file: str, evergreen_config: str, verbose: bool) -> None:
-    """Generate fuzzer tests to run in evergreen."""
-    enable_logging(verbose)
-
-    evg_expansions = EvgExpansions.from_yaml_file(expansion_file)
-
-    def dependencies(binder: inject.Binder) -> None:
-        binder.bind(SuiteSplitService, None)
-        binder.bind(GenTaskOptions, evg_expansions.gen_task_options())
-        binder.bind(EvergreenApi, RetryingEvergreenApi.get_api(config_file=evergreen_config))
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(GENERATE_CONFIG_FILE))
-        binder.bind(ResmokeProxyConfig,
-                    ResmokeProxyConfig(resmoke_suite_dir=DEFAULT_TEST_SUITE_DIR))
-
-    inject.configure(dependencies)
-
-    gen_fuzzer_orchestrator = EvgGenFuzzerOrchestrator()  # pylint: disable=no-value-for-parameter
-    gen_fuzzer_orchestrator.generate_fuzzer(evg_expansions.task_id,
-                                            evg_expansions.fuzzer_gen_task_params())
-
-
-if __name__ == '__main__':
-    main()  # pylint: disable=no-value-for-parameter
diff --git a/buildscripts/evergreen_gen_multiversion_tests.py b/buildscripts/evergreen_gen_multiversion_tests.py
index a042fcbc080..e4cfcaf2ec3 100755
--- a/buildscripts/evergreen_gen_multiversion_tests.py
+++ b/buildscripts/evergreen_gen_multiversion_tests.py
@@ -1,66 +1,34 @@
 #!/usr/bin/env python3
 """Generate multiversion tests to run in evergreen in parallel."""
 
-from datetime import datetime, timedelta
 import os
 import re
 import tempfile
-from typing import Optional, List
 from collections import defaultdict
 from sys import platform
 
 from subprocess import check_output
 
-import inject
 import requests
 import click
 import structlog
-from pydantic import BaseModel
-
-from shrub.v2 import ExistingTask
-from evergreen.api import RetryingEvergreenApi, EvergreenApi
 
 from buildscripts.resmokelib.multiversionconstants import (
     LAST_LTS_MONGO_BINARY, LAST_CONTINUOUS_MONGO_BINARY, REQUIRES_FCV_TAG)
-from buildscripts.task_generation.evg_config_builder import EvgConfigBuilder
-from buildscripts.task_generation.gen_config import GenerationConfiguration
-from buildscripts.task_generation.generated_config import GeneratedConfiguration
-from buildscripts.task_generation.multiversion_util import MultiversionUtilService
-from buildscripts.task_generation.resmoke_proxy import ResmokeProxyConfig
-from buildscripts.task_generation.suite_split import SuiteSplitConfig, SuiteSplitParameters
-from buildscripts.task_generation.suite_split_strategies import SplitStrategy, FallbackStrategy, \
-    greedy_division, round_robin_fallback
-from buildscripts.task_generation.task_types.fuzzer_tasks import FuzzerGenTaskParams
-from buildscripts.task_generation.task_types.gentask_options import GenTaskOptions
-from buildscripts.task_generation.task_types.multiversion_tasks import MultiversionGenTaskParams
 from buildscripts.util.cmdutils import enable_logging
 from buildscripts.util.fileops import read_yaml_file
-import buildscripts.evergreen_generate_resmoke_tasks as generate_resmoke
-import buildscripts.evergreen_gen_fuzzer_tests as gen_fuzzer
 import buildscripts.ciconfig.tags as _tags
 
 # pylint: disable=len-as-condition
-from buildscripts.util.taskname import remove_gen_suffix
 
 LOGGER = structlog.getLogger(__name__)
 
 DEFAULT_CONFIG_DIR = "generated_resmoke_config"
 CONFIG_DIR = DEFAULT_CONFIG_DIR
-DEFAULT_TEST_SUITE_DIR = os.path.join("buildscripts", "resmokeconfig", "suites")
-LOOKBACK_DURATION_DAYS = 14
-CONFIG_FILE = generate_resmoke.EVG_CONFIG_FILE
-REPL_MIXED_VERSION_CONFIGS = ["new-old-new", "new-new-old", "old-new-new"]
-SHARDED_MIXED_VERSION_CONFIGS = ["new-old-old-new"]
-
-BURN_IN_TASK = "burn_in_tests_multiversion"
-MULTIVERSION_CONFIG_KEY = "use_in_multiversion"
-PASSTHROUGH_TAG = "multiversion_passthrough"
-RANDOM_REPLSETS_TAG = "random_multiversion_ds"
+
 BACKPORT_REQUIRED_TAG = "backport_required_multiversion"
 EXCLUDE_TAGS = f"{REQUIRES_FCV_TAG},multiversion_incompatible,{BACKPORT_REQUIRED_TAG}"
 EXCLUDE_TAGS_FILE = "multiversion_exclude_tags.yml"
-GEN_PARENT_TASK = "generator_tasks"
-ASAN_SIGNATURE = "detect_leaks=1"
 
 # The directory in which BACKPORTS_REQUIRED_FILE resides.
 ETC_DIR = "etc"
@@ -68,158 +36,6 @@ BACKPORTS_REQUIRED_FILE = "backports_required_for_multiversion_tests.yml"
 BACKPORTS_REQUIRED_BASE_URL = "https://raw.githubusercontent.com/mongodb/mongo"
 
 
-class EvgExpansions(BaseModel):
-    """Evergreen expansions file contents."""
-
-    project: str
-    target_resmoke_time: int = 60
-    max_sub_suites: int = 5
-    max_tests_per_suite: int = 100
-    san_options: Optional[str]
-    task_name: str
-    suite: Optional[str]
-    num_files: Optional[int]
-    num_tasks: Optional[int]
-    resmoke_args: Optional[str]
-    npm_command: Optional[str]
-    jstestfuzz_vars: Optional[str]
-    build_variant: str
-    continue_on_failure: Optional[bool]
-    resmoke_jobs_max: Optional[int]
-    should_shuffle: Optional[bool]
-    timeout_secs: Optional[int]
-    require_multiversion: Optional[bool]
-    use_large_distro: Optional[bool]
-    large_distro_name: Optional[str]
-    revision: str
-    build_id: str
-    create_misc_suite: bool = True
-    is_patch: bool = False
-    is_jstestfuzz: bool = False
-
-    @property
-    def task(self) -> str:
-        """Get the name of the task."""
-        return remove_gen_suffix(self.task_name)
-
-    @classmethod
-    def from_yaml_file(cls, path: str) -> "EvgExpansions":
-        """Read the evergreen expansions from the given file."""
-        return cls(**read_yaml_file(path))
-
-    def config_location(self) -> str:
-        """Get the location to store the configuration."""
-        return f"{self.build_variant}/{self.revision}/generate_tasks/{self.task}_gen-{self.build_id}.tgz"
-
-    def is_asan_build(self) -> bool:
-        """Determine if this task is an ASAN build."""
-        san_options = self.san_options
-        if san_options:
-            return ASAN_SIGNATURE in san_options
-        return False
-
-    def get_generation_options(self) -> GenTaskOptions:
-        """Get options for how tasks should be generated."""
-        return GenTaskOptions(
-            create_misc_suite=self.create_misc_suite,
-            is_patch=self.is_patch,
-            generated_config_dir=DEFAULT_CONFIG_DIR,
-            use_default_timeouts=False,
-        )
-
-    def get_fuzzer_params(self, version_config: str, is_sharded: bool) -> FuzzerGenTaskParams:
-        """
-        Get parameters to generate fuzzer tasks.
-
-        :param version_config: Version configuration to generate for.
-        :param is_sharded: If configuration is for sharded tests.
-        :return: Parameters to generate fuzzer tasks.
-        """
-        name = f"{self.suite}_multiversion_{version_config}"
-        add_resmoke_args = get_multiversion_resmoke_args(is_sharded)
-        resmoke_args = f"{self.resmoke_args or ''} --mixedBinVersions={version_config} {add_resmoke_args}"
-
-        return FuzzerGenTaskParams(
-            num_files=self.num_files,
-            num_tasks=self.num_tasks,
-            resmoke_args=resmoke_args,
-            npm_command=self.npm_command,
-            jstestfuzz_vars=self.jstestfuzz_vars,
-            task_name=name,
-            variant=self.build_variant,
-            continue_on_failure=self.continue_on_failure,
-            resmoke_jobs_max=self.resmoke_jobs_max,
-            should_shuffle=self.should_shuffle,
-            timeout_secs=self.timeout_secs,
-            require_multiversion=self.require_multiversion,
-            suite=self.suite or self.task,
-            use_large_distro=self.use_large_distro,
-            large_distro_name=self.large_distro_name,
-            config_location=self.config_location(),
-        )
-
-    def get_split_params(self) -> SuiteSplitParameters:
-        """Get the parameters specified to split suites."""
-        return SuiteSplitParameters(
-            task_name=self.task_name,
-            suite_name=self.suite or self.task,
-            filename=self.suite or self.task,
-            test_file_filter=None,
-            build_variant=self.build_variant,
-            is_asan=self.is_asan_build(),
-        )
-
-    def get_split_config(self, start_date: datetime, end_date: datetime) -> SuiteSplitConfig:
-        """
-        Get the configuration specifed to split suites.
-
-        :param start_date: Start date for historic results query.
-        :param end_date: End date for historic results query.
-        :return: Configuration to use for splitting suites.
-        """
-        return SuiteSplitConfig(
-            evg_project=self.project,
-            target_resmoke_time=self.target_resmoke_time,
-            max_sub_suites=self.max_sub_suites,
-            max_tests_per_suite=self.max_tests_per_suite,
-            start_date=start_date,
-            end_date=end_date,
-        )
-
-    def get_generation_params(self, is_sharded: bool) -> MultiversionGenTaskParams:
-        """
-        Get the parameters to use to generating multiversion tasks.
-
-        :param is_sharded: True if a sharded sutie is being generated.
-        :return: Parameters to use for generating multiversion tasks.
-        """
-        version_config_list = get_version_configs(is_sharded)
-        return MultiversionGenTaskParams(
-            mixed_version_configs=version_config_list,
-            is_sharded=is_sharded,
-            resmoke_args=self.resmoke_args,
-            parent_task_name=self.task,
-            origin_suite=self.suite or self.task,
-            use_large_distro=self.use_large_distro,
-            large_distro_name=self.large_distro_name,
-            config_location=self.config_location(),
-        )
-
-
-def get_version_configs(is_sharded: bool) -> List[str]:
-    """Get the version configurations to use."""
-    if is_sharded:
-        return SHARDED_MIXED_VERSION_CONFIGS
-    return REPL_MIXED_VERSION_CONFIGS
-
-
-def get_multiversion_resmoke_args(is_sharded: bool) -> str:
-    """Return resmoke args used to configure a cluster for multiversion testing."""
-    if is_sharded:
-        return "--numShards=2 --numReplSetNodes=2 "
-    return "--numReplSetNodes=3 --linearChain=on "
-
-
 def get_backports_required_hash_for_shell_version(mongo_shell_path=None):
     """Parse the last-lts shell binary to get the commit hash."""
     if platform.startswith("win"):
@@ -259,128 +75,12 @@ def get_last_lts_yaml(commit_hash):
     return backports_required_last_lts
 
 
-class MultiVersionGenerateOrchestrator:
-    """An orchestrator for generating multiversion tasks."""
-
-    @inject.autoparams()
-    def __init__(self, evg_api: EvergreenApi, multiversion_util: MultiversionUtilService,
-                 gen_task_options: GenTaskOptions) -> None:
-        """
-        Initialize the orchestrator.
-
-        :param evg_api: Evergreen API client.
-        :param multiversion_util: Multiverison utilities service.
-        :param gen_task_options: Options to use for generating tasks.
-        """
-        self.evg_api = evg_api
-        self.multiversion_util = multiversion_util
-        self.gen_task_options = gen_task_options
-
-    def generate_fuzzer(self, evg_expansions: EvgExpansions) -> GeneratedConfiguration:
-        """
-        Generate configuration for the fuzzer task specified by the expansions.
-
-        :param evg_expansions: Evergreen expansions describing what to generate.
-        :return: Configuration to generate the specified task.
-        """
-        suite = evg_expansions.suite
-        is_sharded = self.multiversion_util.is_suite_sharded(suite)
-        version_config_list = get_version_configs(is_sharded)
-
-        builder = EvgConfigBuilder()  # pylint: disable=no-value-for-parameter
-
-        fuzzer_task_set = set()
-        for version_config in version_config_list:
-            fuzzer_params = evg_expansions.get_fuzzer_params(version_config, is_sharded)
-            fuzzer_task = builder.generate_fuzzer(fuzzer_params)
-            fuzzer_task_set = fuzzer_task_set.union(fuzzer_task.sub_tasks)
-
-        existing_tasks = {ExistingTask(task) for task in fuzzer_task_set}
-        existing_tasks.add({ExistingTask(f"{suite}_multiversion_gen")})
-        builder.add_display_task(evg_expansions.task, existing_tasks, evg_expansions.build_variant)
-        return builder.build(f"{evg_expansions.task}.json")
-
-    def generate_resmoke_suite(self, evg_expansions: EvgExpansions) -> GeneratedConfiguration:
-        """
-        Generate configuration for the resmoke task specified by the expansions.
-
-        :param evg_expansions: Evergreen expansions describing what to generate.
-        :return: Configuration to generate the specified task.
-        """
-        suite = evg_expansions.suite or evg_expansions.task
-        is_sharded = self.multiversion_util.is_suite_sharded(suite)
-
-        split_params = evg_expansions.get_split_params()
-        gen_params = evg_expansions.get_generation_params(is_sharded)
-
-        builder = EvgConfigBuilder()  # pylint: disable=no-value-for-parameter
-        builder.add_multiversion_suite(split_params, gen_params)
-        builder.add_display_task(GEN_PARENT_TASK, {f"{split_params.task_name}"},
-                                 evg_expansions.build_variant)
-        return builder.build(f"{evg_expansions.task}.json")
-
-    def generate(self, evg_expansions: EvgExpansions) -> None:
-        """
-        Generate configuration for the specified task and save it to disk.
-
-        :param evg_expansions: Evergreen expansions describing what to generate.
-        """
-        if evg_expansions.is_jstestfuzz:
-            generated_config = self.generate_fuzzer(evg_expansions)
-        else:
-            generated_config = self.generate_resmoke_suite(evg_expansions)
-        generated_config.write_all_to_dir(DEFAULT_CONFIG_DIR)
-
-
 @click.group()
 def main():
     """Serve as an entry point for the 'run' and 'generate-exclude-tags' commands."""
     pass
 
 
-@main.command("run")
-@click.option("--expansion-file", type=str, required=True,
-              help="Location of expansions file generated by evergreen.")
-@click.option("--evergreen-config", type=str, default=CONFIG_FILE,
-              help="Location of evergreen configuration file.")
-def run_generate_tasks(expansion_file: str, evergreen_config: Optional[str] = None):
-    """
-    Create a configuration for generate tasks to create sub suites for the specified resmoke suite.
-
-    Tests using ReplicaSetFixture will be generated to use 3 nodes and linear_chain=True.
-    Tests using ShardedClusterFixture will be generated to use 2 shards with 2 nodes each.
-    The different binary version configurations tested are stored in REPL_MIXED_VERSION_CONFIGS
-    and SHARDED_MIXED_VERSION_CONFIGS.
-
-    The `--expansion-file` should contain all the configuration needed to generate the tasks.
-    \f
-    :param expansion_file: Configuration file.
-    :param evergreen_config: Evergreen configuration file.
-    """
-    enable_logging(False)
-
-    end_date = datetime.utcnow().replace(microsecond=0)
-    start_date = end_date - timedelta(days=LOOKBACK_DURATION_DAYS)
-
-    evg_expansions = EvgExpansions.from_yaml_file(expansion_file)
-
-    def dependencies(binder: inject.Binder) -> None:
-        binder.bind(SuiteSplitConfig, evg_expansions.get_split_config(start_date, end_date))
-        binder.bind(SplitStrategy, greedy_division)
-        binder.bind(FallbackStrategy, round_robin_fallback)
-        binder.bind(GenTaskOptions, evg_expansions.get_generation_options())
-        binder.bind(EvergreenApi, RetryingEvergreenApi.get_api(config_file=evergreen_config))
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(gen_fuzzer.GENERATE_CONFIG_FILE))
-        binder.bind(ResmokeProxyConfig,
-                    ResmokeProxyConfig(resmoke_suite_dir=DEFAULT_TEST_SUITE_DIR))
-
-    inject.configure(dependencies)
-
-    generate_orchestrator = MultiVersionGenerateOrchestrator()  # pylint: disable=no-value-for-parameter
-    generate_orchestrator.generate(evg_expansions)
-
-
 @main.command("generate-exclude-tags")
 @click.option("--output", type=str, default=os.path.join(CONFIG_DIR, EXCLUDE_TAGS_FILE),
               show_default=True, help="Where to output the generated tags.")
diff --git a/buildscripts/evergreen_generate_resmoke_tasks.py b/buildscripts/evergreen_generate_resmoke_tasks.py
deleted file mode 100755
index 9a05eb14ca7..00000000000
--- a/buildscripts/evergreen_generate_resmoke_tasks.py
+++ /dev/null
@@ -1,250 +0,0 @@
-#!/usr/bin/env python3
-"""
-Resmoke Test Suite Generator.
-
-Analyze the evergreen history for tests run under the given task and create new evergreen tasks
-to attempt to keep the task runtime under a specified amount.
-"""
-from datetime import timedelta, datetime
-import os
-import sys
-from typing import Optional
-
-import click
-import inject
-import structlog
-
-from pydantic.main import BaseModel
-from evergreen.api import EvergreenApi, RetryingEvergreenApi
-
-# Get relative imports to work when the package is not installed on the PYTHONPATH.
-from buildscripts.task_generation.gen_task_validation import GenTaskValidationService
-from buildscripts.util.taskname import remove_gen_suffix
-
-if __name__ == "__main__" and __package__ is None:
-    sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-
-# pylint: disable=wrong-import-position
-from buildscripts.task_generation.evg_config_builder import EvgConfigBuilder
-from buildscripts.task_generation.gen_config import GenerationConfiguration
-from buildscripts.task_generation.gen_task_service import GenTaskOptions, ResmokeGenTaskParams
-from buildscripts.task_generation.suite_split_strategies import SplitStrategy, FallbackStrategy, \
-    greedy_division, round_robin_fallback
-from buildscripts.task_generation.resmoke_proxy import ResmokeProxyConfig
-from buildscripts.task_generation.suite_split import SuiteSplitConfig, SuiteSplitParameters
-from buildscripts.util.cmdutils import enable_logging
-from buildscripts.util.fileops import read_yaml_file
-# pylint: enable=wrong-import-position
-
-LOGGER = structlog.getLogger(__name__)
-
-DEFAULT_TEST_SUITE_DIR = os.path.join("buildscripts", "resmokeconfig", "suites")
-EVG_CONFIG_FILE = "./.evergreen.yml"
-GENERATE_CONFIG_FILE = "etc/generate_subtasks_config.yml"
-LOOKBACK_DURATION_DAYS = 14
-GEN_SUFFIX = "_gen"
-GEN_PARENT_TASK = "generator_tasks"
-GENERATED_CONFIG_DIR = "generated_resmoke_config"
-ASAN_SIGNATURE = "detect_leaks=1"
-
-DEFAULT_MAX_SUB_SUITES = 5
-DEFAULT_MAX_TESTS_PER_SUITE = 100
-DEFAULT_TARGET_RESMOKE_TIME = 60
-
-
-class EvgExpansions(BaseModel):
-    """
-    Evergreen expansions file contents.
-
-    build_id: ID of build being run.
-    build_variant: Build variant task is being generated under.
-    is_patch: Is this part of a patch build.
-    large_distro_name: Name of distro to use for 'large' tasks.
-    max_sub_suites: Max number of sub-suites to create for a single task.
-    max_tests_per_suite: Max number of tests to include in a single sub-suite.
-    project: Evergreen project being run in.
-    resmoke_args: Arguments to pass to resmoke for generated tests.
-    resmoke_jobs_max: Max number of jobs for resmoke to run in parallel.
-    resmoke_repeat_suites: Number of times resmoke should repeat each suite.
-    revision: Git revision being run against.
-    san_options: SAN options build variant is running under.
-    suite: Name of test suite being generated.
-    target_resmoke_time: Target time (in minutes) to keep sub-suite under.
-    task_id: ID of task creating the generated configuration.
-    task_name: Name of task creating the generated configuration.
-    use_large_distro: Should the generated tasks run on "large" distros.
-    require_multiversion: Requires downloading Multiversion binaries.
-    """
-
-    build_id: str
-    build_variant: str
-    is_patch: Optional[bool]
-    large_distro_name: Optional[str]
-    max_sub_suites: int = DEFAULT_MAX_SUB_SUITES
-    max_tests_per_suite: int = DEFAULT_MAX_TESTS_PER_SUITE
-    project: str
-    resmoke_args: str = ""
-    resmoke_jobs_max: Optional[int]
-    resmoke_repeat_suites: int = 1
-    revision: str
-    san_options: Optional[str]
-    suite: Optional[str]
-    target_resmoke_time: int = DEFAULT_TARGET_RESMOKE_TIME
-    task_id: str
-    task_name: str
-    use_large_distro: bool = False
-    require_multiversion: Optional[bool]
-
-    @classmethod
-    def from_yaml_file(cls, path: str) -> "EvgExpansions":
-        """Read the generation configuration from the given file."""
-        return cls(**read_yaml_file(path))
-
-    @property
-    def task(self) -> str:
-        """Get the task being generated."""
-        return remove_gen_suffix(self.task_name)
-
-    def is_asan_build(self) -> bool:
-        """Determine if this task is an ASAN build."""
-        san_options = self.san_options
-        if san_options:
-            return ASAN_SIGNATURE in san_options
-        return False
-
-    def get_suite_split_config(self, start_date: datetime, end_date: datetime) -> SuiteSplitConfig:
-        """
-        Get the configuration for splitting suites based on Evergreen expansions.
-
-        :param start_date: Start date for historic stats lookup.
-        :param end_date: End date for historic stats lookup.
-        :return: Configuration to use for splitting suites.
-        """
-        return SuiteSplitConfig(
-            evg_project=self.project,
-            target_resmoke_time=self.target_resmoke_time,
-            max_sub_suites=self.max_sub_suites,
-            max_tests_per_suite=self.max_tests_per_suite,
-            start_date=start_date,
-            end_date=end_date,
-        )
-
-    def get_evg_config_gen_options(self, generated_config_dir: str) -> GenTaskOptions:
-        """
-        Get the configuration for generating tasks from Evergreen expansions.
-
-        :param generated_config_dir: Directory to write generated configuration.
-        :return: Configuration to use for splitting suites.
-        """
-        return GenTaskOptions(
-            create_misc_suite=True,
-            is_patch=self.is_patch,
-            generated_config_dir=generated_config_dir,
-            use_default_timeouts=False,
-        )
-
-    def get_suite_split_params(self) -> SuiteSplitParameters:
-        """Get the parameters to use for splitting suites."""
-        task = remove_gen_suffix(self.task_name)
-        return SuiteSplitParameters(
-            build_variant=self.build_variant,
-            task_name=task,
-            suite_name=self.suite or task,
-            filename=self.suite or task,
-            test_file_filter=None,
-            is_asan=self.is_asan_build(),
-        )
-
-    def get_gen_params(self) -> "ResmokeGenTaskParams":
-        """Get the parameters to use for generating tasks."""
-        return ResmokeGenTaskParams(
-            use_large_distro=self.use_large_distro, large_distro_name=self.large_distro_name,
-            require_multiversion=self.require_multiversion,
-            repeat_suites=self.resmoke_repeat_suites, resmoke_args=self.resmoke_args,
-            resmoke_jobs_max=self.resmoke_jobs_max, config_location=
-            f"{self.build_variant}/{self.revision}/generate_tasks/{self.task}_gen-{self.build_id}.tgz"
-        )
-
-
-class EvgGenResmokeTaskOrchestrator:
-    """Orchestrator for generating an resmoke tasks."""
-
-    @inject.autoparams()
-    def __init__(self, gen_task_validation: GenTaskValidationService,
-                 gen_task_options: GenTaskOptions) -> None:
-        """
-        Initialize the orchestrator.
-
-        :param gen_task_validation: Generate tasks validation service.
-        :param gen_task_options: Options for how tasks are generated.
-        """
-        self.gen_task_validation = gen_task_validation
-        self.gen_task_options = gen_task_options
-
-    def generate_task(self, task_id: str, split_params: SuiteSplitParameters,
-                      gen_params: ResmokeGenTaskParams) -> None:
-        """
-        Generate the specified resmoke task.
-
-        :param task_id: Task ID of generating task.
-        :param split_params: Parameters describing how the task should be split.
-        :param gen_params: Parameters describing how the task should be generated.
-        """
-        LOGGER.debug("config options", split_params=split_params, gen_params=gen_params)
-        if not self.gen_task_validation.should_task_be_generated(task_id):
-            LOGGER.info("Not generating configuration due to previous successful generation.")
-            return
-
-        builder = EvgConfigBuilder()  # pylint: disable=no-value-for-parameter
-
-        builder.generate_suite(split_params, gen_params)
-        builder.add_display_task(GEN_PARENT_TASK, {f"{split_params.task_name}{GEN_SUFFIX}"},
-                                 split_params.build_variant)
-        generated_config = builder.build(split_params.task_name + ".json")
-        generated_config.write_all_to_dir(self.gen_task_options.generated_config_dir)
-
-
-@click.command()
-@click.option("--expansion-file", type=str, required=True,
-              help="Location of expansions file generated by evergreen.")
-@click.option("--evergreen-config", type=str, default=EVG_CONFIG_FILE,
-              help="Location of evergreen configuration file.")
-@click.option("--verbose", is_flag=True, default=False, help="Enable verbose logging.")
-def main(expansion_file: str, evergreen_config: str, verbose: bool) -> None:
-    """
-    Create a configuration for generate tasks to create sub suites for the specified resmoke suite.
-
-    The `--expansion-file` should contain all the configuration needed to generate the tasks.
-    \f
-    :param expansion_file: Configuration file.
-    :param evergreen_config: Evergreen configuration file.
-    :param verbose: Use verbose logging.
-    """
-    enable_logging(verbose)
-
-    end_date = datetime.utcnow().replace(microsecond=0)
-    start_date = end_date - timedelta(days=LOOKBACK_DURATION_DAYS)
-
-    evg_expansions = EvgExpansions.from_yaml_file(expansion_file)
-
-    def dependencies(binder: inject.Binder) -> None:
-        binder.bind(SuiteSplitConfig, evg_expansions.get_suite_split_config(start_date, end_date))
-        binder.bind(SplitStrategy, greedy_division)
-        binder.bind(FallbackStrategy, round_robin_fallback)
-        binder.bind(GenTaskOptions, evg_expansions.get_evg_config_gen_options(GENERATED_CONFIG_DIR))
-        binder.bind(EvergreenApi, RetryingEvergreenApi.get_api(config_file=evergreen_config))
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(GENERATE_CONFIG_FILE))
-        binder.bind(ResmokeProxyConfig,
-                    ResmokeProxyConfig(resmoke_suite_dir=DEFAULT_TEST_SUITE_DIR))
-
-    inject.configure(dependencies)
-
-    gen_task_orchestrator = EvgGenResmokeTaskOrchestrator()  # pylint: disable=no-value-for-parameter
-    gen_task_orchestrator.generate_task(evg_expansions.task_id,
-                                        evg_expansions.get_suite_split_params(),
-                                        evg_expansions.get_gen_params())
-
-
-if __name__ == "__main__":
-    main()  # pylint: disable=no-value-for-parameter
diff --git a/buildscripts/selected_tests.py b/buildscripts/selected_tests.py
index bbb6e4fbbfd..a535705cb98 100644
--- a/buildscripts/selected_tests.py
+++ b/buildscripts/selected_tests.py
@@ -43,15 +43,12 @@ from buildscripts.ciconfig.evergreen import (
     parse_evergreen_file,
     Variant,
 )
-from buildscripts.evergreen_generate_resmoke_tasks import (
-    DEFAULT_TEST_SUITE_DIR,
-    GENERATE_CONFIG_FILE,
-)
 from buildscripts.patch_builds.selected_tests.selected_tests_service import SelectedTestsService
 
 structlog.configure(logger_factory=LoggerFactory())
 LOGGER = structlog.getLogger(__name__)
 
+DEFAULT_TEST_SUITE_DIR = os.path.join("buildscripts", "resmokeconfig", "suites")
 TASK_ID_EXPANSION = "task_id"
 EVERGREEN_FILE = "etc/evergreen.yml"
 EVG_CONFIG_FILE = ".evergreen.yml"
@@ -505,8 +502,7 @@ def main(
         binder.bind(SplitStrategy, greedy_division)
         binder.bind(FallbackStrategy, round_robin_fallback)
         binder.bind(GenTaskOptions, evg_expansions.build_gen_task_options())
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(GENERATE_CONFIG_FILE))
+        binder.bind(GenerationConfiguration, GenerationConfiguration.from_yaml_file())
         binder.bind(ResmokeProxyConfig,
                     ResmokeProxyConfig(resmoke_suite_dir=DEFAULT_TEST_SUITE_DIR))
 
diff --git a/buildscripts/task_generation/evg_config_builder.py b/buildscripts/task_generation/evg_config_builder.py
index 09ba4dfab7d..0f40418bef4 100644
--- a/buildscripts/task_generation/evg_config_builder.py
+++ b/buildscripts/task_generation/evg_config_builder.py
@@ -56,7 +56,7 @@ class EvgConfigBuilder:
         :return: BuildVariant object being created.
         """
         if build_variant not in self.build_variants:
-            self.build_variants[build_variant] = BuildVariant(build_variant)
+            self.build_variants[build_variant] = BuildVariant(build_variant, activate=False)
         return self.build_variants[build_variant]
 
     def _generate_suites_config(self, generated_suite: GeneratedSuite) -> List[GeneratedFile]:
diff --git a/buildscripts/task_generation/gen_config.py b/buildscripts/task_generation/gen_config.py
index dba51a44ce1..94834de089b 100644
--- a/buildscripts/task_generation/gen_config.py
+++ b/buildscripts/task_generation/gen_config.py
@@ -5,6 +5,8 @@ from pydantic import BaseModel
 
 from buildscripts.util.fileops import read_yaml_file
 
+GENERATE_CONFIG_FILE = "etc/generate_subtasks_config.yml"
+
 
 class GenerationConfiguration(BaseModel):
     """Configuration for generating sub-tasks."""
@@ -12,7 +14,7 @@ class GenerationConfiguration(BaseModel):
     build_variant_large_distro_exceptions: Set[str]
 
     @classmethod
-    def from_yaml_file(cls, path: str) -> "GenerationConfiguration":
+    def from_yaml_file(cls, path: str = GENERATE_CONFIG_FILE) -> "GenerationConfiguration":
         """Read the generation configuration from the given file."""
         return cls(**read_yaml_file(path))
 
diff --git a/buildscripts/task_generation/gen_task_service.py b/buildscripts/task_generation/gen_task_service.py
index 1a8eb463237..6492df50995 100644
--- a/buildscripts/task_generation/gen_task_service.py
+++ b/buildscripts/task_generation/gen_task_service.py
@@ -82,9 +82,9 @@ class GenTaskService:
                                    params.large_distro_name)
         if params.add_to_display_task:
             build_variant.display_task(fuzzer_task.task_name, fuzzer_task.sub_tasks,
-                                       distros=distros)
+                                       distros=distros, activate=False)
         else:
-            build_variant.add_tasks(fuzzer_task.sub_tasks, distros=distros)
+            build_variant.add_tasks(fuzzer_task.sub_tasks, distros=distros, activate=False)
         return fuzzer_task
 
     def generate_task(self, generated_suite: GeneratedSuite, build_variant: BuildVariant,
@@ -102,7 +102,7 @@ class GenTaskService:
         distros = self._get_distro(build_variant.name, gen_params.use_large_distro,
                                    gen_params.large_distro_name)
         build_variant.display_task(generated_suite.display_task_name(),
-                                   execution_tasks=execution_tasks, distros=distros)
+                                   execution_tasks=execution_tasks, distros=distros, activate=False)
 
     def generate_multiversion_task(self, generated_suite: GeneratedSuite,
                                    build_variant: BuildVariant,
@@ -121,7 +121,7 @@ class GenTaskService:
         distros = self._get_distro(build_variant.name, gen_params.use_large_distro,
                                    gen_params.large_distro_name)
         build_variant.display_task(generated_suite.display_task_name(),
-                                   execution_tasks=execution_tasks, distros=distros)
+                                   execution_tasks=execution_tasks, distros=distros, activate=False)
 
     def generate_multiversion_burnin_task(self, generated_suite: GeneratedSuite,
                                           gen_params: MultiversionGenTaskParams,
diff --git a/buildscripts/task_generation/task_types/fuzzer_tasks.py b/buildscripts/task_generation/task_types/fuzzer_tasks.py
index 883b8ca814c..9616dfbfaf5 100644
--- a/buildscripts/task_generation/task_types/fuzzer_tasks.py
+++ b/buildscripts/task_generation/task_types/fuzzer_tasks.py
@@ -1,11 +1,18 @@
 """Task generation for fuzzer tasks."""
-from typing import NamedTuple, Set, Optional, Dict
+from typing import NamedTuple, Set, Optional, Dict, List
 
 from shrub.v2 import Task, FunctionCall, TaskDependency
 
 from buildscripts.util import taskname
 
 
+def get_multiversion_resmoke_args(is_sharded: bool) -> str:
+    """Return resmoke args used to configure a cluster for multiversion testing."""
+    if is_sharded:
+        return "--numShards=2 --numReplSetNodes=2 "
+    return "--numReplSetNodes=3 --linearChain=on "
+
+
 class FuzzerTask(NamedTuple):
     """
     Evergreen configuration for a generated fuzzer command.
@@ -56,6 +63,8 @@ class FuzzerGenTaskParams(NamedTuple):
     large_distro_name: Optional[str]
     config_location: str
     add_to_display_task: bool = True
+    version_config: Optional[List[str]] = None
+    is_sharded: Optional[bool] = None
 
     def jstestfuzz_params(self) -> Dict[str, str]:
         """Build a dictionary of parameters to pass to jstestfuzz."""
@@ -64,6 +73,19 @@ class FuzzerGenTaskParams(NamedTuple):
             "npm_command": self.npm_command,
         }
 
+    def get_task_name(self, version: str) -> str:
+        """Get the name to use for generated tasks."""
+        if version:
+            return f"{self.suite}_multiversion_{version}"
+        return self.task_name
+
+    def get_resmoke_args(self) -> str:
+        """Get the resmoke arguments to use for generated tasks."""
+        if self.is_sharded is not None:
+            mv_args = get_multiversion_resmoke_args(self.is_sharded)
+            return f"{self.resmoke_args or ''} --mixedBinVersions={self.version_config} {mv_args}"
+        return self.resmoke_args
+
 
 class FuzzerGenTaskService:
     """A service for generating fuzzer tasks."""
@@ -75,30 +97,41 @@ class FuzzerGenTaskService:
         :param params: Parameters for how task should be generated.
         :return: Set of shrub tasks.
         """
-        sub_tasks = {self.build_fuzzer_sub_task(index, params) for index in range(params.num_tasks)}
-        return FuzzerTask(task_name=params.task_name, sub_tasks=sub_tasks)
+        version_list = params.version_config
+        if version_list is None:
+            version_list = [""]
+
+        sub_tasks = set()
+        for version in version_list:
+            sub_tasks = sub_tasks.union({
+                self.build_fuzzer_sub_task(index, params, version)
+                for index in range(params.num_tasks)
+            })
+
+        return FuzzerTask(task_name=params.get_task_name(""), sub_tasks=sub_tasks)
 
     @staticmethod
-    def build_fuzzer_sub_task(task_index: int, params: FuzzerGenTaskParams) -> Task:
+    def build_fuzzer_sub_task(task_index: int, params: FuzzerGenTaskParams, version: str) -> Task:
         """
         Build a shrub task to run the fuzzer.
 
         :param task_index: Index of sub task being generated.
         :param params: Parameters describing how tasks should be generated.
+        :param version: Multiversion version to generate against.
         :return: Shrub task to run the fuzzer.
         """
-        sub_task_name = taskname.name_generated_task(params.task_name, task_index, params.num_tasks,
-                                                     params.variant)
+        sub_task_name = taskname.name_generated_task(
+            params.get_task_name(version), task_index, params.num_tasks, params.variant)
 
         suite_arg = f"--suites={params.suite}"
         run_tests_vars = {
             "continue_on_failure": params.continue_on_failure,
-            "resmoke_args": f"{suite_arg} {params.resmoke_args}",
+            "resmoke_args": f"{suite_arg} {params.get_resmoke_args()}",
             "resmoke_jobs_max": params.resmoke_jobs_max,
             "should_shuffle": params.should_shuffle,
             "require_multiversion": params.require_multiversion,
             "timeout_secs": params.timeout_secs,
-            "task": params.task_name,
+            "task": params.get_task_name(version),
             "gen_task_config_location": params.config_location,
         }  # yapf: disable
 
diff --git a/buildscripts/tests/task_generation/task_types/test_fuzzer_tasks.py b/buildscripts/tests/task_generation/task_types/test_fuzzer_tasks.py
index 10f556e9311..246525d9415 100644
--- a/buildscripts/tests/task_generation/task_types/test_fuzzer_tasks.py
+++ b/buildscripts/tests/task_generation/task_types/test_fuzzer_tasks.py
@@ -7,7 +7,8 @@ import buildscripts.task_generation.task_types.fuzzer_tasks as under_test
 # pylint: disable=missing-docstring,invalid-name,unused-argument,no-self-use,protected-access
 
 
-def build_mock_fuzzer_params(multi_version=None, jstestfuzz_vars="vars for jstestfuzz"):
+def build_mock_fuzzer_params(multi_version=None, jstestfuzz_vars="vars for jstestfuzz",
+                             version_config=None, is_sharded=None):
     return under_test.FuzzerGenTaskParams(
         task_name="task name",
         variant="build variant",
@@ -26,6 +27,8 @@ def build_mock_fuzzer_params(multi_version=None, jstestfuzz_vars="vars for jstes
         add_to_display_task=True,
         large_distro_name="large distro",
         config_location="config_location",
+        version_config=version_config,
+        is_sharded=is_sharded,
     )
 
 
@@ -44,6 +47,28 @@ class TestFuzzerGenTaskParams(unittest.TestCase):
 
         self.assertNotIn("None", params.jstestfuzz_params()["jstestfuzz_vars"])
 
+    def test_get_task_name_with_no_version(self):
+        params = build_mock_fuzzer_params()
+
+        self.assertEqual(params.task_name, params.get_task_name(""))
+
+    def test_get_task_name_with_version(self):
+        params = build_mock_fuzzer_params()
+        expected_name = f"{params.suite}_multiversion_my_version"
+
+        self.assertEqual(expected_name, params.get_task_name("my_version"))
+
+    def test_get_non_sharded_resmoke_args(self):
+        params = build_mock_fuzzer_params()
+
+        self.assertEqual(params.resmoke_args, params.get_resmoke_args())
+
+    def test_get_sharded_resmoke_args(self):
+        params = build_mock_fuzzer_params(is_sharded=True)
+        expected_args = f"{params.resmoke_args} --mixedBinVersions=None --numShards=2 --numReplSetNodes=2"
+
+        self.assertEqual(expected_args, params.get_resmoke_args().strip())
+
 
 class TestGenerateTasks(unittest.TestCase):
     def test_fuzzer_tasks_are_generated(self):
@@ -55,13 +80,23 @@ class TestGenerateTasks(unittest.TestCase):
         self.assertEqual(fuzzer_task.task_name, mock_params.task_name)
         self.assertEqual(len(fuzzer_task.sub_tasks), mock_params.num_tasks)
 
+    def test_fuzzers_for_multiversion_are_generated(self):
+        version_list = ["version0", "version1"]
+        mock_params = build_mock_fuzzer_params(version_config=version_list)
+        fuzzer_service = under_test.FuzzerGenTaskService()
+
+        fuzzer_task = fuzzer_service.generate_tasks(mock_params)
+
+        self.assertEqual(fuzzer_task.task_name, mock_params.task_name)
+        self.assertEqual(len(fuzzer_task.sub_tasks), mock_params.num_tasks * len(version_list))
+
 
 class TestBuildFuzzerSubTask(unittest.TestCase):
     def test_sub_task_should_be_built_correct(self):
         mock_params = build_mock_fuzzer_params()
         fuzzer_service = under_test.FuzzerGenTaskService()
 
-        sub_task = fuzzer_service.build_fuzzer_sub_task(3, mock_params)
+        sub_task = fuzzer_service.build_fuzzer_sub_task(3, mock_params, "")
 
         self.assertEqual(sub_task.name, f"{mock_params.task_name}_3_{mock_params.variant}")
         self.assertEqual(len(sub_task.commands), 4)
@@ -70,7 +105,7 @@ class TestBuildFuzzerSubTask(unittest.TestCase):
         mock_params = build_mock_fuzzer_params(multi_version="multiversion value")
         fuzzer_service = under_test.FuzzerGenTaskService()
 
-        sub_task = fuzzer_service.build_fuzzer_sub_task(3, mock_params)
+        sub_task = fuzzer_service.build_fuzzer_sub_task(3, mock_params, "")
 
         self.assertEqual(sub_task.name, f"{mock_params.task_name}_3_{mock_params.variant}")
         self.assertEqual(len(sub_task.commands), 6)
diff --git a/buildscripts/tests/test_burn_in_tests_multiversion.py b/buildscripts/tests/test_burn_in_tests_multiversion.py
index 5d63fe76015..56aed5fc434 100644
--- a/buildscripts/tests/test_burn_in_tests_multiversion.py
+++ b/buildscripts/tests/test_burn_in_tests_multiversion.py
@@ -10,17 +10,16 @@ import unittest
 from mock import MagicMock, patch
 
 import inject
-from shrub.v2 import BuildVariant, ShrubProject
 from evergreen import EvergreenApi
 
 import buildscripts.burn_in_tests_multiversion as under_test
 from buildscripts.burn_in_tests import TaskInfo
 from buildscripts.ciconfig.evergreen import parse_evergreen_file, EvergreenProjectConfig
 import buildscripts.resmokelib.parser as _parser
-import buildscripts.evergreen_gen_multiversion_tests as gen_multiversion
-from buildscripts.evergreen_burn_in_tests import GenerateBurnInExecutor, EvergreenFileChangeDetector
-from buildscripts.evergreen_generate_resmoke_tasks import GENERATE_CONFIG_FILE
+from buildscripts.evergreen_burn_in_tests import EvergreenFileChangeDetector
 from buildscripts.task_generation.gen_config import GenerationConfiguration
+from buildscripts.task_generation.multiversion_util import REPL_MIXED_VERSION_CONFIGS, \
+    SHARDED_MIXED_VERSION_CONFIGS
 from buildscripts.task_generation.resmoke_proxy import ResmokeProxyConfig
 from buildscripts.task_generation.suite_split import SuiteSplitConfig
 from buildscripts.task_generation.suite_split_strategies import greedy_division, SplitStrategy, \
@@ -84,8 +83,8 @@ def create_multiversion_tests_by_task_mock(n_tasks, n_tests):
 
 _DATE = datetime(2018, 7, 15)
 BURN_IN_TESTS = "buildscripts.burn_in_tests"
-NUM_REPL_MIXED_VERSION_CONFIGS = len(gen_multiversion.REPL_MIXED_VERSION_CONFIGS)
-NUM_SHARDED_MIXED_VERSION_CONFIGS = len(gen_multiversion.SHARDED_MIXED_VERSION_CONFIGS)
+NUM_REPL_MIXED_VERSION_CONFIGS = len(REPL_MIXED_VERSION_CONFIGS)
+NUM_SHARDED_MIXED_VERSION_CONFIGS = len(SHARDED_MIXED_VERSION_CONFIGS)
 
 NS = "buildscripts.burn_in_tests_multiversion"
 
@@ -165,8 +164,7 @@ def configure_dependencies(evg_api, split_config):
         binder.bind(FallbackStrategy, round_robin_fallback)
         binder.bind(GenTaskOptions, gen_task_options)
         binder.bind(EvergreenApi, evg_api)
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(GENERATE_CONFIG_FILE))
+        binder.bind(GenerationConfiguration, GenerationConfiguration.from_yaml_file())
         binder.bind(ResmokeProxyConfig,
                     ResmokeProxyConfig(resmoke_suite_dir=under_test.DEFAULT_TEST_SUITE_DIR))
         binder.bind(EvergreenFileChangeDetector, None)
diff --git a/buildscripts/tests/test_evergreen_activate_gen_tasks.py b/buildscripts/tests/test_evergreen_activate_gen_tasks.py
new file mode 100644
index 00000000000..dbb64380838
--- /dev/null
+++ b/buildscripts/tests/test_evergreen_activate_gen_tasks.py
@@ -0,0 +1,42 @@
+"""Unit tests for the generate_resmoke_suite script."""
+import unittest
+
+from mock import MagicMock
+
+from buildscripts import evergreen_activate_gen_tasks as under_test
+
+# pylint: disable=missing-docstring,invalid-name,unused-argument,no-self-use,protected-access
+# pylint: disable=too-many-locals,too-many-lines,too-many-public-methods,no-value-for-parameter
+
+
+def build_mock_task(name, task_id):
+    mock_task = MagicMock(display_name=name, task_id=task_id)
+    return mock_task
+
+
+def build_mock_evg_api(mock_task_list):
+    mock_build = MagicMock()
+    mock_build.get_tasks.return_value = mock_task_list
+    mock_evg_api = MagicMock()
+    mock_evg_api.build_by_id.return_value = mock_build
+    return mock_evg_api
+
+
+class TestActivateTask(unittest.TestCase):
+    def test_task_with_display_name_is_activated(self):
+        n_tasks = 5
+        mock_task_list = [build_mock_task(f"task_{i}", f"id_{i}") for i in range(n_tasks)]
+        mock_evg_api = build_mock_evg_api(mock_task_list)
+
+        under_test.activate_task("build_id", "task_3", mock_evg_api)
+
+        mock_evg_api.configure_task.assert_called_with("id_3", activated=True)
+
+    def test_task_with_no_matching_name(self):
+        n_tasks = 5
+        mock_task_list = [build_mock_task(f"task_{i}", f"id_{i}") for i in range(n_tasks)]
+        mock_evg_api = build_mock_evg_api(mock_task_list)
+
+        under_test.activate_task("build_id", "not_an_existing_task", mock_evg_api)
+
+        mock_evg_api.configure_task.assert_not_called()
diff --git a/buildscripts/tests/test_evergreen_gen_build_variant.py b/buildscripts/tests/test_evergreen_gen_build_variant.py
new file mode 100644
index 00000000000..3204c63db83
--- /dev/null
+++ b/buildscripts/tests/test_evergreen_gen_build_variant.py
@@ -0,0 +1,317 @@
+"""Unit tests for the generate_resmoke_suite script."""
+from datetime import datetime, timedelta
+import json
+import os
+from tempfile import TemporaryDirectory
+import sys
+import unittest
+
+import inject
+import requests
+import yaml
+from mock import patch, MagicMock
+from evergreen import EvergreenApi
+
+from buildscripts import evergreen_gen_build_variant as under_test
+from buildscripts.ciconfig.evergreen import Variant, Task, EvergreenProjectConfig
+from buildscripts.evergreen_gen_build_variant import EvgExpansions
+from buildscripts.task_generation.gen_config import GenerationConfiguration
+from buildscripts.task_generation.resmoke_proxy import ResmokeProxyConfig
+from buildscripts.task_generation.suite_split import SuiteSplitConfig
+from buildscripts.task_generation.suite_split_strategies import SplitStrategy, FallbackStrategy, \
+    greedy_division, round_robin_fallback
+from buildscripts.task_generation.task_types.gentask_options import GenTaskOptions
+
+# pylint: disable=missing-docstring,invalid-name,unused-argument,no-self-use,protected-access
+# pylint: disable=too-many-locals,too-many-lines,too-many-public-methods,no-value-for-parameter
+
+
+def build_mock_build_variant(expansions=None, task_list=None):
+    task_spec_list = [{"name": task.name} for task in task_list] if task_list else []
+    config = {
+        "tasks": task_spec_list,
+    }
+    if expansions:
+        config["expansions"] = expansions
+
+    if task_list is None:
+        task_list = []
+    task_map = {task.name: task for task in task_list}
+
+    return Variant(config, task_map, {})
+
+
+def build_mock_task(name, run_cmd, run_vars=None):
+    config = {
+        "name":
+            name, "commands": [
+                {"func": "do setup"},
+                {
+                    "func": run_cmd,
+                    "vars": run_vars if run_vars else {},
+                },
+            ]
+    }
+    return Task(config)
+
+
+def build_mock_project_config(variant=None, task_defs=None):
+    mock_project = MagicMock()
+    if variant:
+        mock_project.get_variant.return_value = variant
+
+    if task_defs:
+        mock_project.get_task.side_effect = task_defs
+
+    return mock_project
+
+
+def build_mock_expansions():
+    mock_expansions = MagicMock()
+    mock_expansions.config_location.return_value = "/path/to/config"
+    return mock_expansions
+
+
+def build_mock_evg_api(build_task_list):
+    mock_evg_api = MagicMock()
+    mock_evg_api.build_by_id.return_value.get_tasks.return_value = build_task_list
+    return mock_evg_api
+
+
+def build_mock_orchestrator(build_expansions=None, task_def_list=None, build_task_list=None):
+    if build_expansions is None:
+        build_expansions = {}
+    if task_def_list is None:
+        task_def_list = []
+    if build_task_list is None:
+        build_task_list = []
+
+    mock_build_variant = build_mock_build_variant(build_expansions, task_def_list)
+    mock_project = build_mock_project_config(mock_build_variant, task_def_list)
+    mock_evg_expansions = build_mock_expansions()
+    mock_evg_api = build_mock_evg_api(build_task_list)
+
+    return under_test.GenerateBuildVariantOrchestrator(
+        gen_task_validation=MagicMock(),
+        gen_task_options=MagicMock(),
+        evg_project_config=mock_project,
+        evg_expansions=mock_evg_expansions,
+        multiversion_util=MagicMock(),
+        evg_api=mock_evg_api,
+    )
+
+
+class TestTranslateRunVar(unittest.TestCase):
+    def test_normal_value_should_be_returned(self):
+        run_var = "some value"
+        mock_build_variant = build_mock_build_variant()
+        self.assertEqual(run_var, under_test.translate_run_var(run_var, mock_build_variant))
+
+    def test_expansion_should_be_returned_from_build_variant(self):
+        run_var = "${my_expansion}"
+        value = "my value"
+        mock_build_variant = build_mock_build_variant(expansions={"my_expansion": value})
+        self.assertEqual(value, under_test.translate_run_var(run_var, mock_build_variant))
+
+    def test_expansion_not_found_should_return_none(self):
+        run_var = "${my_expansion}"
+        mock_build_variant = build_mock_build_variant(expansions={})
+        self.assertIsNone(under_test.translate_run_var(run_var, mock_build_variant))
+
+    def test_expansion_not_found_should_return_default(self):
+        run_var = "${my_expansion|default}"
+        mock_build_variant = build_mock_build_variant(expansions={})
+        self.assertEqual("default", under_test.translate_run_var(run_var, mock_build_variant))
+
+    def test_expansion_should_be_returned_from_build_variant_even_with_default(self):
+        run_var = "${my_expansion|default}"
+        value = "my value"
+        mock_build_variant = build_mock_build_variant(expansions={"my_expansion": value})
+        self.assertEqual(value, under_test.translate_run_var(run_var, mock_build_variant))
+
+
+class TestTaskDefToSplitParams(unittest.TestCase):
+    def test_params_should_be_generated(self):
+        run_vars = {
+            "resmoke_args": "run tests",
+        }
+        mock_task_def = build_mock_task("my_task", "generate resmoke tasks", run_vars)
+        mock_orchestrator = build_mock_orchestrator(task_def_list=[mock_task_def])
+
+        split_param = mock_orchestrator.task_def_to_split_params(mock_task_def, "build_variant")
+
+        self.assertEqual("build_variant", split_param.build_variant)
+        self.assertEqual("my_task", split_param.task_name)
+        self.assertEqual("my_task", split_param.suite_name)
+        self.assertEqual("my_task", split_param.filename)
+
+    def test_params_should_allow_suite_to_be_overridden(self):
+        run_vars = {
+            "resmoke_args": "run tests",
+            "suite": "the suite",
+        }
+        mock_task_def = build_mock_task("my_task", "generate resmoke tasks", run_vars)
+        mock_orchestrator = build_mock_orchestrator(task_def_list=[mock_task_def])
+
+        split_param = mock_orchestrator.task_def_to_split_params(mock_task_def, "build_variant")
+
+        self.assertEqual("build_variant", split_param.build_variant)
+        self.assertEqual("my_task", split_param.task_name)
+        self.assertEqual("the suite", split_param.suite_name)
+        self.assertEqual("the suite", split_param.filename)
+
+
+class TestTaskDefToGenParams(unittest.TestCase):
+    def test_params_should_be_generated(self):
+        run_vars = {
+            "resmoke_args": "run tests",
+        }
+        mock_task_def = build_mock_task("my_task", "generate resmoke tasks", run_vars)
+        mock_orchestrator = build_mock_orchestrator(task_def_list=[mock_task_def])
+
+        gen_params = mock_orchestrator.task_def_to_gen_params(mock_task_def, "build_variant")
+
+        self.assertIsNone(gen_params.require_multiversion)
+        self.assertEqual("run tests", gen_params.resmoke_args)
+        self.assertEqual(mock_orchestrator.evg_expansions.config_location.return_value,
+                         gen_params.config_location)
+        self.assertIsNone(gen_params.large_distro_name)
+        self.assertFalse(gen_params.use_large_distro)
+
+    def test_params_should_be_overwritable(self):
+        run_vars = {
+            "resmoke_args": "run tests",
+            "use_large_distro": "true",
+            "require_multiversion": True,
+        }
+        mock_task_def = build_mock_task("my_task", "generate resmoke tasks", run_vars)
+        build_expansions = {"large_distro_name": "my large distro"}
+        mock_orchestrator = build_mock_orchestrator(build_expansions=build_expansions,
+                                                    task_def_list=[mock_task_def])
+        gen_params = mock_orchestrator.task_def_to_gen_params(mock_task_def, "build_variant")
+
+        self.assertTrue(gen_params.require_multiversion)
+        self.assertEqual("run tests", gen_params.resmoke_args)
+        self.assertEqual(mock_orchestrator.evg_expansions.config_location.return_value,
+                         gen_params.config_location)
+        self.assertEqual("my large distro", gen_params.large_distro_name)
+        self.assertTrue(gen_params.use_large_distro)
+
+
+class TestTaskDefToFuzzerParams(unittest.TestCase):
+    def test_params_should_be_generated(self):
+        run_vars = {
+            "name": "my_fuzzer",
+            "num_files": "5",
+            "num_tasks": "3",
+        }
+        mock_task_def = build_mock_task("my_task", "generate fuzzer tasks", run_vars)
+        mock_orchestrator = build_mock_orchestrator(task_def_list=[mock_task_def])
+        fuzzer_params = mock_orchestrator.task_def_to_fuzzer_params(mock_task_def, "build_variant")
+
+        self.assertEqual("my_fuzzer", fuzzer_params.task_name)
+        self.assertEqual(5, fuzzer_params.num_files)
+        self.assertEqual(3, fuzzer_params.num_tasks)
+        self.assertEqual("jstestfuzz", fuzzer_params.npm_command)
+        self.assertEqual(mock_orchestrator.evg_expansions.config_location.return_value,
+                         fuzzer_params.config_location)
+        self.assertIsNone(fuzzer_params.large_distro_name)
+        self.assertFalse(fuzzer_params.use_large_distro)
+
+    def test_params_should_be_overwritable(self):
+        run_vars = {
+            "name": "my_fuzzer",
+            "num_files": "${file_count|8}",
+            "num_tasks": "3",
+            "use_large_distro": "true",
+            "npm_command": "aggfuzzer",
+        }
+        mock_task_def = build_mock_task("my_task", "generate fuzzer tasks", run_vars)
+        build_expansions = {"large_distro_name": "my large distro"}
+        mock_orchestrator = build_mock_orchestrator(build_expansions=build_expansions,
+                                                    task_def_list=[mock_task_def])
+
+        fuzzer_params = mock_orchestrator.task_def_to_fuzzer_params(mock_task_def, "build_variant")
+
+        self.assertEqual("my_fuzzer", fuzzer_params.task_name)
+        self.assertEqual(8, fuzzer_params.num_files)
+        self.assertEqual(3, fuzzer_params.num_tasks)
+        self.assertEqual("aggfuzzer", fuzzer_params.npm_command)
+        self.assertEqual(mock_orchestrator.evg_expansions.config_location.return_value,
+                         fuzzer_params.config_location)
+        self.assertEqual("my large distro", fuzzer_params.large_distro_name)
+        self.assertTrue(fuzzer_params.use_large_distro)
+
+
+class TestGenerateBuildVariant(unittest.TestCase):
+    def test_a_whole_build_variant(self):
+        gen_run_vars = {
+            "resmoke_args": "run tests",
+        }
+        mv_gen_run_vars = {"resmoke_args": "run tests", "suite": "multiversion suite"}
+        fuzz_run_vars = {
+            "name": "my_fuzzer",
+            "num_files": "5",
+            "num_tasks": "3",
+        }
+        mv_fuzz_run_vars = {
+            "name": "my_fuzzer",
+            "num_files": "5",
+            "num_tasks": "3",
+            "is_jstestfuzz": "True",
+            "suite": "aggfuzzer",
+        }
+        mock_task_defs = [
+            build_mock_task("my_gen_task", "generate resmoke tasks", gen_run_vars),
+            build_mock_task("my_fuzzer_task", "generate fuzzer tasks", fuzz_run_vars),
+            build_mock_task("my_mv_fuzzer_task", "generate implicit multiversion tasks",
+                            mv_fuzz_run_vars),
+            build_mock_task("my_mv_gen_task", "generate implicit multiversion tasks",
+                            mv_gen_run_vars),
+        ]
+        mock_orchestrator = build_mock_orchestrator(task_def_list=mock_task_defs)
+        builder = MagicMock()
+
+        builder = mock_orchestrator.generate_build_variant(builder, "build variant")
+
+        self.assertEqual(builder.generate_suite.call_count, 1)
+        self.assertEqual(builder.generate_fuzzer.call_count, 2)
+        self.assertEqual(builder.add_multiversion_suite.call_count, 1)
+
+
+class TestAdjustTaskPriority(unittest.TestCase):
+    def test_task_is_updates(self):
+        starting_priority = 42
+        task_id = "task 314"
+        mock_task = MagicMock(task_id=task_id, priority=starting_priority)
+        mock_orchestrator = build_mock_orchestrator()
+
+        mock_orchestrator.adjust_task_priority(mock_task)
+
+        mock_orchestrator.evg_api.configure_task.assert_called_with(task_id,
+                                                                    priority=starting_priority + 1)
+
+    def test_task_should_only_reach_99(self):
+        starting_priority = 99
+        task_id = "task 314"
+        mock_task = MagicMock(task_id=task_id, priority=starting_priority)
+        mock_orchestrator = build_mock_orchestrator()
+
+        mock_orchestrator.adjust_task_priority(mock_task)
+
+        mock_orchestrator.evg_api.configure_task.assert_called_with(task_id,
+                                                                    priority=starting_priority)
+
+
+class TestAdjustGenTasksPriority(unittest.TestCase):
+    def test_gen_tasks_in_task_list_are_adjusted(self):
+        gen_tasks = {"task_3", "task_8", "task_13"}
+        n_build_tasks = 25
+        mock_task_list = [
+            MagicMock(display_name=f"task_{i}", priority=0) for i in range(n_build_tasks)
+        ]
+        mock_orchestrator = build_mock_orchestrator(build_task_list=mock_task_list)
+
+        mock_orchestrator.adjust_gen_tasks_priority(gen_tasks)
+
+        self.assertEqual(len(gen_tasks), mock_orchestrator.evg_api.configure_task.call_count)
diff --git a/buildscripts/tests/test_evergreen_gen_multiversion_tests.py b/buildscripts/tests/test_evergreen_gen_multiversion_tests.py
index 621d13978dd..9b7c666f623 100644
--- a/buildscripts/tests/test_evergreen_gen_multiversion_tests.py
+++ b/buildscripts/tests/test_evergreen_gen_multiversion_tests.py
@@ -2,13 +2,12 @@
 
 import os
 import unittest
-from tempfile import TemporaryDirectory, NamedTemporaryFile
+from tempfile import TemporaryDirectory
 
 from mock import patch, MagicMock
 from click.testing import CliRunner
 
 from buildscripts import evergreen_gen_multiversion_tests as under_test
-import buildscripts.evergreen_generate_resmoke_tasks as generate_resmoke
 from buildscripts.util.fileops import read_yaml_file
 
 # pylint: disable=missing-docstring, no-self-use
diff --git a/buildscripts/tests/test_evergreen_generate_resmoke_tasks.py b/buildscripts/tests/test_evergreen_generate_resmoke_tasks.py
deleted file mode 100644
index 6cf64389b34..00000000000
--- a/buildscripts/tests/test_evergreen_generate_resmoke_tasks.py
+++ /dev/null
@@ -1,232 +0,0 @@
-"""Unit tests for the generate_resmoke_suite script."""
-from datetime import datetime, timedelta
-import json
-import os
-from tempfile import TemporaryDirectory
-import sys
-import unittest
-
-import inject
-import requests
-import yaml
-from mock import patch, MagicMock
-from evergreen import EvergreenApi
-
-from buildscripts import evergreen_generate_resmoke_tasks as under_test
-from buildscripts.task_generation.gen_config import GenerationConfiguration
-from buildscripts.task_generation.resmoke_proxy import ResmokeProxyConfig
-from buildscripts.task_generation.suite_split import SuiteSplitConfig
-from buildscripts.task_generation.suite_split_strategies import SplitStrategy, FallbackStrategy, \
-    greedy_division, round_robin_fallback
-from buildscripts.task_generation.task_types.gentask_options import GenTaskOptions
-
-# pylint: disable=missing-docstring,invalid-name,unused-argument,no-self-use,protected-access
-# pylint: disable=too-many-locals,too-many-lines,too-many-public-methods,no-value-for-parameter
-
-
-def tst_stat_mock(file, duration, pass_count):
-    return MagicMock(test_file=file, avg_duration_pass=duration, num_pass=pass_count)
-
-
-def mock_test_stats_unavailable(evg_api_mock):
-    response = MagicMock(status_code=requests.codes.SERVICE_UNAVAILABLE)
-    evg_api_mock.test_stats_by_project.side_effect = requests.HTTPError(response=response)
-    return evg_api_mock
-
-
-def mock_resmoke_config_file(test_list, filename):
-    config = {
-        "test_kind": "js_test",
-        "selector": {
-            "roots": test_list,
-        },
-        "executor": {
-            "config": {
-                "shell_options": {
-                    "global_vars": {
-                        "TestData": {
-                            "roleGraphInvalidationIsFatal": True,
-                        }
-                    },
-                    "readMode": "commands",
-                }
-            }
-        }
-    }  # yapf: disable
-
-    with open(filename, "w") as fileh:
-        fileh.write(yaml.safe_dump(config))
-
-
-def configure_dependencies(evg_api, evg_expansions, config_dir,
-                           test_suites_dir=under_test.DEFAULT_TEST_SUITE_DIR):
-    start_date = datetime.utcnow()
-    end_date = start_date - timedelta(weeks=2)
-
-    def dependencies(binder: inject.Binder) -> None:
-        binder.bind(SuiteSplitConfig, evg_expansions.get_suite_split_config(start_date, end_date))
-        binder.bind(SplitStrategy, greedy_division)
-        binder.bind(FallbackStrategy, round_robin_fallback)
-        binder.bind(GenTaskOptions, evg_expansions.get_evg_config_gen_options(config_dir))
-        binder.bind(EvergreenApi, evg_api)
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(under_test.GENERATE_CONFIG_FILE))
-        binder.bind(ResmokeProxyConfig, ResmokeProxyConfig(resmoke_suite_dir=test_suites_dir))
-
-    inject.clear_and_configure(dependencies)
-
-
-def build_mock_evg_expansions(target_resmoke_time=under_test.DEFAULT_TARGET_RESMOKE_TIME):
-    return under_test.EvgExpansions(
-        build_variant="build_variant",
-        max_sub_suites=100,
-        project="mongodb-mongo-master",
-        task_id="task314",
-        task_name="some_task_gen",
-        target_resmoke_time=target_resmoke_time,
-        build_id="build_id",
-        revision="abc123",
-    )
-
-
-class TestAcceptance(unittest.TestCase):
-    """A suite of Acceptance tests for evergreen_generate_resmoke_tasks."""
-
-    @staticmethod
-    def _mock_evg_api(successful_task=False):
-        evg_api_mock = MagicMock()
-        task_mock = evg_api_mock.task_by_id.return_value
-        task_mock.execution = 0
-        if successful_task:
-            task_mock.execution = 1
-            task_mock.get_execution.return_value.is_success.return_value = True
-
-        return evg_api_mock
-
-    @staticmethod
-    def _prep_dirs(tmpdir):
-        target_directory = os.path.join(tmpdir, "output")
-        source_directory = os.path.join(tmpdir, "input")
-        os.makedirs(source_directory)
-
-        return target_directory, source_directory
-
-    @staticmethod
-    def _mock_test_files(directory, n_tests, runtime, evg_api_mock, suites_config_mock):
-        test_list = [os.path.join(directory, f"test_name_{i}.js") for i in range(n_tests)]
-        mock_test_stats = [tst_stat_mock(file, runtime, 5) for file in test_list]
-        evg_api_mock.test_stats_by_project.return_value = mock_test_stats
-        suites_config_mock.return_value.tests = test_list
-        for test in test_list:
-            open(test, "w").close()
-
-        return test_list
-
-    def test_when_task_has_already_run_successfully(self):
-        """
-        Given evergreen_generate_resmoke_tasks has already been run successfully by this task,
-        When it attempts to run again,
-        It does not generate any files.
-        """
-        mock_evg_api = self._mock_evg_api(successful_task=True)
-        mock_evg_expansions = build_mock_evg_expansions()
-
-        with TemporaryDirectory() as tmpdir:
-            configure_dependencies(mock_evg_api, mock_evg_expansions, tmpdir)
-
-            orchestrator = under_test.EvgGenResmokeTaskOrchestrator()
-            orchestrator.generate_task(mock_evg_expansions.task_id,
-                                       mock_evg_expansions.get_suite_split_params(),
-                                       mock_evg_expansions.get_gen_params())
-
-            self.assertEqual(0, len(os.listdir(tmpdir)))
-
-    @patch("buildscripts.resmokelib.suitesconfig.get_suite")
-    def test_when_evg_test_stats_is_down(self, suites_config_mock):
-        """
-        Given Evergreen historic test stats endpoint is disabled,
-        When evergreen_generate_resmoke_tasks attempts to generate suites,
-        It generates suites based on "fallback_num_sub_suites".
-        """
-        n_tests = 100
-        mock_evg_api = mock_test_stats_unavailable(self._mock_evg_api())
-        mock_evg_expansions = build_mock_evg_expansions()
-        task = mock_evg_expansions.task_name[:-4]
-
-        with TemporaryDirectory() as tmpdir:
-            target_directory, source_directory = self._prep_dirs(tmpdir)
-            configure_dependencies(mock_evg_api, mock_evg_expansions, target_directory,
-                                   source_directory)
-
-            suite_path = os.path.join(source_directory, task)
-            test_list = self._mock_test_files(source_directory, n_tests, 5, mock_evg_api,
-                                              suites_config_mock)
-            mock_resmoke_config_file(test_list, suite_path + ".yml")
-
-            orchestrator = under_test.EvgGenResmokeTaskOrchestrator()
-            orchestrator.generate_task(mock_evg_expansions.task_id,
-                                       mock_evg_expansions.get_suite_split_params(),
-                                       mock_evg_expansions.get_gen_params())
-
-            # Were all the config files created? There should be one for each suite as well as
-            # the evergreen json config.
-            generated_files = os.listdir(target_directory)
-            # The expected suite count is the number of fallback suites + the _misc suite.
-            expected_suite_count = mock_evg_expansions.max_sub_suites + 1
-            # We expect files for all the suites + the evergreen json config.
-            self.assertEqual(expected_suite_count + 1, len(generated_files))
-
-            # Taking a closer look at the evergreen json config.
-            expected_shrub_file = f"{task}.json"
-            self.assertIn(expected_shrub_file, generated_files)
-            with open(os.path.join(target_directory, expected_shrub_file)) as fileh:
-                shrub_config = json.load(fileh)
-
-                # Is there a task in the config for all the suites we created?
-                self.assertEqual(expected_suite_count, len(shrub_config["tasks"]))
-
-    @unittest.skipIf(
-        sys.platform.startswith("win"), "Since this test is messing with directories, "
-        "windows does not handle test generation correctly")
-    @patch("buildscripts.resmokelib.suitesconfig.get_suite")
-    def test_with_each_test_in_own_task(self, suites_config_mock):
-        """
-        Given a task with all tests having a historic runtime over the target,
-        When evergreen_generate_resmoke_tasks attempts to generate suites,
-        It generates a suite for each test.
-        """
-        n_tests = 4
-        mock_evg_api = self._mock_evg_api()
-        mock_evg_expansions = build_mock_evg_expansions(target_resmoke_time=10)
-        task = mock_evg_expansions.task_name[:-4]
-
-        with TemporaryDirectory() as tmpdir:
-            target_directory, source_directory = self._prep_dirs(tmpdir)
-            configure_dependencies(mock_evg_api, mock_evg_expansions, target_directory,
-                                   source_directory)
-            suite_path = os.path.join(source_directory, task)
-            test_list = self._mock_test_files(source_directory, n_tests, 15 * 60, mock_evg_api,
-                                              suites_config_mock)
-            mock_resmoke_config_file(test_list, suite_path + ".yml")
-
-            orchestrator = under_test.EvgGenResmokeTaskOrchestrator()
-            orchestrator.generate_task(mock_evg_expansions.task_id,
-                                       mock_evg_expansions.get_suite_split_params(),
-                                       mock_evg_expansions.get_gen_params())
-
-            # Were all the config files created? There should be one for each suite as well as
-            # the evergreen json config.
-            generated_files = os.listdir(target_directory)
-            # The expected suite count is the number of tests + the _misc suite.
-            expected_suite_count = n_tests + 1
-            # We expect files for all the suites + the evergreen json config.
-            self.assertEqual(expected_suite_count + 1, len(generated_files))
-
-            # Taking a closer look at the evergreen json config.
-            expected_shrub_file = f"{task}.json"
-            self.assertIn(expected_shrub_file, generated_files)
-            with open(os.path.join(target_directory, expected_shrub_file)) as fileh:
-                shrub_config = json.load(fileh)
-
-                # Is there a task in the config for all the suites we created?
-                self.assertEqual(expected_suite_count, len(shrub_config["tasks"]))
diff --git a/buildscripts/tests/test_selected_tests.py b/buildscripts/tests/test_selected_tests.py
index 9d8efdeb4aa..cd774444d34 100644
--- a/buildscripts/tests/test_selected_tests.py
+++ b/buildscripts/tests/test_selected_tests.py
@@ -58,8 +58,7 @@ def configure_dependencies(evg_api, evg_expansions, evg_project_config, selected
         binder.bind(FallbackStrategy, round_robin_fallback)
         binder.bind(GenTaskOptions, evg_expansions.build_gen_task_options())
         binder.bind(EvergreenApi, evg_api)
-        binder.bind(GenerationConfiguration,
-                    GenerationConfiguration.from_yaml_file(under_test.GENERATE_CONFIG_FILE))
+        binder.bind(GenerationConfiguration, GenerationConfiguration.from_yaml_file())
         binder.bind(ResmokeProxyConfig, ResmokeProxyConfig(resmoke_suite_dir=test_suites_dir))
         binder.bind(SelectedTestsClient, selected_test_client)
 
diff --git a/etc/evergreen.yml b/etc/evergreen.yml
index ac3e303e062..11da60e9c4e 100644
--- a/etc/evergreen.yml
+++ b/etc/evergreen.yml
@@ -94,6 +94,16 @@ variables:
       resmoke_args: --help
       resmoke_jobs_max: 0  # No cap on number of jobs.
 
+- &gen_task_template
+  name: gen_task_template
+  depends_on:
+    - name: build_variant_gen
+    - name: archive_dist_test
+  commands:
+    - func: "generate resmoke tasks"
+      vars:
+        resmoke_args: --help
+
 - &benchmark_template
   name: benchmark_template
   depends_on:
@@ -147,7 +157,9 @@ variables:
 - &jstestfuzz_template
   name: jstestfuzz_template
   exec_timeout_secs: 14400 # Time out the task if it runs for more than 4 hours.
-  depends_on: []
+  depends_on:
+  - build_variant_gen
+  - archive_dist_test
   commands:
   - func: "generate fuzzer tasks"
 
@@ -259,6 +271,7 @@ variables:
   - name: compile_test_and_package_serial_TG
     distros:
     - windows-vsCurrent-large
+  - name: build_variant_gen
   - name: burn_in_tests_gen
   - name: .aggfuzzer .common
   - name: audit
@@ -991,7 +1004,7 @@ functions:
         files:
           - src/generated_resmoke_config/*.json
 
-  "generate burn in tags":
+  "generate build variant":
     - *f_expansions_write
     - *configure_evergreen_api_credentials
     - command: subprocess.exec
@@ -999,88 +1012,66 @@ functions:
       params:
         binary: bash
         args:
-          - "./src/evergreen/burn_in_tests_generate.sh"
+          - "./src/evergreen/generate_build_variant.sh"
     - command: archive.targz_pack
       params:
-        target: burn_in_tags_gen.tgz
-        source_dir: src/generated_burn_in_tags_config
+        target: generate_tasks_config.tgz
+        source_dir: src/generated_resmoke_config
         include:
           - "*"
     - command: s3.put
       params:
         aws_key: ${aws_key}
         aws_secret: ${aws_secret}
-        local_file: burn_in_tags_gen.tgz
-        remote_file: ${project}/${build_variant}/${revision}/burn_in_tags_gen/burn_in_tags_gen-${build_id}.tgz
+        local_file: generate_tasks_config.tgz
+        remote_file: ${project}/${build_variant}/${revision}/generate_tasks/${task_name}-${build_id}.tgz
         bucket: mciuploads
         permissions: public-read
-        content_type: application/gzip
-        display_name: Burn_in_tags Task Config - Execution ${execution}
+        content_type: ${content_type|application/gzip}
+        display_name: Generated Task Config - Execution ${execution}
+        optional: true
     - command: generate.tasks
       params:
+        optional: true
         files:
-          - src/generated_burn_in_tags_config/burn_in_tags_gen.json
+          - src/generated_resmoke_config/*.json
 
-  "generate randomized multiversion tasks":
-    - command: manifest.load
-    - *git_get_project
+  "generate burn in tags":
     - *f_expansions_write
     - *kill_processes
     - *cleanup_environment
     - *set_up_venv
     - *upload_pip_requirements
     - *configure_evergreen_api_credentials
-    - *f_expansions_write
-
     - command: subprocess.exec
       type: test
       params:
         binary: bash
         args:
-          - "./src/evergreen/randomized_multiversion_tasks_generate.sh"
-
-    - *do_multiversion_setup
-    - command: subprocess.exec
-      params:
-        binary: bash
-        args:
-          - "./src/evergreen/randomized_multiversion_tasks_generate_exclude_tags.sh"
+          - "./src/evergreen/burn_in_tests_generate.sh"
     - command: archive.targz_pack
       params:
-        target: generate_tasks_config.tgz
-        source_dir: src/generated_resmoke_config
-        optional: true
+        target: burn_in_tags_gen.tgz
+        source_dir: src/generated_burn_in_tags_config
         include:
           - "*"
-
     - command: s3.put
       params:
         aws_key: ${aws_key}
         aws_secret: ${aws_secret}
-        local_file: generate_tasks_config.tgz
-        remote_file: ${project}/${build_variant}/${revision}/generate_tasks/${task_name}-${build_id}.tgz
+        local_file: burn_in_tags_gen.tgz
+        remote_file: ${project}/${build_variant}/${revision}/burn_in_tags_gen/burn_in_tags_gen-${build_id}.tgz
         bucket: mciuploads
         permissions: public-read
         content_type: application/gzip
-        display_name: Generated Task Config - Execution ${execution}
-        optional: true
-
-    - command: timeout.update
-      params:
-        exec_timeout_secs: 10800  # 3 hours
-        timeout_secs: 10800  # 3 hours
-
-    - *f_expansions_write
-
+        display_name: Burn_in_tags Task Config - Execution ${execution}
     - command: generate.tasks
       params:
-        optional: true
         files:
-          - src/generated_resmoke_config/*.json
+          - src/generated_burn_in_tags_config/burn_in_tags_gen.json
 
-  "generate resmoke tasks":
-    - command: manifest.load
-    - *git_get_project
+  "generate randomized multiversion tasks":
+    - *fetch_artifacts
     - *f_expansions_write
     - *kill_processes
     - *cleanup_environment
@@ -1094,39 +1085,24 @@ functions:
       params:
         binary: bash
         args:
-          - "./src/evergreen/resmoke_tasks_generate.sh"
-
-    - command: archive.targz_pack
-      params:
-        target: generate_tasks_config.tgz
-        source_dir: src/generated_resmoke_config
-        include:
-          - "*"
-
-    - command: s3.put
-      params:
-        aws_key: ${aws_key}
-        aws_secret: ${aws_secret}
-        local_file: generate_tasks_config.tgz
-        remote_file: ${project}/${build_variant}/${revision}/generate_tasks/${task_name}-${build_id}.tgz
-        bucket: mciuploads
-        permissions: public-read
-        content_type: application/gzip
-        display_name: Generated Task Config - Execution ${execution}
-        optional: true
-
-    - command: timeout.update
-      params:
-        exec_timeout_secs: 10800  # 3 hours
-        timeout_secs: 10800  # 3 hours
+          - "./src/evergreen/gen_tasks_activate.sh"
 
+  "generate resmoke tasks":
+    - *fetch_artifacts
     - *f_expansions_write
+    - *kill_processes
+    - *cleanup_environment
+    - *set_up_venv
+    - *upload_pip_requirements
+    - *f_expansions_write
+    - *configure_evergreen_api_credentials
 
-    - command: generate.tasks
+    - command: subprocess.exec
+      type: test
       params:
-        optional: true
-        files:
-          - src/generated_resmoke_config/*.json
+        binary: bash
+        args:
+          - "./src/evergreen/gen_tasks_activate.sh"
 
   # Used by generator
   "run generated tests":
@@ -1149,6 +1125,11 @@ functions:
   - *determine_resmoke_jobs
   - *update_resmoke_jobs_expansions
   - *f_expansions_write
+  - command: subprocess.exec
+    params:
+      binary: bash
+      args:
+        - "./src/evergreen/implicit_multiversions_tasks_generate.sh"
   - *execute_resmoke_tests
     # The existence of the "run_tests_infrastructure_failure" file indicates this failure isn't
     # directly actionable. We use type=setup rather than type=system or type=test for this command
@@ -1277,8 +1258,7 @@ functions:
 
 
   "generate explicit multiversion tasks":
-    - command: manifest.load
-    - *git_get_project
+    - *fetch_artifacts
     - *f_expansions_write
     - *kill_processes
     - *cleanup_environment
@@ -1286,146 +1266,47 @@ functions:
     - *upload_pip_requirements
     - *f_expansions_write
     - *configure_evergreen_api_credentials
-    - *do_multiversion_setup
 
     - command: subprocess.exec
       type: test
       params:
         binary: bash
         args:
-          - "./src/evergreen/explicit_multiversion_tasks_generate.sh"
-
-    - command: archive.targz_pack
-      params:
-        target: generate_tasks_config.tgz
-        source_dir: src/generated_resmoke_config
-        include:
-          - "*"
-
-    - command: s3.put
-      params:
-        aws_key: ${aws_key}
-        aws_secret: ${aws_secret}
-        local_file: generate_tasks_config.tgz
-        remote_file: ${project}/${build_variant}/${revision}/generate_tasks/${task_name}-${build_id}.tgz
-        bucket: mciuploads
-        permissions: public-read
-        content_type: application/gzip
-        display_name: Generated Task Config - Execution ${execution}
-        optional: true
-
-    - command: timeout.update
-      params:
-        exec_timeout_secs: 10800  # 3 hours
-        timeout_secs: 10800  # 3 hours
-
-    - *f_expansions_write
-
-    - command: generate.tasks
-      params:
-        optional: true
-        files:
-          - src/generated_resmoke_config/*.json
+          - "./src/evergreen/gen_tasks_activate.sh"
 
   "generate implicit multiversion tasks":
-    - command: manifest.load
-    - *git_get_project
+    - *fetch_artifacts
     - *f_expansions_write
     - *kill_processes
     - *cleanup_environment
     - *set_up_venv
-    - *configure_evergreen_api_credentials
+    - *upload_pip_requirements
     - *f_expansions_write
-    - *do_multiversion_setup
+    - *configure_evergreen_api_credentials
 
-    - *f_expansions_write
     - command: subprocess.exec
+      type: test
       params:
         binary: bash
         args:
-          - "./src/evergreen/implicit_multiversions_tasks_generate.sh"
-
-    - command: archive.targz_pack
-      params:
-        target: generate_tasks_config.tgz
-        source_dir: src/generated_resmoke_config
-        include:
-          - "*"
-
-    - command: s3.put
-      params:
-        aws_key: ${aws_key}
-        aws_secret: ${aws_secret}
-        local_file: generate_tasks_config.tgz
-        remote_file: ${project}/${build_variant}/${revision}/generate_tasks/${task_name}-${build_id}.tgz
-        bucket: mciuploads
-        permissions: public-read
-        content_type: application/gzip
-        display_name: Generated Task Config - Execution ${execution}
-        optional: true
-
-    - command: timeout.update
-      params:
-        exec_timeout_secs: 10800  # 3 hours
-        timeout_secs: 10800  # 3 hours
-
-    - *f_expansions_write
-
-    - command: generate.tasks
-      params:
-        # Optional b/c reruns of this task will produce no JSON files to avoid
-        # generate.tasks failing
-        optional: true
-        files:
-          - src/generated_resmoke_config/*.json
+          - "./src/evergreen/gen_tasks_activate.sh"
 
   "generate fuzzer tasks":
-    - command: manifest.load
-    - *git_get_project
+    - *fetch_artifacts
     - *f_expansions_write
     - *kill_processes
     - *cleanup_environment
     - *set_up_venv
     - *upload_pip_requirements
-
-    - *configure_evergreen_api_credentials
     - *f_expansions_write
+    - *configure_evergreen_api_credentials
+
     - command: subprocess.exec
+      type: test
       params:
         binary: bash
         args:
-          - "./src/evergreen/fuzzer_tasks_generate.sh"
-
-    - command: archive.targz_pack
-      params:
-        target: generate_tasks_config.tgz
-        source_dir: src/generated_resmoke_config
-        include:
-          - "*"
-
-    - command: s3.put
-      params:
-        aws_key: ${aws_key}
-        aws_secret: ${aws_secret}
-        local_file: generate_tasks_config.tgz
-        remote_file: ${project}/${build_variant}/${revision}/generate_tasks/${name}_gen-${build_id}.tgz
-        bucket: mciuploads
-        permissions: public-read
-        content_type: application/gzip
-        display_name: Generated Task Config - Execution ${execution}
-        optional: true
-
-    - command: timeout.update
-      params:
-        exec_timeout_secs: 10800  # 3 hours
-        timeout_secs: 10800  # 3 hours
-    - *f_expansions_write
-
-    - command: generate.tasks
-      params:
-        optional: true
-        files:
-          - src/generated_resmoke_config/${name}.json
+          - "./src/evergreen/gen_tasks_activate.sh"
 
   "setup jstestfuzz":
     - *f_expansions_write
@@ -2122,6 +2003,7 @@ tasks:
         include:
           - "./build/**.gcno"
           - "./etc/*san.suppressions"
+          - "./etc/backports_required_for_multiversion_tests.yml"
           - "./etc/expansions.default.yml"
           - "./etc/pip/**"
           - "./etc/repo_config.yaml"
@@ -3744,7 +3626,8 @@ tasks:
       name: resharding_fuzzer_idempotency
 
 ## Tests that the multiversion test generation logic is not broken.
-- name: multiversion_sanity_check_gen
+- <<: *gen_task_template
+  name: multiversion_sanity_check_gen
   commands:
   - func: "generate implicit multiversion tasks"
     vars:
@@ -3752,7 +3635,8 @@ tasks:
       resmoke_args: --storageEngine=wiredTiger --includeWithAnyTags=multiversion_sanity_check
       require_multiversion: true
 
-- name: replica_sets_jscore_multiversion_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_jscore_multiversion_passthrough_gen
   tags: ["multiversion_passthrough"]
   commands:
   - func: "generate implicit multiversion tasks"
@@ -3887,10 +3771,9 @@ tasks:
       resmoke_args: --suites=aggregation_read_concern_majority_passthrough --storageEngine=wiredTiger
       resmoke_jobs_factor: 0.5
 
-- name: aggregation_secondary_reads_gen
+- <<: *gen_task_template
+  name: aggregation_secondary_reads_gen
   tags: ["aggregation", "secondary_reads"]
-  depends_on:
-  - name: aggregation
   commands:
   - func: "generate resmoke tasks"
     vars:
@@ -3928,7 +3811,8 @@ tasks:
     vars:
       resmoke_args: --suites=audit --storageEngine=wiredTiger
 
-- name: auth_gen
+- <<: *gen_task_template
+  name: auth_gen
   tags: ["auth"]
   commands:
   - func: "generate resmoke tasks"
@@ -3955,6 +3839,17 @@ tasks:
       repeat_tests_min: 2
       repeat_tests_max: 1000
 
+- name: build_variant_gen
+  commands:
+    - command: manifest.load
+    - *git_get_project
+    - *f_expansions_write
+    - *kill_processes
+    - *cleanup_environment
+    - func: "set up venv"
+    - func: "upload pip requirements"
+    - func: "generate build variant"
+
 - name: selected_tests_gen
   commands:
   - command: manifest.load
@@ -3966,7 +3861,8 @@ tasks:
   - func: "upload pip requirements"
   - func: "generate selected tests"
 
-- name: auth_audit_gen
+- <<: *gen_task_template
+  name: auth_audit_gen
   tags: ["auth", "audit"]
   commands:
   - func: "generate resmoke tasks"
@@ -3982,7 +3878,7 @@ tasks:
     vars:
       resmoke_args: --suites=change_streams --storageEngine=wiredTiger
 
-- <<: *task_template
+- <<: *gen_task_template
   name: change_streams_multiversion_gen
   tags: ["multiversion_passthrough"]
   commands:
@@ -4045,11 +3941,9 @@ tasks:
     vars:
       resmoke_args: --suites=change_streams_sharded_collections_passthrough --storageEngine=wiredTiger
 
-- <<: *task_template
+- <<: *gen_task_template
   name: change_streams_sharded_collections_multiversion_passthrough_gen
   tags: ["multiversion_passthrough"]
-  depends_on:
-  - name: change_streams_multiversion_gen
   commands:
   - func: "generate implicit multiversion tasks"
     vars:
@@ -4593,7 +4487,8 @@ tasks:
     vars:
       resmoke_args: --suites=causally_consistent_jscore_txns_passthrough --storageEngine=wiredTiger
 
-- name: sharded_causally_consistent_jscore_txns_passthrough_gen
+- <<: *gen_task_template
+  name: sharded_causally_consistent_jscore_txns_passthrough_gen
   tags: ["sharding", "jscore", "causally_consistent", "txns"]
   commands:
   - func: "generate resmoke tasks"
@@ -4601,7 +4496,8 @@ tasks:
       dependsOn: jsCore
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharded_causally_consistent_jscore_txns_passthrough_without_snapshot_gen
+- <<: *gen_task_template
+  name: sharded_causally_consistent_jscore_txns_passthrough_without_snapshot_gen
   tags: ["sharding", "wo_snapshot", "causally_consistent", "jscore"]
   commands:
   - func: "generate resmoke tasks"
@@ -4610,7 +4506,8 @@ tasks:
       suite: sharded_causally_consistent_jscore_txns_passthrough
       resmoke_args: --storageEngine=wiredTiger --excludeWithAnyTags=uses_snapshot_read_concern
 
-- name: causally_consistent_hedged_reads_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: causally_consistent_hedged_reads_jscore_passthrough_gen
   tags: ["causally_consistent", "sharding", "jscore"]
   commands:
   - func: "generate resmoke tasks"
@@ -4636,14 +4533,16 @@ tasks:
     vars:
       resmoke_args: --suites=replica_sets_jscore_passthrough --storageEngine=wiredTiger
 
-- name: replica_sets_reconfig_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_reconfig_jscore_passthrough_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_reconfig_jscore_stepdown_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_reconfig_jscore_stepdown_passthrough_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
@@ -4657,14 +4556,16 @@ tasks:
     vars:
       resmoke_args: --suites=replica_sets_reconfig_kill_primary_jscore_passthrough --storageEngine=wiredTiger
 
-- name: replica_sets_api_version_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_api_version_jscore_passthrough_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
       fallback_num_sub_suites: 5
 
-- name: replica_sets_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_jscore_passthrough_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
@@ -4689,7 +4590,8 @@ tasks:
     vars:
       resmoke_args: --suites=replica_sets_multi_stmt_txn_jscore_passthrough --storageEngine=wiredTiger
 
-- name: replica_sets_multi_stmt_txn_stepdown_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_multi_stmt_txn_stepdown_jscore_passthrough_gen
   tags: ["replica_sets", "non_maj_read"]
   commands:
   - func: "generate resmoke tasks"
@@ -4715,14 +4617,16 @@ tasks:
     vars:
       resmoke_args: --suites=replica_sets_multi_stmt_txn_terminate_primary_jscore_passthrough --storageEngine=wiredTiger
 
-- name: replica_sets_update_v1_oplog_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_update_v1_oplog_jscore_passthrough_gen
   tags: ["replica_sets", "non_maj_read"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_initsync_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: replica_sets_initsync_jscore_passthrough_gen
   tags: ["replica_sets", "san", "large"]
   commands:
   - func: "generate resmoke tasks"
@@ -4774,7 +4678,8 @@ tasks:
     vars:
       resmoke_args: --suites=mongos_test
 
-- name: multiversion_auth_gen
+- <<: *gen_task_template
+  name: multiversion_auth_gen
   tags: ["auth", "multiversion"]
   commands:
   - func: "generate resmoke tasks"
@@ -4782,7 +4687,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       require_multiversion: true
 
-- name: multiversion_gen
+- <<: *gen_task_template
+  name: multiversion_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
@@ -4792,21 +4698,24 @@ tasks:
 # Tests the runFeatureFlagMultiversionTest helper.
 # This requires the 'featureFlagToaster' and 'featureFlagSpoon' parameters to be set to true on
 # build variants that enable this task.
-- name: feature_flag_multiversion_gen
+- <<: *gen_task_template
+  name: feature_flag_multiversion_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: "--storageEngine=wiredTiger"
       require_multiversion: true
 
-- name: unittest_shell_hang_analyzer_gen
+- <<: *gen_task_template
+  name: unittest_shell_hang_analyzer_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
       suite: unittest_shell_hang_analyzer
       resmoke_args: --storageEngine=wiredTiger
 
-- name: noPassthrough_gen
+- <<: *gen_task_template
+  name: noPassthrough_gen
   tags: ["misc_js"]
   commands:
   - func: "generate resmoke tasks"
@@ -4816,7 +4725,8 @@ tasks:
       use_large_distro: "true"
 
 # Only run hot_backups tests for hot_backups variant.
-- name: noPassthroughHotBackups_gen
+- <<: *gen_task_template
+  name: noPassthroughHotBackups_gen
   commands:
     - func: "generate resmoke tasks"
       vars:
@@ -4824,7 +4734,8 @@ tasks:
         resmoke_args: --storageEngine=wiredTiger src/mongo/db/modules/*/jstests/hot_backups/*.js
         use_large_distro: "true"
 
-- name: noPassthroughWithMongod_gen
+- <<: *gen_task_template
+  name: noPassthroughWithMongod_gen
   tags: ["misc_js"]
   commands:
   - func: "generate resmoke tasks"
@@ -4842,7 +4753,8 @@ tasks:
     vars:
       resmoke_args: --suites=bulk_gle_passthrough --storageEngine=wiredTiger
 
-- name: slow1_gen
+- <<: *gen_task_template
+  name: slow1_gen
   tags: ["misc_js", "non_win_dbg"]
   commands:
   - func: "generate resmoke tasks"
@@ -4869,7 +4781,7 @@ tasks:
     vars:
       resmoke_args: --suites=sharded_collections_jscore_passthrough --storageEngine=wiredTiger
 
-- <<: *task_template
+- <<: *gen_task_template
   name: sharded_collections_jscore_multiversion_passthrough_gen
   tags: ["multiversion_passthrough"]
   commands:
@@ -4888,7 +4800,7 @@ tasks:
     vars:
       resmoke_args: --suites=sharding_jscore_passthrough --storageEngine=wiredTiger
 
-- <<: *task_template
+- <<: *gen_task_template
   name: sharding_jscore_multiversion_passthrough_gen
   tags: ["multiversion_passthrough"]
   commands:
@@ -4898,7 +4810,8 @@ tasks:
       resmoke_args: --storageEngine=wiredTiger
       require_multiversion: true
 
-- name: sharding_api_version_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: sharding_api_version_jscore_passthrough_gen
   tags: ["sharding", "jscore"]
   commands:
   - func: "generate resmoke tasks"
@@ -4942,7 +4855,8 @@ tasks:
     vars:
       resmoke_args: --suites=sharded_multi_stmt_txn_jscore_passthrough --storageEngine=wiredTiger
 
-- name: multi_shard_multi_stmt_txn_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: multi_shard_multi_stmt_txn_jscore_passthrough_gen
   tags: ["multi_shard", "multi_stmt", "common"]
   commands:
   - func: "generate resmoke tasks"
@@ -4951,14 +4865,16 @@ tasks:
       resmoke_args: --storageEngine=wiredTiger
       resmoke_jobs_max: 0  # No cap on number of jobs.
 
-- name: multi_shard_local_read_write_multi_stmt_txn_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: multi_shard_local_read_write_multi_stmt_txn_jscore_passthrough_gen
   tags: ["multi_shard", "common"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: multi_stmt_txn_jscore_passthrough_with_migration_gen
+- <<: *gen_task_template
+  name: multi_stmt_txn_jscore_passthrough_with_migration_gen
   tags: ["multi_stmt"]
   commands:
   - func: "generate resmoke tasks"
@@ -4966,7 +4882,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: multi_shard_multi_stmt_txn_kill_primary_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: multi_shard_multi_stmt_txn_kill_primary_jscore_passthrough_gen
   tags: ["multi_shard"]
   commands:
   - func: "generate resmoke tasks"
@@ -4974,7 +4891,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: multi_shard_multi_stmt_txn_stepdown_primary_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: multi_shard_multi_stmt_txn_stepdown_primary_jscore_passthrough_gen
   tags: ["multi_shard"]
   commands:
   - func: "generate resmoke tasks"
@@ -4982,7 +4900,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: tenant_migration_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: tenant_migration_jscore_passthrough_gen
   tags: ["tenant_migration"]
   commands:
   - func: "generate resmoke tasks"
@@ -4990,7 +4909,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: tenant_migration_causally_consistent_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: tenant_migration_causally_consistent_jscore_passthrough_gen
   tags: ["tenant_migration"]
   commands:
   - func: "generate resmoke tasks"
@@ -4998,7 +4918,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: tenant_migration_multi_stmt_txn_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: tenant_migration_multi_stmt_txn_jscore_passthrough_gen
   tags: ["tenant_migration", "txn"]
   commands:
   - func: "generate resmoke tasks"
@@ -5006,7 +4927,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: tenant_migration_stepdown_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: tenant_migration_stepdown_jscore_passthrough_gen
   tags: ["tenant_migration"]
   commands:
   - func: "generate resmoke tasks"
@@ -5014,7 +4936,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: tenant_migration_terminate_primary_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: tenant_migration_terminate_primary_jscore_passthrough_gen
   tags: ["tenant_migration"]
   commands:
   - func: "generate resmoke tasks"
@@ -5024,7 +4947,8 @@ tasks:
       resmoke_args: --storageEngine=wiredTiger
       fallback_num_sub_suites: 10
 
-- name: tenant_migration_kill_primary_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: tenant_migration_kill_primary_jscore_passthrough_gen
   tags: ["tenant_migration"]
   commands:
   - func: "generate resmoke tasks"
@@ -5034,9 +4958,9 @@ tasks:
       resmoke_args: --storageEngine=wiredTiger
       fallback_num_sub_suites: 10
 
-- <<: *task_template
+- <<: *gen_task_template
   name: parallel_gen
-  tags: ["misc_js", "parallel"]
+  tags: ["misc_js"]
   commands:
   - func: "generate resmoke tasks"
     vars:
@@ -5083,7 +5007,8 @@ tasks:
       resmoke_args: --suites=concurrency_replication_metrics --storageEngine=wiredTiger
       resmoke_jobs_max: 1
 
-- name: concurrency_replication_gen
+- <<: *gen_task_template
+  name: concurrency_replication_gen
   tags: ["concurrency", "common", "repl"]
   commands:
   - func: "generate resmoke tasks"
@@ -5091,7 +5016,7 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- <<: *task_template
+- <<: *gen_task_template
   name: concurrency_replication_multiversion_gen
   tags: [multiversion_passthrough]
   commands:
@@ -5101,7 +5026,8 @@ tasks:
       resmoke_args: --storageEngine=wiredTiger
       require_multiversion: true
 
-- name: concurrency_replication_causal_consistency_gen
+- <<: *gen_task_template
+  name: concurrency_replication_causal_consistency_gen
   tags: ["concurrency", "repl", "large", "non_live_record"]
   commands:
   - func: "generate resmoke tasks"
@@ -5150,7 +5076,8 @@ tasks:
       resmoke_args: --suites=concurrency_replication_multi_stmt_txn_ubsan --storageEngine=wiredTiger
       resmoke_jobs_max: 1
 
-- name: concurrency_replication_wiredtiger_cursor_sweeps_gen
+- <<: *gen_task_template
+  name: concurrency_replication_wiredtiger_cursor_sweeps_gen
   tags: ["concurrency", "repl"]
   commands:
   - func: "generate resmoke tasks"
@@ -5158,7 +5085,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_replication_wiredtiger_eviction_debug_gen
+- <<: *gen_task_template
+  name: concurrency_replication_wiredtiger_eviction_debug_gen
   tags: ["concurrency", "repl", "debug_only"]
   commands:
   - func: "generate resmoke tasks"
@@ -5166,7 +5094,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_replication_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_replication_gen
   tags: ["concurrency", "common", "read_concern_maj", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5175,7 +5104,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_replication_multiversion_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_replication_multiversion_gen
   tags: ["multiversion_passthrough", "sharded"]
   commands:
   - func: "generate implicit multiversion tasks"
@@ -5184,7 +5114,8 @@ tasks:
       resmoke_args: --storageEngine=wiredTiger
       require_multiversion: true
 
-- name: concurrency_sharded_replication_with_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_replication_with_balancer_gen
   tags: ["concurrency", "common", "read_concern_maj", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5193,7 +5124,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_replication_no_txns_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_replication_no_txns_gen
   tags: ["concurrency", "no_txns", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5203,7 +5135,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_replication_no_txns_with_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_replication_no_txns_with_balancer_gen
   tags: ["concurrency", "no_txns", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5213,7 +5146,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_clusterwide_ops_add_remove_shards_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_clusterwide_ops_add_remove_shards_gen
   tags: ["concurrency", "common", "read_concern_maj", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5222,7 +5156,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_causal_consistency_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_causal_consistency_gen
   tags: ["concurrency", "non_live_record", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5231,7 +5166,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_causal_consistency_and_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_causal_consistency_and_balancer_gen
   tags: ["concurrency", "large", "non_live_record", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5240,7 +5176,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_with_stepdowns_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_with_stepdowns_gen
   tags: ["concurrency", "stepdowns", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5249,7 +5186,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_with_stepdowns_and_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_with_stepdowns_and_balancer_gen
   tags: ["concurrency", "stepdowns", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5258,7 +5196,8 @@ tasks:
       use_large_distro: "true"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_terminate_primary_with_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_terminate_primary_with_balancer_gen
   tags: ["concurrency", "stepdowns", "kill_terminate", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5267,7 +5206,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_kill_primary_with_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_kill_primary_with_balancer_gen
   tags: ["concurrency", "stepdowns", "kill_terminate", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5276,7 +5216,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_multi_stmt_txn_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_multi_stmt_txn_gen
   tags: ["concurrency", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5285,7 +5226,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_multi_stmt_txn_with_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_multi_stmt_txn_with_balancer_gen
   tags: ["concurrency", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5294,7 +5236,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_local_read_write_multi_stmt_txn_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_local_read_write_multi_stmt_txn_gen
   tags: ["concurrency", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5303,7 +5246,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_local_read_write_multi_stmt_txn_with_balancer_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_local_read_write_multi_stmt_txn_with_balancer_gen
   tags: ["concurrency", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5312,7 +5256,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_sharded_multi_stmt_txn_with_stepdowns_gen
+- <<: *gen_task_template
+  name: concurrency_sharded_multi_stmt_txn_with_stepdowns_gen
   tags: ["concurrency", "stepdowns", "large", "sharded"]
   commands:
   - func: "generate resmoke tasks"
@@ -5321,7 +5266,7 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- <<: *task_template
+- <<: *gen_task_template
   name: concurrency_sharded_multi_stmt_txn_terminate_primary_gen
   tags: ["concurrency", "stepdowns", "kill_terminate", "sharded"]
   commands:
@@ -5331,7 +5276,7 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- <<: *task_template
+- <<: *gen_task_template
   name: concurrency_sharded_multi_stmt_txn_kill_primary_gen
   tags: ["concurrency", "stepdowns", "kill_terminate", "sharded"]
   commands:
@@ -5341,7 +5286,8 @@ tasks:
       resmoke_args: "--storageEngine=wiredTiger"
       resmoke_jobs_max: 1
 
-- name: concurrency_simultaneous_gen
+- <<: *gen_task_template
+  name: concurrency_simultaneous_gen
   tags: ["concurrency", "common"]
   commands:
   - func: "generate resmoke tasks"
@@ -5388,7 +5334,8 @@ tasks:
     vars:
       resmoke_args: --suites=read_concern_linearizable_passthrough --storageEngine=wiredTiger
 
-- name: read_concern_majority_passthrough_gen
+- <<: *gen_task_template
+  name: read_concern_majority_passthrough_gen
   tags: ["read_write_concern"]
   commands:
   - func: "generate resmoke tasks"
@@ -5414,7 +5361,8 @@ tasks:
     vars:
       resmoke_args: --suites=cwrwc_passthrough --storageEngine=wiredTiger
 
-- name: cwrwc_rc_majority_passthrough_gen
+- <<: *gen_task_template
+  name: cwrwc_rc_majority_passthrough_gen
   tags: ["read_write_concern"]
   commands:
   - func: "generate resmoke tasks"
@@ -5431,21 +5379,24 @@ tasks:
     vars:
       resmoke_args: --suites=cwrwc_wc_majority_passthrough --storageEngine=wiredTiger
 
-- name: secondary_reads_passthrough_gen
+- <<: *gen_task_template
+  name: secondary_reads_passthrough_gen
   commands:
   - func: "generate resmoke tasks"
     vars:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_gen
+- <<: *gen_task_template
+  name: replica_sets_gen
   tags: ["replica_sets", "san", "large"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_ese_gen
+- <<: *gen_task_template
+  name: replica_sets_ese_gen
   tags: ["replica_sets", "encrypt", "san"]
   commands:
   - func: "generate resmoke tasks"
@@ -5453,7 +5404,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_ese_gcm_gen
+- <<: *gen_task_template
+  name: replica_sets_ese_gcm_gen
   tags: ["replica_sets", "encrypt", "san", "gcm"]
   commands:
   - func: "generate resmoke tasks"
@@ -5461,7 +5413,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_auth_gen
+- <<: *gen_task_template
+  name: replica_sets_auth_gen
   tags: ["replica_sets", "common", "san", "auth"]
   commands:
   - func: "generate resmoke tasks"
@@ -5469,28 +5422,31 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_large_txns_format_gen
+- <<: *gen_task_template
+  name: replica_sets_large_txns_format_gen
   tags: ["replica_sets", "multi_oplog", "san"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_max_mirroring_gen
+- <<: *gen_task_template
+  name: replica_sets_max_mirroring_gen
   tags: ["replica_sets", "san"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: replica_sets_update_v1_oplog_gen
+- <<: *gen_task_template
+  name: replica_sets_update_v1_oplog_gen
   tags: ["replica_sets", "san"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- <<: *task_template
+- <<: *gen_task_template
   name: replica_sets_multiversion_gen
   tags: ["random_multiversion_ds"]
   commands:
@@ -5508,7 +5464,8 @@ tasks:
     vars:
       resmoke_args: --suites=sasl --storageEngine=wiredTiger
 
-- name: sharding_gen
+- <<: *gen_task_template
+  name: sharding_gen
   tags: ["sharding", "common"]
   commands:
   - func: "generate resmoke tasks"
@@ -5516,7 +5473,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharding_multiversion_gen
+- <<: *gen_task_template
+  name: sharding_multiversion_gen
   tags: ["random_multiversion_ds"]
   commands:
   - func: "generate randomized multiversion tasks"
@@ -5526,7 +5484,8 @@ tasks:
       require_multiversion: true
       suite: sharding_multiversion
 
-- name: sharding_max_mirroring_gen
+- <<: *gen_task_template
+  name: sharding_max_mirroring_gen
   tags: ["sharding", "common"]
   commands:
   - func: "generate resmoke tasks"
@@ -5534,7 +5493,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharding_csrs_continuous_config_stepdown_gen
+- <<: *gen_task_template
+  name: sharding_csrs_continuous_config_stepdown_gen
   tags: ["sharding", "common", "csrs", "non_live_record"]
   commands:
   - func: "generate resmoke tasks"
@@ -5543,7 +5503,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharding_ese_gen
+- <<: *gen_task_template
+  name: sharding_ese_gen
   tags: ["sharding", "encrypt"]
   commands:
   - func: "generate resmoke tasks"
@@ -5551,7 +5512,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharding_ese_gcm_gen
+- <<: *gen_task_template
+  name: sharding_ese_gcm_gen
   tags: ["sharding", "encrypt", "gcm"]
   commands:
   - func: "generate resmoke tasks"
@@ -5559,7 +5521,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharding_op_query_gen
+- <<: *gen_task_template
+  name: sharding_op_query_gen
   tags: ["sharding", "common", "op_query"]
   commands:
   - func: "generate resmoke tasks"
@@ -5568,7 +5531,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --shellReadMode=legacy --storageEngine=wiredTiger --excludeWithAnyTags=requires_find_command
 
-- name: sharding_auth_gen
+- <<: *gen_task_template
+  name: sharding_auth_gen
   tags: ["sharding", "auth"]
   commands:
   - func: "generate resmoke tasks"
@@ -5576,7 +5540,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharding_auth_audit_gen
+- <<: *gen_task_template
+  name: sharding_auth_audit_gen
   tags: ["auth", "audit", "non_live_record"]
   commands:
   - func: "generate resmoke tasks"
@@ -5584,7 +5549,8 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharding_last_lts_mongos_and_mixed_shards_gen
+- <<: *gen_task_template
+  name: sharding_last_lts_mongos_and_mixed_shards_gen
   tags: ["sharding", "common", "multiversion"]
   commands:
   - func: "generate explicit multiversion tasks"
@@ -5593,7 +5559,8 @@ tasks:
       require_multiversion: true
       resmoke_args: --tagFile=generated_resmoke_config/multiversion_exclude_tags.yml
 
-- name: sharding_update_v1_oplog_gen
+- <<: *gen_task_template
+  name: sharding_update_v1_oplog_gen
   tags: ["sharding", "common"]
   commands:
   - func: "generate resmoke tasks"
@@ -5612,14 +5579,16 @@ tasks:
       snmp_config_path: SNMPCONFPATH=snmpconf
       resmoke_args: --suites=snmp --storageEngine=wiredTiger
 
-- name: ssl_gen
+- <<: *gen_task_template
+  name: ssl_gen
   tags: ["encrypt", "ssl"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: "--storageEngine=wiredTiger --mongodSetParameters='{logComponentVerbosity: {network: 2, replication: {heartbeats: 2}}}'"
 
-- name: sslSpecial_gen
+- <<: *gen_task_template
+  name: sslSpecial_gen
   tags: ["encrypt", "ssl"]
   commands:
   - func: "generate resmoke tasks"
@@ -5627,7 +5596,8 @@ tasks:
       suite: ssl_special
       resmoke_args: --storageEngine=wiredTiger
 
-- name: ssl_x509_gen
+- <<: *gen_task_template
+  name: ssl_x509_gen
   tags: ["encrypt", "ssl"]
   commands:
   - func: "generate resmoke tasks"
@@ -5670,42 +5640,48 @@ tasks:
     vars:
       resmoke_args: --suites=session_jscore_passthrough --storageEngine=wiredTiger
 
-- name: causally_consistent_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: causally_consistent_jscore_passthrough_gen
   tags: ["causally_consistent"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: causally_consistent_jscore_passthrough_auth_gen
+- <<: *gen_task_template
+  name: causally_consistent_jscore_passthrough_auth_gen
   tags: ["causally_consistent"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: causally_consistent_read_concern_snapshot_passthrough_gen
+- <<: *gen_task_template
+  name: causally_consistent_read_concern_snapshot_passthrough_gen
   tags: ["causally_consistent", "read_write_concern", "durable_history"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharded_causally_consistent_read_concern_snapshot_passthrough_gen
+- <<: *gen_task_template
+  name: sharded_causally_consistent_read_concern_snapshot_passthrough_gen
   tags: ["causally_consistent", "read_write_concern", "durable_history"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: sharded_causally_consistent_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: sharded_causally_consistent_jscore_passthrough_gen
   tags: ["causally_consistent"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: retryable_writes_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: retryable_writes_jscore_passthrough_gen
   tags: ["retry"]
   commands:
   - func: "generate resmoke tasks"
@@ -5713,91 +5689,104 @@ tasks:
       use_large_distro: "true"
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_replication_default_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_replication_default_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache", "repl"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_replication_100ms_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_replication_100ms_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache", "repl"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_replication_1sec_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_replication_1sec_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache", "one_sec", "repl"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_replication_10sec_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_replication_10sec_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache", "repl"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_sharding_default_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_sharding_default_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_sharding_100ms_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_sharding_100ms_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_sharding_100ms_refresh_jscore_txns_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_sharding_100ms_refresh_jscore_txns_passthrough_gen
   tags: ["logical_session_cache"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_sharding_1sec_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_sharding_1sec_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache", "one_sec"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_sharding_10sec_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_sharding_10sec_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_standalone_default_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_standalone_default_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_standalone_100ms_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_standalone_100ms_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_standalone_1sec_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_standalone_1sec_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache", "one_sec"]
   commands:
   - func: "generate resmoke tasks"
     vars:
       resmoke_args: --storageEngine=wiredTiger
 
-- name: logical_session_cache_standalone_10sec_refresh_jscore_passthrough_gen
+- <<: *gen_task_template
+  name: logical_session_cache_standalone_10sec_refresh_jscore_passthrough_gen
   tags: ["logical_session_cache"]
   commands:
   - func: "generate resmoke tasks"
@@ -7198,6 +7187,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel80-large
+  - name: build_variant_gen
   - name: .integration !.audit
     distros:
     - rhel80-medium
@@ -7236,6 +7226,7 @@ buildvariants:
   - name: compile_test_and_package_parallel_dbtest_stream_TG
     distros:
     - rhel80-xlarge
+  - name: build_variant_gen
   - name: .aggregation !.encrypt
   - name: .auth !.audit !.gle !.multiversion
   - name: bulk_gle_passthrough
@@ -7290,6 +7281,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel80-xlarge
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: aggregation_auth
@@ -7327,6 +7319,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: .auth !.audit !.multiversion
@@ -7399,6 +7392,7 @@ buildvariants:
   - name: compile_ninja_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: audit
   - name: causally_consistent_jscore_txns_passthrough
@@ -7468,6 +7462,7 @@ buildvariants:
     scons_cache_scope: shared
   tasks:
   - name: compile_test_and_package_serial_TG
+  - name: build_variant_gen
   - name: aggregation
   - name: aggregation_wildcard_fuzzer_gen
   - name: .auth !.audit !.multiversion !.jscore
@@ -7517,6 +7512,7 @@ buildvariants:
     scons_cache_scope: shared
   tasks:
   - name: compile_test_and_package_serial_TG
+  - name: build_variant_gen
   - name: free_monitoring
   - name: jsCore
   - name: replica_sets_jscore_passthrough
@@ -7550,6 +7546,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu2004-large
+  - name: build_variant_gen
   - name: .aggfuzzer .common !.multiversion
   - name: aggregation
   - name: .auth !.audit !.multiversion
@@ -7604,6 +7601,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu2004-large
+  - name: build_variant_gen
   - name: .aggfuzzer .common !.multiversion
   - name: audit
   - name: causally_consistent_jscore_txns_passthrough
@@ -7654,6 +7652,7 @@ buildvariants:
     scons_cache_scope: shared
   tasks:
   - name: compile_test_and_package_serial_TG
+  - name: build_variant_gen
   - name: aggregation
   - name: aggregation_wildcard_fuzzer_gen
   - name: .auth !.audit !.multiversion !.jscore
@@ -7702,6 +7701,7 @@ buildvariants:
     scons_cache_scope: shared
   tasks:
   - name: compile_test_and_package_serial_TG
+  - name: build_variant_gen
   - name: free_monitoring
   - name: jsCore
   - name: replica_sets_jscore_passthrough
@@ -7739,6 +7739,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - amazon1-2018-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: .auth !.gle !.multiversion
@@ -7793,6 +7794,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - amazon1-2018-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: .auth !.audit !.multiversion
@@ -7848,6 +7850,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - amazon2-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: audit
@@ -7901,6 +7904,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - amazon2-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: .auth !.audit !.multiversion
@@ -7953,6 +7957,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - amazon2-arm64-large
+  - name: build_variant_gen
   - name: .aggfuzzer !.multiversion
   - name: audit
   - name: auth_audit_gen
@@ -8005,6 +8010,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - amazon2-arm64-large
+  - name: build_variant_gen
   - name: aggregation
   - name: .auth !.audit !.multiversion
   - name: causally_consistent_jscore_txns_passthrough
@@ -8084,6 +8090,7 @@ buildvariants:
   - name: compile_build_tools_next_TG
     distros:
     - windows-vsCurrent-xlarge
+  - name: build_variant_gen
   - name: .aggregation !.auth !.encrypt
   - name: aggregation_expression_multiversion_fuzzer_gen
   - name: aggregation_expression_optimization_fuzzer_gen
@@ -8163,6 +8170,7 @@ buildvariants:
   - name: compile_build_tools_next_TG
     distros:
     - windows-vsCurrent-xlarge
+  - name: build_variant_gen
   - name: burn_in_tests_gen
   - name: buildscripts_test
   - name: noPassthrough_gen
@@ -8205,6 +8213,7 @@ buildvariants:
     - name: compile_test_and_package_serial_TG
       distros:
         - windows-vsCurrent-xlarge
+    - name: build_variant_gen
     - name: audit
     - name: auth_audit_gen
     - name: buildscripts_test
@@ -8270,6 +8279,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - windows-vsCurrent-large
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: audit
   - name: auth_audit_gen
@@ -8320,6 +8330,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - windows-vsCurrent-large
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: .aggregation !.auth !.encrypt !.unwind
   - name: auth_gen
@@ -8384,6 +8395,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - windows-vsCurrent-large
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: .aggregation !.auth !.encrypt !.unwind
   - name: auth_gen
@@ -8469,6 +8481,7 @@ buildvariants:
   tasks:
   - name: compile_test_and_package_serial_TG
   - name: compile_build_tools_next_TG
+  - name: build_variant_gen
   - name: .aggregation !.auth !.encrypt !.unwind
   - name: .auth .gle
   - name: auth_gen
@@ -8519,6 +8532,7 @@ buildvariants:
   tasks:
   - name: compile_test_and_package_serial_TG
   - name: compile_build_tools_next_TG
+  - name: build_variant_gen
   - name: aggregation
   - name: auth_gen
   - name: causally_consistent_jscore_txns_passthrough
@@ -8554,6 +8568,7 @@ buildvariants:
   - name: compile_ninja_next_TG
   - name: compile_build_tools_next_TG
   - name: libdeps_graph_linting_TG
+  - name: build_variant_gen
   - name: audit
   - name: auth_audit_gen
   - name: causally_consistent_jscore_txns_passthrough
@@ -8583,6 +8598,7 @@ buildvariants:
     num_scons_link_jobs_available: 0.99
   tasks:
   - name: compile_test_and_package_serial_TG
+  - name: build_variant_gen
   - name: audit
   - name: auth_audit_gen
   - name: causally_consistent_jscore_txns_passthrough
@@ -8681,6 +8697,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel80-large
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: .aggregation
   - name: audit
@@ -8792,6 +8809,7 @@ buildvariants:
   - name: compile_test_and_package_parallel_dbtest_stream_TG
     distros:
     - rhel80-xlarge
+  - name: build_variant_gen
   - name: lint_pylinters
   - name: lint_clang_format
   - name: lint_eslint
@@ -8912,6 +8930,7 @@ buildvariants:
   - name: compile_and_archive_dist_test_then_package_TG
     distros:
     - rhel80-large
+  - name: build_variant_gen
   - name: auth_gen
   - name: auth_audit_gen
   - name: causally_consistent_jscore_txns_passthrough
@@ -8984,6 +9003,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel80-xlarge
+  - name: build_variant_gen
   - name: .multiversion_fuzzer
   - name: .multiversion_passthrough
   - name: .random_multiversion_ds
@@ -9013,6 +9033,7 @@ buildvariants:
   - name: compile_test_and_package_parallel_core_stream_TG
     distros:
       - rhel80-large
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: .aggregation
   - name: audit
@@ -9129,6 +9150,7 @@ buildvariants:
     use_scons_cache: false
   tasks:
     - name: compile_test_and_package_serial_TG
+    - name: build_variant_gen
     - name: .aggregation !.unwind
     - name: audit
     - name: .auth
@@ -9184,6 +9206,7 @@ buildvariants:
     - name: compile_test_and_package_serial_TG
       distros:
         - rhel80-medium
+    - name: build_variant_gen
     - name: .aggregation
     - name: .auth
     - name: unittest_shell_hang_analyzer_gen
@@ -9239,6 +9262,7 @@ buildvariants:
   - name: compile_build_tools_next_TG
     distros:
     - rhel70
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: audit
   - name: auth_audit_gen
@@ -9296,6 +9320,7 @@ buildvariants:
   - name: compile_and_archive_dist_test_then_package_TG
     distros:
     - rhel80-large
+  - name: build_variant_gen
   - name: jsCore
   - name: sharding_gen
   - name: replica_sets_gen
@@ -9328,6 +9353,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel80-xlarge
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: audit
   - name: auth_audit_gen
@@ -9382,6 +9408,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel82-arm64-large
+  - name: build_variant_gen
   - name: .aggfuzzer !.multiversion
   - name: audit
   - name: auth_audit_gen
@@ -9439,6 +9466,7 @@ buildvariants:
     has_packages: false
   tasks:
   - name: compile_test_and_package_serial_TG
+  - name: build_variant_gen
   - name: jsCore
   - name: noPassthroughHotBackups_gen
 
@@ -9458,6 +9486,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel70
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: audit
   - name: auth_audit_gen
@@ -9507,6 +9536,7 @@ buildvariants:
   - name: compile_build_tools_next_TG
     distros:
     - ubuntu1804-xlarge
+  - name: build_variant_gen
   - name: jsCore
   - name: .read_write_concern !.write !.aggregation
   - name: replica_sets_jscore_passthrough
@@ -9533,6 +9563,7 @@ buildvariants:
   - name: compile_and_archive_dist_test_then_package_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: jsCore
   - name: sharding_gen
   - name: replica_sets_gen
@@ -9560,6 +9591,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel70
+  - name: build_variant_gen
   - name: aggregation
   - name: .auth !.audit !.multiversion
   - name: causally_consistent_jscore_txns_passthrough
@@ -9610,6 +9642,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel80-build
+  - name: build_variant_gen
   - name: aggregation
   - name: .auth !.audit !.multiversion
   - name: causally_consistent_jscore_txns_passthrough
@@ -9658,6 +9691,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel82-arm64-large
+  - name: build_variant_gen
   - name: aggregation
   - name: .auth !.audit !.multiversion
   - name: causally_consistent_jscore_txns_passthrough
@@ -9695,6 +9729,7 @@ buildvariants:
   - name: compile_and_archive_dist_test_then_package_TG
     distros:
     - rhel70
+  - name: build_variant_gen
   - name: .ssl
   - name: jsCore
   - name: external_auth
@@ -9728,6 +9763,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel81-power8-large
+  - name: build_variant_gen
   - name: .aggregation .common
   - name: audit
   - name: .auth !.multiversion !.jscore
@@ -9809,6 +9845,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel72-zseries-build
+  - name: build_variant_gen
   - name: .aggregation .common
   - name: audit
   - name: .auth !.multiversion !.jscore
@@ -9851,6 +9888,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel72-zseries-build
+  - name: build_variant_gen
   - name: jsCore
   - name: replica_sets_jscore_passthrough
   - name: ssl_gen
@@ -9913,6 +9951,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - suse12-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: audit
   - name: causally_consistent_jscore_txns_passthrough
@@ -9956,6 +9995,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - suse12-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: .auth !.audit !.multiversion
@@ -10005,6 +10045,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - suse15-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common !.multiversion
   - name: audit
   - name: causally_consistent_jscore_txns_passthrough
@@ -10045,6 +10086,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - suse15-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common !.multiversion
   - name: aggregation
   - name: .auth !.audit !.multiversion
@@ -10098,6 +10140,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - debian92-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: audit
   - name: causally_consistent_jscore_txns_passthrough
@@ -10141,6 +10184,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - debian92-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: aggregation_auth
@@ -10194,6 +10238,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - debian10-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: audit
   - name: causally_consistent_jscore_txns_passthrough
@@ -10237,6 +10282,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - debian10-build
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: aggregation
   - name: aggregation_auth
@@ -10298,6 +10344,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel80-xlarge
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: .aggregation !.unwind !.encrypt
   - name: audit
@@ -10363,6 +10410,7 @@ buildvariants:
   tasks:
   - name: compile_test_and_package_serial_TG
     # TODO (SERVER-58125): Re-enable the timeseries fuzzer for EFT
+  - name: build_variant_gen
   - name: .aggfuzzer .common !.timeseries
   - name: aggregation
   - name: .auth !.multiversion !.audit !.sharding
@@ -10404,6 +10452,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - rhel72-zseries-build
+  - name: build_variant_gen
   - name: .aggregation .common
   - name: .auth !.multiversion
   - name: audit
@@ -10453,6 +10502,7 @@ buildvariants:
   tasks:
   - name: compile_test_and_package_serial_TG
   - name: compile_benchmarks
+  - name: build_variant_gen
   - name: .aggregation
   - name: .auth
   - name: audit
@@ -10519,6 +10569,7 @@ buildvariants:
     test_flags: --excludeWithAnyTags=requires_fast_memory,requires_ocsp_stapling
   tasks:
   - name: compile_test_and_package_serial_TG
+  - name: build_variant_gen
   - name: .aggfuzzer .common
   - name: free_monitoring
   - name: .jstestfuzz !.initsync
@@ -10546,6 +10597,7 @@ buildvariants:
   tasks:
   - name: compile_test_and_package_serial_TG
   - name: compile_benchmarks
+  - name: build_variant_gen
   - name: .aggregation
   - name: .auth
   - name: audit
@@ -10624,6 +10676,7 @@ buildvariants:
   - name: compile_test_and_package_parallel_dbtest_stream_TG
     distros:
       - ubuntu1804-xlarge
+  - name: build_variant_gen
   - name: jsCore
   - name: jsCore_txns
   - name: unittest_shell_hang_analyzer_gen
@@ -10728,6 +10781,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggregation !.no_async
   - name: .sharding .auth
   - name: .sharding .causally_consistent !.wo_snapshot
@@ -10761,6 +10815,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggregation !.no_async
   - name: .sharding .auth
   - name: .sharding .causally_consistent !.wo_snapshot
@@ -10790,6 +10845,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggregation !.no_async
   - name: .sharding .auth
   - name: .sharding .causally_consistent !.wo_snapshot
@@ -10820,6 +10876,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggregation !.no_async
   - name: .sharding .auth
   - name: .sharding .causally_consistent !.wo_snapshot
@@ -10850,6 +10907,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggregation !.no_async
   - name: .sharding .auth
   - name: .sharding .causally_consistent !.wo_snapshot
@@ -10880,6 +10938,7 @@ buildvariants:
   - name: compile_test_and_package_serial_TG
     distros:
     - ubuntu1804-build
+  - name: build_variant_gen
   - name: .aggregation !.no_async
   - name: .sharding .auth
   - name: .sharding .causally_consistent !.wo_snapshot
@@ -10958,6 +11017,7 @@ buildvariants:
     test_flags: --excludeWithAnyTags=requires_fast_memory,live_record_incompatible
   tasks:
   - name: compile_and_archive_dist_test_TG
+  - name: build_variant_gen
   - name: .aggfuzzer
   - name: .aggregation
 #  - name: audit
diff --git a/etc/pip/components/evergreen.req b/etc/pip/components/evergreen.req
index e4dda2bd320..d8d602a16f1 100644
--- a/etc/pip/components/evergreen.req
+++ b/etc/pip/components/evergreen.req
@@ -3,5 +3,5 @@ dataclasses; python_version < "3.7"
 inject ~= 4.3.1
 GitPython ~= 3.1.7
 psutil
-pydantic ~= 1.7.3
+pydantic ~= 1.8.2
 structlog ~= 19.2.0
diff --git a/etc/pip/components/resmoke.req b/etc/pip/components/resmoke.req
index 339fdd63e21..675e9da0b7d 100644
--- a/etc/pip/components/resmoke.req
+++ b/etc/pip/components/resmoke.req
@@ -1,10 +1,10 @@
 curatorbin == 1.2.1
 PyKMIP == 0.4.0 # It's now 0.8.0. We're far enough back to have API conflicts.
-evergreen.py == 2.1.0
+evergreen.py == 3.1.0
 jinja2
 MarkupSafe == 1.1.0  # See SERVER-57036, this is a transitive dependency of jinja2
 mock
-shrub.py == 1.1.0
+shrub.py == 1.1.4
 ocspresponder == 0.5.0
 flask == 1.1.1
 ocspbuilder == 0.10.2
diff --git a/evergreen/fuzzer_tasks_generate.sh b/evergreen/gen_tasks_activate.sh
index 51a64c38c36..d2c46feb57d 100644
--- a/evergreen/fuzzer_tasks_generate.sh
+++ b/evergreen/gen_tasks_activate.sh
@@ -4,7 +4,6 @@ DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 cd src
 
 set -o errexit
-set -o verbose
 
 activate_venv
-$python buildscripts/evergreen_gen_fuzzer_tests.py --expansion-file ../expansions.yml
+$python buildscripts/evergreen_activate_gen_tasks.py --expansion-file ../expansions.yml --verbose
diff --git a/evergreen/generate_build_variant.sh b/evergreen/generate_build_variant.sh
new file mode 100644
index 00000000000..3c11c8c1a8c
--- /dev/null
+++ b/evergreen/generate_build_variant.sh
@@ -0,0 +1,13 @@
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" > /dev/null 2>&1 && pwd)"
+. "$DIR/prelude.sh"
+
+cd src
+
+set -o errexit
+
+activate_venv
+PATH=$PATH:$HOME $python buildscripts/evergreen_gen_build_variant.py \
+  --expansion-file ../expansions.yml \
+  --evg-api-config ./.evergreen.yml \
+  --output-file ${build_variant}.json \
+  --verbose
diff --git a/evergreen/implicit_multiversions_tasks_generate.sh b/evergreen/implicit_multiversions_tasks_generate.sh
index b4df4d1105b..576d546baaf 100644
--- a/evergreen/implicit_multiversions_tasks_generate.sh
+++ b/evergreen/implicit_multiversions_tasks_generate.sh
@@ -7,5 +7,7 @@ set -o errexit
 
 activate_venv
 PATH="$PATH:/data/multiversion"
-$python buildscripts/evergreen_gen_multiversion_tests.py run --expansion-file ../expansions.yml
-$python buildscripts/evergreen_gen_multiversion_tests.py generate-exclude-tags
+
+if [ -n "${require_multiversion}" ]; then
+  $python buildscripts/evergreen_gen_multiversion_tests.py generate-exclude-tags
+fi
diff --git a/evergreen/resmoke_tasks_generate.sh b/evergreen/resmoke_tasks_generate.sh
deleted file mode 100644
index 7ca1245b4b7..00000000000
--- a/evergreen/resmoke_tasks_generate.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
-. "$DIR/prelude.sh"
-
-if [ -n "$GENERATE_BUILD_VARIANTS" ]; then
-  echo "Skipping generation since 'generate_build_variants' is set."
-  exit 0
-fi
-
-cd src
-
-set -o errexit
-
-activate_venv
-$python buildscripts/evergreen_generate_resmoke_tasks.py --expansion-file ../expansions.yml --verbose