2 files changed, 9 insertions, 1 deletions
diff --git a/tests/conftest.py b/tests/conftest.py
index 325bb45..fc3871f 100755
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -34,6 +34,14 @@ with open(bootstrap_file) as f:
     code = compile(f.read(), "bootstrap.py", "exec")
     to_bootstrap = "pytest"
     exec(code, globals(), locals())
+
+    try:
+        from sqlalchemy.testing import asyncio
+    except ImportError:
+        pass
+    else:
+        asyncio.ENABLE_ASYNCIO = False
+
     from sqlalchemy.testing.plugin.pytestplugin import *  # noqa
 
     wrap_pytest_sessionstart = pytest_sessionstart  # noqa
diff --git a/tox.ini b/tox.ini
index fd1ce31..01c695a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,7 +34,7 @@ usedevelop=
 # if -n is used, we're working in brand new DBs anyway
 setenv=
     BASECOMMAND=python -m pytest --rootdir {toxinidir}
-    WORKERS=-n4
+    WORKERS={env:TOX_WORKERS:-n4}
     sqla079: WORKERS=--dropfirst
     cov: COVERAGE={[testenv]cov_args}
     sqlite: SQLITE={env:TOX_SQLITE:--db sqlite}