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diff --git a/deps/rabbitmq_cli/test/ctl/clear_parameter_command_test.exs b/deps/rabbitmq_cli/test/ctl/clear_parameter_command_test.exs
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+++ b/deps/rabbitmq_cli/test/ctl/clear_parameter_command_test.exs
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+## This Source Code Form is subject to the terms of the Mozilla Public
+## License, v. 2.0. If a copy of the MPL was not distributed with this
+## file, You can obtain one at https://mozilla.org/MPL/2.0/.
+##
+## Copyright (c) 2007-2020 VMware, Inc. or its affiliates.  All rights reserved.
+
+
+defmodule ClearParameterCommandTest do
+  use ExUnit.Case, async: false
+  import TestHelper
+
+  @command RabbitMQ.CLI.Ctl.Commands.ClearParameterCommand
+  @vhost "test1"
+  @root   "/"
+  @component_name "federation-upstream"
+  @key "reconnect-delay"
+  @value "{\"uri\":\"amqp://127.0.0.1:5672\"}"
+
+  setup_all do
+    RabbitMQ.CLI.Core.Distribution.start()
+
+    add_vhost @vhost
+
+    enable_federation_plugin()
+
+    on_exit([], fn ->
+      delete_vhost @vhost
+    end)
+
+    :ok
+  end
+
+  setup context do
+    on_exit(context, fn ->
+      clear_parameter context[:vhost], context[:component_name], context[:key]
+    end)
+
+    {
+      :ok,
+      opts: %{
+        node: get_rabbit_hostname()
+      }
+    }
+  end
+
+  test "merge_defaults: adds default vhost if missing" do
+    assert @command.merge_defaults([], %{}) == {[], %{vhost: "/"}}
+  end
+
+  test "merge_defaults: defaults can be overridden" do
+    assert @command.merge_defaults([], %{}) == {[], %{vhost: "/"}}
+    assert @command.merge_defaults([], %{vhost: "non_default"}) == {[], %{vhost: "non_default"}}
+  end
+
+  test "validate: argument validation" do
+    assert @command.validate(["one", "two"], %{}) == :ok
+    assert @command.validate([], %{}) == {:validation_failure, :not_enough_args}
+    assert @command.validate(["insufficient"], %{}) == {:validation_failure, :not_enough_args}
+    assert @command.validate(["this", "is", "many"], %{}) == {:validation_failure, :too_many_args}
+  end
+
+  @tag component_name: @component_name, key: @key, vhost: @vhost
+  test "run: returns error, if parameter does not exist", context do
+    vhost_opts = Map.merge(context[:opts], %{vhost: context[:vhost]})
+
+    assert @command.run(
+      [context[:component_name], context[:key]],
+      vhost_opts
+    ) == {:error_string, 'Parameter does not exist'}
+  end
+
+  test "run: throws a badrpc when instructed to contact an unreachable RabbitMQ node" do
+    opts = %{node: :jake@thedog, vhost: "/", timeout: 200}
+    assert match?({:badrpc, _}, @command.run([@component_name, @key], opts))
+  end
+
+
+  @tag component_name: @component_name, key: @key, vhost: @vhost
+  test "run: returns ok and clears parameter, if it exists", context do
+    vhost_opts = Map.merge(context[:opts], %{vhost: context[:vhost]})
+
+    set_parameter(context[:vhost], context[:component_name], context[:key], @value)
+
+    assert @command.run(
+      [context[:component_name], context[:key]],
+      vhost_opts
+    ) == :ok
+
+    assert_parameter_empty(context)
+  end
+
+  @tag component_name: "bad-component-name", key: @key, value: @value, vhost: @root
+  test "run: an invalid component_name returns a 'parameter does not exist' error", context do
+    vhost_opts = Map.merge(context[:opts], %{vhost: context[:vhost]})
+    assert @command.run(
+      [context[:component_name], context[:key]],
+      vhost_opts
+    ) == {:error_string, 'Parameter does not exist'}
+
+    assert list_parameters(context[:vhost]) == []
+  end
+
+  @tag component_name: @component_name, key: @key, value: @value, vhost: "bad-vhost"
+  test "run: an invalid vhost returns a 'parameter does not exist' error", context do
+    vhost_opts = Map.merge(context[:opts], %{vhost: context[:vhost]})
+
+    assert @command.run(
+      [context[:component_name], context[:key]],
+      vhost_opts
+    ) == {:error_string, 'Parameter does not exist'}
+  end
+
+  @tag component_name: @component_name, key: @key, value: @value, vhost: @vhost
+  test "banner", context do
+    vhost_opts = Map.merge(context[:opts], %{vhost: context[:vhost]})
+    set_parameter(context[:vhost], context[:component_name], context[:key], @value)
+
+    s = @command.banner(
+      [context[:component_name], context[:key]],
+      vhost_opts
+    )
+
+    assert s =~ ~r/Clearing runtime parameter/
+    assert s =~ ~r/"#{context[:key]}"/
+    assert s =~ ~r/"#{context[:component_name]}"/
+    assert s =~ ~r/"#{context[:vhost]}"/
+  end
+
+  defp assert_parameter_empty(context) do
+    parameter = context[:vhost]
+                |> list_parameters
+                |> Enum.filter(fn(param) ->
+                    param[:component_name] == context[:component_name] and
+                    param[:key] == context[:key]
+                    end)
+    assert parameter === []
+  end
+end