diff --git a/tests/unit/cli_test.py b/tests/unit/cli_test.py
index 3fc0a9855..cf3c8e8f2 100644
--- a/tests/unit/cli_test.py
+++ b/tests/unit/cli_test.py
@@ -110,39 +110,6 @@ class CLITestCase(unittest.TestCase):
         _, _, call_kwargs = mock_run_operation.mock_calls[0]
         assert call_kwargs['logs'] is False
 
-    @pytest.mark.xfail(IS_WINDOWS_PLATFORM, reason="requires dockerpty")
-    @mock.patch('compose.cli.main.PseudoTerminal', autospec=True)
-    def test_run_with_environment_merged_with_options_list(self, mock_pseudo_terminal):
-        command = TopLevelCommand()
-        mock_client = mock.create_autospec(docker.Client)
-        mock_project = mock.Mock(client=mock_client)
-        mock_project.get_service.return_value = Service(
-            'service',
-            client=mock_client,
-            environment=['FOO=ONE', 'BAR=TWO'],
-            image='someimage')
-
-        command.run(mock_project, {
-            'SERVICE': 'service',
-            'COMMAND': None,
-            '-e': ['BAR=NEW', 'OTHER=bär'.encode('utf-8')],
-            '--user': None,
-            '--no-deps': None,
-            '-d': True,
-            '-T': None,
-            '--entrypoint': None,
-            '--service-ports': None,
-            '--publish': [],
-            '--rm': None,
-            '--name': None,
-        })
-
-        _, _, call_kwargs = mock_client.create_container.mock_calls[0]
-        assert (
-            sorted(call_kwargs['environment']) ==
-            sorted(['FOO=ONE', 'BAR=NEW', 'OTHER=bär'])
-        )
-
     def test_run_service_with_restart_always(self):
         command = TopLevelCommand()
         mock_client = mock.create_autospec(docker.Client)