diff --git a/readthedocs/rtd_tests/tests/test_config_integration.py b/readthedocs/rtd_tests/tests/test_config_integration.py
index 44a1f833108..65880d0f40b 100644
--- a/readthedocs/rtd_tests/tests/test_config_integration.py
+++ b/readthedocs/rtd_tests/tests/test_config_integration.py
@@ -107,7 +107,6 @@ def test_python_supported_versions_default_image_1_0(self, load_config):
         img_settings = DOCKER_IMAGE_SETTINGS.get(self.project.container_image, None)
         if img_settings:
             expected_env_config.update(img_settings)
-            expected_env_config['DOCKER_IMAGE_SETTINGS'] = img_settings
 
         load_config.assert_called_once_with(
                 path=mock.ANY,