correction of type of config to mkdocs

Author: silentfatez

readthedocs/rtd_tests/tests/test_doc_builder.py

@@ -159,12 +159,12 @@ def test_project_without_mkdocs_yaml(
         checkout_path.return_value = tmp_dir
         docs_dir.return_value = tmp_dir
         get_mkdocs_yaml_path.side_effect = MkDocsYAMLParseError
-        mock_config = mock.MagicMock()
-        mock_config.mkdocs.configuration = "mkdocs.yml"
-
-        python_env = mock.MagicMock()
-        python_env.config = mock_config
-
+        python_env = Virtualenv(
+            version=self.version,
+            build_env=self.build_env,
+            config=get_build_config(
+            {"mkdocs": {"configuration": "mkdocs.yml"}},
+        ))
         base_mkdocs = BaseMkdocs(
             build_env=self.build_env,
             python_env=python_env,