One more set of fix

Author: TApplencourt

clang/bindings/python/tests/cindex/test_environment_variable.py

@@ -49,7 +49,10 @@ def test_working_libclang_library_path(self):
             reset_import_and_get_frech_config().lib
 
     @unittest.mock.patch.dict("os.environ", {"LIBCLANG_LIBRARY_PATH": "not_a_real_dir"})
-    def _test_non_working_libclang_library_path(self):
+    def test_non_working_libclang_library_path(self):
+        # Remove LIBCLANG_LIBRARY_FILE to avoid it taking precedence if set by the user
+        os.environ.pop("LIBCLANG_LIBRARY_FILE", None)
+
         config = reset_import_and_get_frech_config()
         import clang.cindex