diff --git a/src/python/grpcio_tests/tests/reflection/_reflection_servicer_test.py b/src/python/grpcio_tests/tests/reflection/_reflection_servicer_test.py
index 69192a2b741282b9dd64e5d752443f01a59bfb12..56b85c2dd09cfb16861dd15e8af69b47015ab115 100644
--- a/src/python/grpcio_tests/tests/reflection/_reflection_servicer_test.py
+++ b/src/python/grpcio_tests/tests/reflection/_reflection_servicer_test.py
@@ -114,6 +114,9 @@ class ReflectionServicerTest(unittest.TestCase):
                 )),)
         self.assertSequenceEqual(expected_responses, responses)
 
+    @unittest.skip(
+        'TODO(mmx): enable when (pure) python protobuf issue is fixed'
+        '(see https://github.com/google/protobuf/issues/2882)')
     def testFileContainingExtension(self):
         requests = (reflection_pb2.ServerReflectionRequest(
             file_containing_extension=reflection_pb2.ExtensionRequest(