1 files changed, 2 insertions, 0 deletions
diff --git a/python/google/protobuf/pyext/python.proto b/python/google/protobuf/pyext/python.proto
index d47d402c..cce645d7 100644
--- a/python/google/protobuf/pyext/python.proto
+++ b/python/google/protobuf/pyext/python.proto
@@ -33,6 +33,7 @@
 // These message definitions are used to exercises known corner cases
 // in the C++ implementation of the Python API.
 
+syntax = "proto2";
 
 package google.protobuf.python.internal;
 
@@ -63,4 +64,5 @@ message TestAllExtensions {
 
 extend TestAllExtensions {
   optional TestAllTypes.NestedMessage optional_nested_message_extension = 1;
+  repeated TestAllTypes.NestedMessage repeated_nested_message_extension = 2;
 }