enable special_status_message interop for grpc-dotnet server
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index f26111f..e69e501 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -213,7 +213,7 @@
             ['cancel_after_first_response', 'ping_pong']
 
     def unimplemented_test_cases_server(self):
-        return _SKIP_COMPRESSION + _SKIP_SPECIAL_STATUS_MESSAGE
+        return _SKIP_COMPRESSION
 
     def __str__(self):
         return 'aspnetcore'