add AsyncCalServer tests to sanity tests
diff --git a/src/csharp/tests.json b/src/csharp/tests.json
index f733352..f6af340 100644
--- a/src/csharp/tests.json
+++ b/src/csharp/tests.json
@@ -1,5 +1,6 @@
 {
   "Grpc.Core.Tests": [
+    "Grpc.Core.Internal.Tests.AsyncCallServerTest",
     "Grpc.Core.Internal.Tests.AsyncCallTest",
     "Grpc.Core.Internal.Tests.ChannelArgsSafeHandleTest",
     "Grpc.Core.Internal.Tests.CompletionQueueEventTest",