TFE_DeleteOp(fn1);

  const string& fdef2 = FunctionWithErrorOp("TestCommUnavailable");
  TFE_ContextAddFunctionDef(ctx, fdef2.data(), fdef2.size(), status);
  TFE_Op* fn2 = TFE_NewOp(ctx, "FunctionWithTestCommUnavailable", status);
  CHECK_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  TFE_Execute(fn2, retval, &num_retvals, status);
  EXPECT_EQ(TF_UNAVAILABLE, TF_GetCode(status)) << TF_Message(status);