diff --git a/xds/internal/test/xds_server_serving_mode_test.go b/xds/internal/test/xds_server_serving_mode_test.go
index 94ec1a05527f..fe6d6d145de5 100644
--- a/xds/internal/test/xds_server_serving_mode_test.go
+++ b/xds/internal/test/xds_server_serving_mode_test.go
@@ -186,7 +186,7 @@ func (s) TestServerSideXDS_ServingModeChanges(t *testing.T) {
 	}
 
 	// Make sure RPCs succeed on cc1 and fail on cc2.
-	waitForSuccessfulRPC(ctx, t, cc2)
+	waitForSuccessfulRPC(ctx, t, cc1)
 	waitForFailedRPC(ctx, t, cc2)
 
 	// Update the management server to remove the first listener resource as