diff --git a/.ng-dev/google-sync-config.json b/.ng-dev/google-sync-config.json
index 7bd62f2ffcb8..effc32010c0f 100644
--- a/.ng-dev/google-sync-config.json
+++ b/.ng-dev/google-sync-config.json
@@ -24,6 +24,7 @@
     "**/typings.d.ts",
     "src/**/*spec.ts",
     "src/cdk/schematics/**/*",
+    "src/cdk/testing/private/**/*",
     "src/material/schematics/**/*",
     "src/material/schematics/ng-generate/theme-color/**/*.bazel",
     "src/material/schematics/ng-generate/theme-color/index_bundled.d.ts",