diff --git a/build-system/test-configs/dep-check-config.js b/build-system/test-configs/dep-check-config.js
index 3183df485fbc5..277e9d6639b55 100644
--- a/build-system/test-configs/dep-check-config.js
+++ b/build-system/test-configs/dep-check-config.js
@@ -99,6 +99,7 @@ exports.rules = [
       '3p/**->src/core/types/string/url.js',
       '3p/**->src/log.js',
       '3p/**->src/core/dom/style.js',
+      '3p/**->src/core/mode/index.js',
       '3p/**->src/url.js',
       '3p/**->src/config.js',
       '3p/**->src/mode.js',
@@ -138,6 +139,7 @@ exports.rules = [
       'ads/**->src/url.js',
       'ads/**->src/core/dom/static-template.js',
       'ads/**->src/core/dom/style.js',
+      'ads/**->src/core/mode/index.js',
       // ads/google/a4a doesn't contain 3P ad code and should probably move
       // somewhere else at some point
       'ads/google/a4a/**->src/ad-cid.js',