diff --git a/tools/wpt/update_chromium_revision.py b/tools/wpt/update_chromium_revision.py
index ec5230c5c16075c..c27435214aabc53 100755
--- a/tools/wpt/update_chromium_revision.py
+++ b/tools/wpt/update_chromium_revision.py
@@ -85,4 +85,4 @@ def main(timeout=600.0):
 
 
 if __name__ == "__main__":
-    main()
+    main()  # type: ignore