diff --git a/scripts/ci/test-aio.sh b/scripts/ci/test-aio.sh
index 11d7967b76..84bfe46fbb 100755
--- a/scripts/ci/test-aio.sh
+++ b/scripts/ci/test-aio.sh
@@ -24,13 +24,17 @@ source ${thisDir}/_travis-fold.sh
     yarn test-pwa-score-localhost
   travisFoldEnd "test.aio.pwaScore"
 
+  # Check the bundle sizes.
+  # (Run before unit and e2e tests, which destroy the `dist/` directory.)
+  travisFoldStart "test.aio.payload-size"
+    yarn payload-size
+  travisFoldEnd "test.aio.payload-size"
 
   # Run unit tests
   travisFoldStart "test.aio.unit"
     yarn test
   travisFoldEnd "test.aio.unit"
 
-
   # Run e2e tests
   travisFoldStart "test.aio.e2e"
     yarn e2e