diff --git a/.github/workflows/blank.yml b/.github/workflows/blank.yml
index ef51c11b2..d2b8c4509 100644
--- a/.github/workflows/blank.yml
+++ b/.github/workflows/blank.yml
@@ -41,5 +41,7 @@ jobs:
       - run: opam depext Lama.dev --yes --with-test
       - run: opam install . --deps-only --with-test
       - run: eval $(opam env)
+      - run: opam exec -- dune b runtime32 -j1
+      - run: opam exec -- dune test stdlib/regression -j1
       - run: opam exec -- make install
       - run: opam exec -- make regression