diff --git a/.github/workflows/enzyme-ci.yml b/.github/workflows/enzyme-ci.yml
index a08267fcdb725..fa44fb0eacbf0 100644
--- a/.github/workflows/enzyme-ci.yml
+++ b/.github/workflows/enzyme-ci.yml
@@ -62,4 +62,5 @@ jobs:
       - name: test Enzyme/rustbook
         working-directory: rustbook
         run: |
-          cargo +enzyme test --workspace
+          cargo +enzyme test
+          ENZYME_LOOSE_TYPES=1 cargo +enzyme test -p samples-loose-types