diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4c91d3a..3205ccf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,4 +19,6 @@ jobs:
         export PG_CONFIG=`which pg_config`
         sudo --preserve-env=PG_CONFIG make install
     - run: make installcheck
+    - if: ${{ failure() }}
+      run: cat regression.diffs
     - run: make prove_installcheck