diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0a06c3f..367c7d2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,6 +19,8 @@ jobs:
       run: sudo apt install -y libcmocka-dev
     - name: configure
       run: ./configure
+    - name: list conf.h for testing
+      run cat src/conf.h
     - name: build tests
       run: cd src && touch .accepted && make test
     - name: build