see if just tests actually pass

.github/workflows/coverage.yml

@@ -63,6 +63,9 @@ jobs:
         if: hashFiles('Cargo.lock') == ''
         run: cargo generate-lockfile
 
+      - name: Test
+        run: cargo test --lib --all --locked
+
       - name: Generate coverage report
         # Follow the `test-release`command in the Makefile
         # but without release mode to avoid long build times