diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7815e0b..6cdd783 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,6 +27,11 @@ jobs:
           fetch-depth: 0 # for proper signature verification
           submodules: true # for shunit2
 
+      - name: Run ShellCheck
+        uses: ludeeus/action-shellcheck@master
+        with:
+          ignore: tests/shunit2
+
       - name: Build debian image
         run: |
           docker build . \
@@ -56,11 +61,6 @@ jobs:
       - name: Test alpine image
         run: tests/run $IMAGE_NAME:alpine
 
-      - name: Run ShellCheck
-        uses: ludeeus/action-shellcheck@master
-        with:
-          ignore: tests/shunit2
-
       - name: Verify signature
         if: github.ref == 'refs/heads/master'
         uses: atmoz/git-verify-ref@master