diff --git a/.github/workflows/docker_release.yml b/.github/workflows/docker_release.yml
index a9a9d58bc..70238a63e 100644
--- a/.github/workflows/docker_release.yml
+++ b/.github/workflows/docker_release.yml
@@ -51,7 +51,7 @@ jobs:
         run: |
           EXPECTED_VERSION=$(cat VERSION.txt)
           function test_image {
-            local TAG, PLATFORM, VERSION
+            local TAG PLATFORM VERSION
             TAG=$1
             PLATFORM=$2
             VERSION=$(docker run --platform "$PLATFORM" --rm "deepset/haystack:$TAG" python -c"import haystack; print(haystack.__version__)")