diff --git a/.github/workflows/additional-prod-image-tests.yml b/.github/workflows/additional-prod-image-tests.yml
index 5df6fd20f00..1631a4253fe 100644
--- a/.github/workflows/additional-prod-image-tests.yml
+++ b/.github/workflows/additional-prod-image-tests.yml
@@ -197,7 +197,7 @@ jobs:
           DEFAULT_PYTHON_VERSION: "${{ inputs.default-python-version }}"
         run: "
           cd ./docker-tests && \
-          TEST_IMAGE=\"ghcr.io/$GITHUB_REPOSITORY/$DEFAULT_BRANCH\
+          TEST_IMAGE=\"ghcr.io/${GITHUB_REPOSITORY,,}/$DEFAULT_BRANCH\
           /prod/python$DEFAULT_PYTHON_VERSION\" \
           uv run pytest tests/docker_tests/test_examples_of_prod_image_building.py -n auto --color=yes"