diff --git a/.github/workflows/k8s-publish-test-base-image.yaml b/.github/workflows/k8s-publish-test-base-image.yaml
index 72225d863..096156172 100644
--- a/.github/workflows/k8s-publish-test-base-image.yaml
+++ b/.github/workflows/k8s-publish-test-base-image.yaml
@@ -16,6 +16,17 @@ jobs:
       BASE_IMAGE_TAG: ${{ secrets.QA_AWS_ACCOUNT_NUMBER }}.dkr.ecr.${{ secrets.QA_AWS_REGION }}.amazonaws.com/test-base-image:${{ github.ref_name }}
     steps:
       - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+
+      - name: Strip slashes after colon in tag using Python
+        id: strip_tag
+        run: |
+          ref_name="${GITHUB_REF##*/}"
+          echo "ref_name: ${ref_name}"
+          # Use Python to replace slashes after the first colon
+          modified_tag=$(python3 -c 'import sys; ref_name = sys.argv[1]; modified = ref_name.split(":")[0] + ":" + ref_name.split(":")[1].replace("/", "-"); print(modified)' "$ref_name")
+          echo "modified tag: ${ref_name}"
+          echo "BASE_IMAGE_TAG=${{ secrets.QA_AWS_ACCOUNT_NUMBER }}.dkr.ecr.${{ secrets.QA_AWS_REGION }}.amazonaws.com/test-base-image:$modified_tag" >> $GITHUB_ENV
+
       - name: Build Base Image
         uses: smartcontractkit/chainlink-github-actions/docker/build-push@e29366cdecfe6befff9ab8c3cfe4825218505d58 # v2.3.16
         with: