diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7dcd452f..4cce2d9b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -68,8 +68,8 @@ jobs:
 
       - name: Run chart-testing (latest)
         # test with latest stable backstage-showcase release
-        run: ct install --config ct-install.yaml --helm-extra-set-args="--set=upstream.backstage.image.tag=latest"
+        run: ct install --config ct-install.yaml --helm-extra-set-args="--set=upstream.backstage.image.tag=latest,upstream.backstage.initContainers[0].image=quay.io/janus-idp/backstage-showcase:latest"
 
       - name: Run chart-testing (next)
         # test with the next backstage-showcase version (main branch)
-        run: ct install --config ct-install.yaml --helm-extra-set-args="--set=upstream.backstage.image.tag=next"
\ No newline at end of file
+        run: ct install --config ct-install.yaml --helm-extra-set-args="--set=upstream.backstage.image.tag=next,upstream.backstage.initContainers[0].image=quay.io/janus-idp/backstage-showcase:next"
\ No newline at end of file