diff --git a/.github/workflows/ci-helm-lint-test.yml b/.github/workflows/ci-helm-lint-test.yml
index 38a007d..8870187 100644
--- a/.github/workflows/ci-helm-lint-test.yml
+++ b/.github/workflows/ci-helm-lint-test.yml
@@ -81,4 +81,6 @@ jobs:
         id: install
         if: steps.list-changed.outputs.changed == 'true'
         run: |
-            ct install --target-branch ${{ github.event.repository.default_branch }}
+            ct install \
+              --target-branch ${{ github.event.repository.default_branch }} \
+              --helm-extra-set-args "--set=pixelfed.mail.username=test --set=pixelfed.mail.password=test"