diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 0cc82e1..b3aed4f 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v4
     - name: Build and test Docker image
       env:
-        BEACON_EMAIL_SMTP_SERVER: ${{ secrets.SMTP_SERVER }}
+        BEACON_EMAIL_SMTP_SERVER: 'foobar'
         BEACON_EMAIL_SMTP_PORT: ${{ secrets.SMTP_PORT }}
         BEACON_EMAIL_SMTP_USERNAME: ${{ secrets.SMTP_USERNAME }}
         BEACON_EMAIL_SMTP_PASSWORD: ${{ secrets.SMTP_PASSWORD }}