diff --git a/roles/mailman/files/post-update.sh b/roles/mailman/files/post-update.sh
index 29532439c2..cc1db847ef 100755
--- a/roles/mailman/files/post-update.sh
+++ b/roles/mailman/files/post-update.sh
@@ -25,7 +25,7 @@ $BASEDIR/bin/pg-give-rights.py > /dev/null
 restorecon -r "$BASEDIR"
 
 # Run unit tests
-django-admin test --pythonpath $CONFDIR --settings settings_test hyperkitty
+django-admin test --pythonpath $CONFDIR --settings settings_test hyperkitty postorius
 
 # Reload Apache to flush the python cache
 systemctl reload httpd
diff --git a/roles/mailman/files/settings_test.py b/roles/mailman/files/settings_test.py
index 30a515164d..ca4fa6ecbb 100644
--- a/roles/mailman/files/settings_test.py
+++ b/roles/mailman/files/settings_test.py
@@ -16,3 +16,11 @@ DATABASES = {
         'NAME': ':memory:',
     }
 }
+
+# Mailman API credentials for testing Postorius
+MAILMAN_API_URL = 'http://localhost:9001'
+MAILMAN_USER = 'restadmin'
+MAILMAN_PASS = 'restpass'
+
+VCR_RECORD_MODE = 'once'
+USE_SSL = False