Try config from cms

tests/acceptance.suite.dist.yml

@@ -20,9 +20,10 @@ modules:
         JoomlaBrowser:
             url: 'http://localhost/tests/joomla'     # the url that points to the joomla installation at /tests/system/joomla-cms
             browser: 'chrome'
-            window_size: 1024x768
+            window_size: false
             capabilities:
-              unexpectedAlertBehaviour: 'accept'
+                'goog:chromeOptions':
+                    args: ["headless", "disable-gpu", "no-sandbox", "window-size=1920x1080"]
             username: 'admin'                      # UserName for the Administrator
             password: 'admin'                      # Password for the Administrator
             database host: 'localhost'             # place where the Application is Hosted #server Address