diff --git a/04 DevOps.md b/04 DevOps.md
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@@ -117,3 +117,5 @@ heroku logs --tail
 Continuous integration is the process of regularly merging code changes into the central repository. For this to work all code must be regularly checked for issues using a range of automated tools. As of the time of writing GitHub have an integrated CI tool called **Github Actions** however this is still in beta. For this lab you will be using the CI tools that are built into GitLab which is why you have already mirrored the test code to a repository on the GitLab server.
 
 Committing and pushing to trigger the workflow.
+
+When running CI you need to run headless.