Note that IaC Scanning requires the test stage

doc/user/application_security/iac_scanning/index.md

@@ -14,6 +14,8 @@ Currently, IaC scanning supports configuration files for Terraform, Ansible, AWS
 
 ## Requirements
 
+IaC Scanning runs in the `test` stage, which is available by default. If you redefine the stages in the `.gitlab-ci.yml` file, the `test` stage is required.
+
 To run IaC scanning jobs, by default, you need GitLab Runner with the
 [`docker`](https://docs.gitlab.com/runner/executors/docker.html) or
 [`kubernetes`](https://docs.gitlab.com/runner/install/kubernetes.html) executor.