diff --git a/site/content/en/docs/contrib/tests.en.md b/site/content/en/docs/contrib/tests.en.md
index d6dc8bf62c..5b2d70c058 100644
--- a/site/content/en/docs/contrib/tests.en.md
+++ b/site/content/en/docs/contrib/tests.en.md
@@ -96,6 +96,12 @@ check functionality of minikube after evaluating podman-env
 #### validateStartWithProxy
 makes sure minikube start respects the HTTP_PROXY environment variable
 
+#### validateStartWithCustomCerts
+makes sure minikube start respects the HTTPS_PROXY environment variable and works with custom certs
+a proxy is started by calling the mitmdump binary in the background, then installing the certs generated by the binary
+mitmproxy/dump creates the proxy at localhost at port 8080
+only runs on Github Actions for amd64 linux, otherwise validateStartWithProxy runs instead
+
 #### validateAuditAfterStart
 makes sure the audit log contains the correct logging after minikube start