diff --git a/build.env b/build.env
index 085a6e584..d2674d951 100644
--- a/build.env
+++ b/build.env
@@ -33,3 +33,8 @@ HELM_VERSION=v3.1.2
 MINIKUBE_VERSION=v1.6.0
 VM_DRIVER=none
 CHANGE_MINIKUBE_NONE_USER=true
+
+# e2e settings
+# - enable CEPH_CSI_RUN_ALL_TESTS when running tests with if it has root
+#   permissions on the host
+#CEPH_CSI_RUN_ALL_TESTS=true