diff --git a/entrypoint.sh b/entrypoint.sh
index b7febd2..d019901 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -16,6 +16,11 @@ CEPH_CONF=/tmp/ceph/ceph.conf
 # set defaults if they are currently unset in the environment
 : "${GO_CEPH_TEST_REQUIRE_MOUNT:=yes}"
 
+# Default env vars that are not currently changed by this script
+# but can be used to change the test behavior:
+# GO_CEPH_TEST_MOUNT_DIR
+# GO_CEPH_TEST_MDS_NAME
+
 CLI="$(getopt -o h --long test-run:,test-pkg:,pause,cpuprofile,memprofile,no-cover,micro-osd:,results:,ceph-conf:,help -n "${0}" -- "$@")"
 eval set -- "${CLI}"
 while true ; do