diff --git a/hack/module.sh b/hack/module.sh
index 596137cec..2d2e970f6 100755
--- a/hack/module.sh
+++ b/hack/module.sh
@@ -52,7 +52,7 @@ function with_modules() {
 
 function usage() {
   echo "Error: <task> must be specified"
-  echo "       do.sh <task> [tidy, lint, test]"
+  echo "       do.sh <task> [tidy, lint, test, unittest]"
   exit 1
 }