diff --git a/tests/example-schema.yang b/tests/example-schema.yang
index cbd5d8d..f876779 100644
--- a/tests/example-schema.yang
+++ b/tests/example-schema.yang
@@ -57,6 +57,7 @@
     }
 
     leaf leafDecimal {
+        units "nm";
         type decimal64 {
             fraction-digits 9;
         }