diff --git a/src/test/resources/MandatoryTrue.yang b/src/test/resources/MandatoryTrue.yang
new file mode 100644
index 0000000..70349a0
--- /dev/null
+++ b/src/test/resources/MandatoryTrue.yang
@@ -0,0 +1,14 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    leaf invalid-interval {
+        type "uint16";
+        units "seconds";
+        description "Interval before a route is declared invalid";
+        config true;
+        mandatory true;
+        status current;
+        reference "RFC 6020";
+    }
+}
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