diff --git a/compiler/base/parser/src/test/resources/ContainerSubStatementErrorMessage.yang b/compiler/base/parser/src/test/resources/ContainerSubStatementErrorMessage.yang
index 4726d0c..8de1660 100644
--- a/compiler/base/parser/src/test/resources/ContainerSubStatementErrorMessage.yang
+++ b/compiler/base/parser/src/test/resources/ContainerSubStatementErrorMessage.yang
@@ -12,8 +12,8 @@
         leaf ifMTU {
             type uint32;
         }
-        must "ifType != 'ethernet' or " +
-             "(ifType = 'ethernet' and ifMTU = 1500)" {
+        must "ifType != ethernet or " +
+             "(ifType = ethernet and ifMTU = 1500)" {
             description "An ethernet MTU must be 1500";
             error-message "An ethernet MTU must be 1500";
         }