diff --git a/csl/test.csl b/csl/test.csl
index 57d6ce32e..033dd8646 100644
--- a/csl/test.csl
+++ b/csl/test.csl
@@ -11,7 +11,7 @@
 	</info>
   <citation>
     <layout>
-      <text value="Hello World"/>
+      <text value="Hello World!"/>
     </layout>
   </citation>
 </style>