diff --git a/coderunner/checkstyle/config.xml b/coderunner/checkstyle/config.xml
index 01a5dd32f13e102a80ec96d963b209f5e5f1d49f..ec3b985752ff2e9a59806d6bc4d83281ab52af42 100644
--- a/coderunner/checkstyle/config.xml
+++ b/coderunner/checkstyle/config.xml
@@ -270,6 +270,7 @@
             <property name="allowedAnnotations" value="Override, Test"/>
             <property name="allowMissingParamTags" value="false" />
             <property name="allowMissingReturnTag" value="false" />
+            <property name="allowUnknownTags" value="false" />
             <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF, COMPACT_CTOR_DEF"/>
         </module>
         <module name="JavadocContentLocationCheck">