fix build to properly omit **/failing/*.java
diff --git a/pom.xml b/pom.xml
index eebb3da..fdcad1a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,7 +69,7 @@
         <configuration>
           <redirectTestOutputToFile>${surefire.redirectTestOutputToFile}</redirectTestOutputToFile>
           <excludes>
-            <exclude>failing/*.java</exclude>
+            <exclude>**/failing/*.java</exclude>
           </excludes>
         </configuration>
       </plugin>