diff --git a/src/etc/testcases/taskdefs/initializeclass.xml b/src/etc/testcases/taskdefs/initializeclass.xml
index 17e7017da..10dcccf89 100644
--- a/src/etc/testcases/taskdefs/initializeclass.xml
+++ b/src/etc/testcases/taskdefs/initializeclass.xml
@@ -4,7 +4,7 @@
   <target name="all"/>
 
   <target name="forked">
-    <java fork="true" output="forkedout" 
+    <java fork="true" output="forkedout" failonerror="true"
           className="org.apache.tools.ant.taskdefs.dir1.B">
 
       <classpath>