diff --git a/build.xml b/build.xml
index 70740495..96f63a1c 100644
--- a/build.xml
+++ b/build.xml
@@ -119,14 +119,14 @@ class Version { public static String VERSION = "${VERSION}";}
 
 <target name="test" depends="compile,testcompile"
 	description="run the regression tests" >
-	<java classname="org.umlgraph.test.BasicTest" fork="true">
+	<java classname="org.umlgraph.test.BasicTest" fork="true" failonerror="true">
          <classpath>
            <pathelement location="${env.JAVA_HOME}/lib/tools.jar"/>
            <pathelement location="${build}"/>
            <pathelement location="${lib}/UmlGraph.jar"/>
          </classpath>
     </java>
-	<java classname="org.umlgraph.test.UmlDocTest" fork="true">
+	<java classname="org.umlgraph.test.UmlDocTest" fork="true" failonerror="true">
 	         <classpath>
 	           <pathelement location="${env.JAVA_HOME}/lib/tools.jar"/>
 	           <pathelement location="${build}"/>
diff --git a/src/test/java/org/umlgraph/test/UmlDocTest.java b/src/test/java/org/umlgraph/test/UmlDocTest.java
index 19b7551c..d470b4f5 100644
--- a/src/test/java/org/umlgraph/test/UmlDocTest.java
+++ b/src/test/java/org/umlgraph/test/UmlDocTest.java
@@ -148,10 +148,11 @@ private static void compareDocletOutputs(List<String> differences, File refFolde
     private static void runDoclet(String[] options) {
 	pw.print("Run javadoc -doclet " + doclet);
 	for (String o : options)
-	    pw.print(o + " ");
+	    pw.print(" " + o);
 	pw.println();
 	com.sun.tools.javadoc.Main.execute("UMLDoc test", pw, pw, pw,
 		doclet, options);
+	System.exit(0);
     }
 
 }