diff --git a/build.xml b/build.xml
index 945fff751c..8f87abde05 100644
--- a/build.xml
+++ b/build.xml
@@ -1048,6 +1048,7 @@
         <jvmarg value="-Dstorage-config=${test.conf}"/>
         <jvmarg value="-Daccess.properties=${test.conf}/access.properties"/>
         <jvmarg value="-Dlog4j.configuration=log4j-junit.properties" />
+        <jvmarg value="-Djava.awt.headless=true"/>
         <jvmarg value="-javaagent:${basedir}/lib/jamm-0.2.5.jar" />
         <jvmarg value="-ea"/>
         <optjvmargs/>