diff --git a/releng/org.eclipse.tm.releng/testing.properties b/releng/org.eclipse.tm.releng/testing.properties
index adb2a936112..d181f5ea583 100644
--- a/releng/org.eclipse.tm.releng/testing.properties
+++ b/releng/org.eclipse.tm.releng/testing.properties
@@ -1,5 +1,5 @@
-#extraVMargs=-Dorg.eclipse.swt.browser.XULRunnerPath=/shared/common/mozilla-xulrunner181-1.8.1.4-30.ppc
-extraVMargs=-Dorg.eclipse.swt.browser.XULRunnerPath=/dev/null
+extraVMargs=-Dorg.eclipse.swt.browser.XULRunnerPath=/shared/common/mozilla-xulrunner181-1.8.1.4-30.ppc
+#extraVMargs=-Dorg.eclipse.swt.browser.XULRunnerPath=/dev/null
 #name of runtime to install and test
 #runtime=${zipPrefix}-ALL${incubation}-${buildAlias}.zip