--- jsr166/build.xml	2015/12/16 02:29:06	1.194
+++ jsr166/build.xml	2015/12/17 23:55:06	1.195
@@ -289,6 +289,9 @@
     </patternset>
   </fileset>
 
+  <!-- ant -Djtreg.flags=-timeoutFactor:4 -->
+  <property name="jtreg.flags" value=""/>
+
   <macrodef name="run-jtreg-tests">
     <!-- ant -Djtreg9.src.dir=src/test/jtreg/util/concurrent/CompletableFuture jtreg -->
     <attribute name="source" default="7"/>
@@ -326,6 +329,7 @@
       <arg value="-automatic"/>
       <arg value="-k:!ignore"/>
       <arg line="@{jtregflags}"/>
+      <arg line="${jtreg.flags}"/>
     </jtreg>
     </sequential>
   </macrodef>