Releng: JDT tests need more heap these days
diff --git a/releng/build-scripts/build/run.properties b/releng/build-scripts/build/run.properties
index acd55c3..09f7f14 100644
--- a/releng/build-scripts/build/run.properties
+++ b/releng/build-scripts/build/run.properties
@@ -13,7 +13,7 @@
 #vm.args=-Xmx256m
 
 # this one is used by eclipse junit tests:
-vmargs=-Xmx768m -XX:-UseGCOverheadLimit
+vmargs=-Xmx1200m -XX:-UseGCOverheadLimit
 
 # Version dependent names: