diff --git a/gerrit-acceptance-tests/tests.defs b/gerrit-acceptance-tests/tests.defs
index f125a393a3..3c8b4d5484 100644
--- a/gerrit-acceptance-tests/tests.defs
+++ b/gerrit-acceptance-tests/tests.defs
@@ -1,7 +1,7 @@
 def acceptance_tests(
     srcs,
     deps = [],
-    vm_args = ['-Xmx128m']):
+    vm_args = ['-Xmx256m']):
   for j in srcs:
     java_test(
       name = j[:-len('.java')],