diff --git a/user/test/com/google/gwt/emultest/java/util/HashMapBenchmark.java b/user/test/com/google/gwt/emultest/java/util/HashMapBenchmark.java
index e1486e1..f35e371 100644
--- a/user/test/com/google/gwt/emultest/java/util/HashMapBenchmark.java
+++ b/user/test/com/google/gwt/emultest/java/util/HashMapBenchmark.java
@@ -192,7 +192,7 @@
     testHashMapStringAdds(size);
   }
 
-  protected void initMap() {
-    map = new HashMap<Object, Object>();
+  protected void initMap(Integer size) {
+    map = new HashMap<Object, Object>(size);
   }
 }