diff --git a/src/perf/TestSerPerf.java b/src/perf/TestSerPerf.java
index d08c1ac..44215d3 100644
--- a/src/perf/TestSerPerf.java
+++ b/src/perf/TestSerPerf.java
@@ -60,7 +60,7 @@
     final Object _finalFieldBean = new FinalFieldBean();
     final Object _nonFinalBean = new NonFinalBean();
 
-    public TestSerPerf()
+    private TestSerPerf()
         throws Exception
     {
         _mapper = new ObjectMapper();