diff --git a/commons/testing/jarexec/src/main/java/org/apache/stanbol/commons/testing/jarexec/JarExecutor.java b/commons/testing/jarexec/src/main/java/org/apache/stanbol/commons/testing/jarexec/JarExecutor.java
index 03c2a884b..0a96d1ce4 100644
--- a/commons/testing/jarexec/src/main/java/org/apache/stanbol/commons/testing/jarexec/JarExecutor.java
+++ b/commons/testing/jarexec/src/main/java/org/apache/stanbol/commons/testing/jarexec/JarExecutor.java
@@ -72,13 +72,9 @@ public int getServerPort() {
         return serverPort;
     }
 
-    public static JarExecutor getInstance(Properties config) throws ExecutorException {
+    public synchronized static JarExecutor getInstance(Properties config) throws ExecutorException {
         if (instance == null) {
-            synchronized (JarExecutor.class) {
-                if (instance == null) {
-                    instance = new JarExecutor(config);
-                }
-            }
+            instance = new JarExecutor(config);
         }
         return instance;
     }