diff --git a/modules/activiti-mule/src/test/resources/org/activiti/engine/test/bpmn/servicetask/WebServiceTaskTest.testWebServiceInvocationWithoutDataFlow.bpmn20.xml b/modules/activiti-mule/src/test/resources/org/activiti/engine/test/bpmn/servicetask/WebServiceTaskTest.testWebServiceInvocationWithoutDataFlow.bpmn20.xml
index da431fbc6f668124e061d730591da922f775e5dd..32f9c3328b8e52af450089f0043eb9751c560937 100644
--- a/modules/activiti-mule/src/test/resources/org/activiti/engine/test/bpmn/servicetask/WebServiceTaskTest.testWebServiceInvocationWithoutDataFlow.bpmn20.xml
+++ b/modules/activiti-mule/src/test/resources/org/activiti/engine/test/bpmn/servicetask/WebServiceTaskTest.testWebServiceInvocationWithoutDataFlow.bpmn20.xml
@@ -33,7 +33,7 @@
   </process>
 
   <!-- Interface: implementationRef = QName of WSDL Port Type -->
-  <interface name="Counter Interface"> <!-- NEEDED FOR THE PORT -->
+  <interface name="Counter Interface" implementationRef="Counter"> <!-- NEEDED FOR THE PORT -->
     <!-- Operation: implementationRef = QName of WSDL Operation -->
     <operation id="incOperation" name="Increase Operation" implementationRef="inc"> <!-- NEEDED FOR THE OPERATION NAME -->
       <inMessageRef>incRequestMessage</inMessageRef>