diff --git a/spring-ws-security/src/test/java/org/springframework/ws/soap/security/wss4j2/Wss4jTestCase.java b/spring-ws-security/src/test/java/org/springframework/ws/soap/security/wss4j2/Wss4jTestCase.java
index 12668289..9df9ad7c 100644
--- a/spring-ws-security/src/test/java/org/springframework/ws/soap/security/wss4j2/Wss4jTestCase.java
+++ b/spring-ws-security/src/test/java/org/springframework/ws/soap/security/wss4j2/Wss4jTestCase.java
@@ -154,6 +154,7 @@ public abstract class Wss4jTestCase {
 
 			SOAPModelBuilder builder = OMXMLBuilderFactory.createSOAPModelBuilder(is, null);
 			org.apache.axiom.soap.SOAPMessage soapMessage = builder.getSOAPMessage();
+			builder.detach();
 			return new AxiomSoapMessage(soapMessage, "", true, true);
 		}
 		finally {
@@ -171,6 +172,7 @@ public abstract class Wss4jTestCase {
 
 			SOAPModelBuilder builder = OMXMLBuilderFactory.createSOAPModelBuilder(is, null);
 			org.apache.axiom.soap.SOAPMessage soapMessage = builder.getSOAPMessage();
+			builder.detach();
 			return new AxiomSoapMessage(soapMessage, "", true, true);
 		}
 		finally {