Make sure test classes which are setting the context clear it in their tearDown methods.

samples/dms/src/test/java/DmsIntegrationTests.java

@@ -20,6 +20,10 @@ public class DmsIntegrationTests extends AbstractTransactionalDataSourceSpringCo
         return new String[] {"classpath:applicationContext-dms-shared.xml", "classpath:applicationContext-dms-insecure.xml"};
     }
 
+    public void tearDown() {
+        SecurityContextHolder.clearContext();
+    }
+
     public void setDocumentDao(DocumentDao documentDao) {
         this.documentDao = documentDao;
     }