diff --git a/core/src/test/java/org/apache/struts2/util/StrutsUtilTest.java b/core/src/test/java/org/apache/struts2/util/StrutsUtilTest.java
index f6a0debe92..de1ce844d7 100644
--- a/core/src/test/java/org/apache/struts2/util/StrutsUtilTest.java
+++ b/core/src/test/java/org/apache/struts2/util/StrutsUtilTest.java
@@ -268,7 +268,7 @@ protected void tearDown() throws Exception {
 
     // === internal class to assist in testing
 
-    static class InternalMockHttpServletRequest extends MockHttpServletRequest {
+    protected static class InternalMockHttpServletRequest extends MockHttpServletRequest {
         InternalMockRequestDispatcher dispatcher = null;
         public RequestDispatcher getRequestDispatcher(String path) {
             dispatcher = new InternalMockRequestDispatcher(path);
@@ -280,8 +280,8 @@ public InternalMockRequestDispatcher getDispatcher() {
         }
     }
 
-    static class InternalMockRequestDispatcher extends MockRequestDispatcher {
-        private String url;
+    protected static class InternalMockRequestDispatcher extends MockRequestDispatcher {
+        private final String url;
         boolean included = false;
         public InternalMockRequestDispatcher(String url) {
             super(url);