diff --git a/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/AbstractDoSFilterTest.java b/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/AbstractDoSFilterTest.java
index 3774a28bf8f..c2f4bcfff08 100644
--- a/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/AbstractDoSFilterTest.java
+++ b/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/AbstractDoSFilterTest.java
@@ -169,6 +169,7 @@ public abstract class AbstractDoSFilterTest
     {
         Thread other = new Thread()
         {
+            @Override
             public void run()
             {
                 try
@@ -204,6 +205,7 @@ public abstract class AbstractDoSFilterTest
     {
         Thread other = new Thread()
         {
+            @Override
             public void run()
             {
                 try
@@ -284,7 +286,7 @@ public abstract class AbstractDoSFilterTest
 
         assertEquals(11,count(responses,"HTTP/1.1 200 OK"));
         int delayedRequests = count(responses,"DoSFilter: delayed");
-        assertTrue(delayedRequests >= 2 && delayedRequests <= 3);
+        assertTrue("delayedRequests: " + delayedRequests + " is not between 2 and 3",delayedRequests >= 2 && delayedRequests <= 3);
     }
 
     @Test
@@ -302,6 +304,7 @@ public abstract class AbstractDoSFilterTest
 
     public static class TestServlet extends HttpServlet implements Servlet
     {
+        @Override
         protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
         {
             if (request.getParameter("session")!=null)
diff --git a/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/DoSFilterTest.java b/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/DoSFilterTest.java
index a68c11f7569..a214ce33971 100644
--- a/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/DoSFilterTest.java
+++ b/jetty-servlets/src/test/java/org/eclipse/jetty/servlets/DoSFilterTest.java
@@ -14,12 +14,17 @@
 
 package org.eclipse.jetty.servlets;
 
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.eclipse.jetty.servlets.DoSFilter.RateTracker;
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 import org.junit.BeforeClass;
+import org.junit.Test;
 
 public class DoSFilterTest extends AbstractDoSFilterTest
 {
@@ -33,6 +38,7 @@ public class DoSFilterTest extends AbstractDoSFilterTest
 
     public static class DoSFilter2 extends DoSFilter
     {
+        @Override
         public void closeConnection(HttpServletRequest request, HttpServletResponse response, Thread thread)
         {
             try {
@@ -45,4 +51,31 @@ public class DoSFilterTest extends AbstractDoSFilterTest
             }
         }
     }
+
+    @Test
+    public void isRateExceededTest() throws InterruptedException
+    {
+        DoSFilter doSFilter = new DoSFilter();
+
+        boolean exceeded = hitRateTracker(doSFilter,0);
+        assertTrue("Last hit should have exceeded",exceeded);
+
+        int sleep = 250;
+        exceeded = hitRateTracker(doSFilter,sleep);
+        assertFalse("Should not exceed as we sleep 300s for each hit and thus do less than 4 hits/s",exceeded);
+    }
+
+    private boolean hitRateTracker(DoSFilter doSFilter, int sleep) throws InterruptedException
+    {
+        boolean exceeded = false;
+        RateTracker rateTracker = doSFilter.new RateTracker("test2",0,4);
+
+        for (int i = 0; i < 5; i++)
+        {
+            Thread.sleep(sleep);
+            if (rateTracker.isRateExceeded(System.currentTimeMillis()))
+                exceeded = true;
+        }
+        return exceeded;
+    }
 }