diff --git a/jetty-server/src/test/java/org/eclipse/jetty/server/RequestTest.java b/jetty-server/src/test/java/org/eclipse/jetty/server/RequestTest.java
index 95ab4110069..39a617c9cd7 100644
--- a/jetty-server/src/test/java/org/eclipse/jetty/server/RequestTest.java
+++ b/jetty-server/src/test/java/org/eclipse/jetty/server/RequestTest.java
@@ -148,6 +148,32 @@ public class RequestTest
         assertTrue(responses.startsWith("HTTP/1.1 200"));
     }
 
+    @Test
+    public void testParamExtraction_BadSequence() throws Exception
+    {
+        _handler._checker = new RequestTester()
+        {
+            @Override
+            public boolean check(HttpServletRequest request,HttpServletResponse response)
+            {
+                Map<String, String[]> map = request.getParameterMap();
+                // should have thrown a BadMessageException
+                return false;
+            }
+        };
+
+        //Send a request with query string with illegal hex code to cause
+        //an exception parsing the params
+        String request="GET /?test_%e0%x8%81=missing HTTP/1.1\r\n"+
+                "Host: whatever\r\n"+
+                "Content-Type: text/html;charset=utf8\n"+
+                "Connection: close\n"+
+                "\n";
+
+        String responses=_connector.getResponses(request);
+        assertThat("Responses", responses, startsWith("HTTP/1.1 400"));
+    }
+
     @Test
     public void testEmptyHeaders() throws Exception
     {