diff --git a/Lib/test/test_wsgiref.py b/Lib/test/test_wsgiref.py
index b7d4c86f722..88d4a3d6832 100644
--- a/Lib/test/test_wsgiref.py
+++ b/Lib/test/test_wsgiref.py
@@ -245,6 +245,7 @@ class UtilityTests(TestCase):
     def testAppURIs(self):
         self.checkAppURI("http://127.0.0.1/")
         self.checkAppURI("http://127.0.0.1/spam", SCRIPT_NAME="/spam")
+        self.checkAppURI("http://127.0.0.1/sp%E4m", SCRIPT_NAME="/sp\xe4m")
         self.checkAppURI("http://spam.example.com:2071/",
             HTTP_HOST="spam.example.com:2071", SERVER_PORT="2071")
         self.checkAppURI("http://spam.example.com/",
@@ -258,14 +259,19 @@ class UtilityTests(TestCase):
     def testReqURIs(self):
         self.checkReqURI("http://127.0.0.1/")
         self.checkReqURI("http://127.0.0.1/spam", SCRIPT_NAME="/spam")
+        self.checkReqURI("http://127.0.0.1/sp%E4m", SCRIPT_NAME="/sp\xe4m")
         self.checkReqURI("http://127.0.0.1/spammity/spam",
             SCRIPT_NAME="/spammity", PATH_INFO="/spam")
+        self.checkReqURI("http://127.0.0.1/spammity/sp%E4m",
+            SCRIPT_NAME="/spammity", PATH_INFO="/sp\xe4m")
         self.checkReqURI("http://127.0.0.1/spammity/spam;ham",
             SCRIPT_NAME="/spammity", PATH_INFO="/spam;ham")
         self.checkReqURI("http://127.0.0.1/spammity/spam;cookie=1234,5678",
             SCRIPT_NAME="/spammity", PATH_INFO="/spam;cookie=1234,5678")
         self.checkReqURI("http://127.0.0.1/spammity/spam?say=ni",
             SCRIPT_NAME="/spammity", PATH_INFO="/spam",QUERY_STRING="say=ni")
+        self.checkReqURI("http://127.0.0.1/spammity/spam?s%E4y=ni",
+            SCRIPT_NAME="/spammity", PATH_INFO="/spam",QUERY_STRING="s%E4y=ni")
         self.checkReqURI("http://127.0.0.1/spammity/spam", 0,
             SCRIPT_NAME="/spammity", PATH_INFO="/spam",QUERY_STRING="say=ni")