Remove usage of backticks.
diff --git a/Lib/wsgiref/headers.py b/Lib/wsgiref/headers.py
index 0908f60..c364b26 100644
--- a/Lib/wsgiref/headers.py
+++ b/Lib/wsgiref/headers.py
@@ -140,7 +140,7 @@
         return self._headers[:]
 
     def __repr__(self):
-        return "Headers(%s)" % `self._headers`
+        return "Headers(%r)" % self._headers
 
     def __str__(self):
         """str() returns the formatted headers, complete with end line,
diff --git a/Lib/wsgiref/simple_server.py b/Lib/wsgiref/simple_server.py
index 95996cc..e6c9f38 100644
--- a/Lib/wsgiref/simple_server.py
+++ b/Lib/wsgiref/simple_server.py
@@ -169,7 +169,7 @@
     print >>stdout
     h = environ.items(); h.sort()
     for k,v in h:
-        print >>stdout, k,'=',`v`
+        print >>stdout, k,'=',repr(v)
     start_response("200 OK", [('Content-Type','text/plain')])
     return [stdout.getvalue()]