diff -r 9df8c729e2e7 -r 44ed220ef26f mercurial/hgweb/hgweb_mod.py
--- a/mercurial/hgweb/hgweb_mod.py	Sat Aug 22 13:58:59 2015 -0700
+++ b/mercurial/hgweb/hgweb_mod.py	Sat Aug 22 14:22:40 2015 -0700
@@ -138,7 +138,7 @@
         else:
             return repo.filtered('served')
 
-    def refresh(self, request=None):
+    def refresh(self, request):
         repostate = []
         # file of interrests mtime and size
         for meth, fname in foi:
@@ -163,8 +163,8 @@
             self.repostate = repostate
             # mtime is needed for ETag
             self.mtime = st.st_mtime
-        if request:
-            self.repo.ui.environ = request.env
+
+        self.repo.ui.environ = request.env
 
     def run(self):
         """Start a server from CGI environment.