diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -1852,6 +1852,7 @@ def debuginstall(ui):
               % os.path.dirname(__file__))
     try:
         import bdiff, mpatch, base85, osutil
+        dir(bdiff), dir(mpatch), dir(base85), dir(osutil) # quiet pyflakes
     except Exception, inst:
         ui.write(" %s\n" % inst)
         ui.write(_(" One or more extensions could not be found"))
diff --git a/mercurial/hgweb/server.py b/mercurial/hgweb/server.py
--- a/mercurial/hgweb/server.py
+++ b/mercurial/hgweb/server.py
@@ -246,6 +246,7 @@ class _httprequesthandlerssl(_httpreques
 
 try:
     from threading import activeCount
+    activeCount() # silence pyflakes
     _mixin = SocketServer.ThreadingMixIn
 except ImportError:
     if util.safehasattr(os, "fork"):
diff --git a/tests/test-check-pyflakes.t b/tests/test-check-pyflakes.t
--- a/tests/test-check-pyflakes.t
+++ b/tests/test-check-pyflakes.t
@@ -1,11 +1,6 @@
   $ "$TESTDIR/hghave" pyflakes || exit 80
   $ cd $(dirname $TESTDIR)
   $ pyflakes mercurial hgext 2>&1 | $TESTDIR/filterpyflakes.py
-  mercurial/hgweb/server.py:*: 'activeCount' imported but unused (glob)
-  mercurial/commands.py:*: 'base85' imported but unused (glob)
-  mercurial/commands.py:*: 'bdiff' imported but unused (glob)
-  mercurial/commands.py:*: 'mpatch' imported but unused (glob)
-  mercurial/commands.py:*: 'osutil' imported but unused (glob)
   hgext/inotify/linux/__init__.py:*: 'from _inotify import *' used; unable to detect undefined names (glob)