diff --git a/Lib/test/test_charmapcodec.py b/Lib/test/test_charmapcodec.py
index ca33cdb..ca7b331 100644
--- a/Lib/test/test_charmapcodec.py
+++ b/Lib/test/test_charmapcodec.py
@@ -16,7 +16,7 @@
         print '%s == %s: OK' % (repr(a), repr(b))
 
 # test codec's full path name (see test/testcodec.py)
-codecname = 'testcodec'
+codecname = 'test.testcodec'
     
 check(unicode('abc', codecname), u'abc')
 check(unicode('xdef', codecname), u'abcdef')