diff --git a/Lib/test/test_binhex.py b/Lib/test/test_binhex.py
index 4dfe14e..a2b2a2c 100755
--- a/Lib/test/test_binhex.py
+++ b/Lib/test/test_binhex.py
@@ -31,6 +31,7 @@
 
     f = open(fname1, 'r')
     finish = f.readline()
+    f.close()   # on Windows an open file cannot be unlinked
 
     if start != finish:
         print 'Error: binhex != hexbin'