diff --git a/conformance/update_failure_list.py b/conformance/update_failure_list.py
index 63f453df1b..ad42ed3c18 100755
--- a/conformance/update_failure_list.py
+++ b/conformance/update_failure_list.py
@@ -35,7 +35,6 @@ This is sort of like comm(1), except it recognizes comments and ignores them.
 """
 
 import argparse
-import fileinput
 
 parser = argparse.ArgumentParser(
     description='Adds/removes failures from the failure list.')
@@ -62,7 +61,8 @@ for remove_file in (args.remove_list or []):
 
 add_list = sorted(add_set, reverse=True)
 
-existing_list = file(args.filename).read()
+with open(args.filename) as in_file:
+    existing_list = in_file.read()
 
 with open(args.filename, "w") as f:
   for line in existing_list.splitlines(True):