Spell out `f` and `xs`

1 files changed, 2 insertions, 2 deletions

diff --git a/testtools/testresult/real.py b/testtools/testresult/real.py
index a2be0a6..665d301 100644
--- a/testtools/testresult/real.py
+++ b/testtools/testresult/real.py
@@ -384,9 +384,9 @@ class StreamResult(object):
         """
 
 
-def strict_map(f, xs):
+def strict_map(function, items):
     """A version of 'map' that's guaranteed to run on all inputs."""
-    return list(map(f, xs))
+    return list(map(function, items))
 
 
 class CopyStreamResult(StreamResult):