From 3a0f436c1a02f41af942e2d9f3d3a64f5fff3db2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christoph=20B=C3=BClter?= <cb109@users.noreply.github.com>
Date: Fri, 6 Dec 2019 08:40:49 +0100
Subject: [PATCH] Iterate a generator expression instead of a temporary list

Co-Authored-By: Bruno Oliveira <nicoddemus@gmail.com>
---
 src/_pytest/mark/legacy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/_pytest/mark/legacy.py b/src/_pytest/mark/legacy.py
index 651288cb8..766b8f9bd 100644
--- a/src/_pytest/mark/legacy.py
+++ b/src/_pytest/mark/legacy.py
@@ -63,7 +63,7 @@ class KeywordMapping:
 
         """
         subname = subname.lower()
-        names = [name.lower() for name in self._names]
+        names = (name.lower() for name in self._names)
 
         for name in names:
             if subname in name: