From 053c052190ef757a660c715c110e88a8e053ef04 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <tgoodlet@gmail.com>
Date: Fri, 1 Apr 2016 01:20:22 -0400
Subject: [PATCH] Always lstrip() keyword expression

---
 _pytest/mark.py            | 2 +-
 testing/acceptance_test.py | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/_pytest/mark.py b/_pytest/mark.py
index 1a7635402..d8b60def3 100644
--- a/_pytest/mark.py
+++ b/_pytest/mark.py
@@ -58,7 +58,7 @@ pytest_cmdline_main.tryfirst = True
 
 
 def pytest_collection_modifyitems(items, config):
-    keywordexpr = config.option.keyword
+    keywordexpr = config.option.keyword.lstrip()
     matchexpr = config.option.markexpr
     if not keywordexpr and not matchexpr:
         return
diff --git a/testing/acceptance_test.py b/testing/acceptance_test.py
index 9bc3a191a..4e9645037 100644
--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -670,6 +670,11 @@ class TestDurations:
             "*call*test_1*",
         ])
 
+    def test_with_not(self, testdir):
+        testdir.makepyfile(self.source)
+        result = testdir.runpytest("-k not 1")
+        assert result.ret == 0
+
 
 class TestDurationWithFixture:
     source = """