make tmpdir env cleanup idempotent

2018-10-02 10:20:09 +02:00
parent b82d6f7a0b
commit 94829c391b
1 changed files with 1 additions and 1 deletions
--- a/src/_pytest/pytester.py
+++ b/src/_pytest/pytester.py
@@ -524,7 +524,7 @@ class Testdir(object):
        self._sys_modules_snapshot.restore()
        self._sys_path_snapshot.restore()
        self._cwd_snapshot.restore()
-        del os.environ["PYTEST_DEBUG_TEMPROOT"]
+        os.environ.pop("PYTEST_DEBUG_TEMPROOT", None)

    def __take_sys_modules_snapshot(self):
        # some zope modules used by twisted-related tests keep internal state