diff --git a/src/_pytest/fixtures.py b/src/_pytest/fixtures.py
index 66efe0f81..bfbf7bb54 100644
--- a/src/_pytest/fixtures.py
+++ b/src/_pytest/fixtures.py
@@ -2,7 +2,6 @@ from __future__ import absolute_import, division, print_function
 
 import functools
 import inspect
-import os
 import sys
 import warnings
 from collections import OrderedDict, deque, defaultdict