diff --git a/test_requirements.txt b/test_requirements.txt
index 15b2cec..e85a2c7 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -1,4 +1,4 @@
-pytest==3.10.0
+pytest==4.1.0
 pytest_mock>=1.6.3
 pytest_cov>=2.5.1
 tox==3.5.3