diff --git a/pkgs/development/python-modules/devpi-common/default.nix b/pkgs/development/python-modules/devpi-common/default.nix
index 185ab310510a..4a070a578731 100644
--- a/pkgs/development/python-modules/devpi-common/default.nix
+++ b/pkgs/development/python-modules/devpi-common/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, requests, py, pytest }:
+{ lib, buildPythonPackage, fetchPypi, requests, py, pytest, pytest-flakes }:
 
 buildPythonPackage rec {
   pname = "devpi-common";
@@ -10,7 +10,7 @@ buildPythonPackage rec {
   };
 
   propagatedBuildInputs = [ requests py ];
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest pytest-flakes ];
 
   checkPhase = ''
     py.test