diff --git a/pkgs/development/python-modules/soco/default.nix b/pkgs/development/python-modules/soco/default.nix
index d039756eb811..4c938490eb4f 100644
--- a/pkgs/development/python-modules/soco/default.nix
+++ b/pkgs/development/python-modules/soco/default.nix
@@ -1,7 +1,7 @@
 { lib, buildPythonPackage, fetchPypi, xmltodict, requests
 
 # Test dependencies
-, pytest, pytestcov, coveralls, pylint, flake8, graphviz, mock, sphinx
+, pytest_3, pytestcov, coveralls, pylint, flake8, graphviz, mock, sphinx
 , sphinx_rtd_theme
 }:
 
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ xmltodict requests ];
   checkInputs = [
-    pytest pytestcov coveralls pylint flake8 graphviz mock sphinx
+    pytest_3 pytestcov coveralls pylint flake8 graphviz mock sphinx
     sphinx_rtd_theme
   ];