diff --git a/pkgs/development/python-modules/venusian/default.nix b/pkgs/development/python-modules/venusian/default.nix
index fe22b42716df..fb81a79f10e3 100644
--- a/pkgs/development/python-modules/venusian/default.nix
+++ b/pkgs/development/python-modules/venusian/default.nix
@@ -2,6 +2,7 @@
 , buildPythonPackage
 , fetchPypi
 , pytest
+, pytestcov
 }:
 
 buildPythonPackage rec {
@@ -13,7 +14,7 @@ buildPythonPackage rec {
     sha256 = "f6842b7242b1039c0c28f6feef29016e7e7dd3caaeb476a193acf737db31ee38";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest pytestcov ];
 
   checkPhase = ''
     pytest