diff --git a/pkgs/servers/isso/default.nix b/pkgs/servers/isso/default.nix
index 7428d2d6cbba..26bec1355f12 100644
--- a/pkgs/servers/isso/default.nix
+++ b/pkgs/servers/isso/default.nix
@@ -66,14 +66,10 @@ buildPythonApplication rec {
   '';
 
   nativeCheckInputs = [
-    pytest
-    pytest-cov
+    pytestCheckHook
+    pytest-cov-stub
   ];
 
-  checkPhase = ''
-    pytest
-  '';
-
   passthru.tests = { inherit (nixosTests) isso; };
 
   meta = with lib; {