diff --git a/pkgs/development/python-modules/polars/default.nix b/pkgs/development/python-modules/polars/default.nix
index 5e82dbcf1641..5540b5a12dd3 100644
--- a/pkgs/development/python-modules/polars/default.nix
+++ b/pkgs/development/python-modules/polars/default.nix
@@ -9,7 +9,7 @@
   pkgs, # zstd hidden by python3Packages.zstd
   pytestCheckHook,
   pytest-codspeed ? null, # Not in Nixpkgs
-  pytest-cov,
+  pytest-cov-stub,
   pytest-xdist,
   pytest-benchmark,
   rustc,
@@ -229,7 +229,7 @@ buildPythonPackage rec {
     nativeCheckInputs = [
       pytestCheckHook
       pytest-codspeed
-      pytest-cov
+      pytest-cov-stub
       pytest-xdist
       pytest-benchmark
     ];