diff --git a/pkgs/development/python-modules/pytest-mockservers/default.nix b/pkgs/development/python-modules/pytest-mockservers/default.nix
index 6de88632027f..4022befcb14d 100644
--- a/pkgs/development/python-modules/pytest-mockservers/default.nix
+++ b/pkgs/development/python-modules/pytest-mockservers/default.nix
@@ -31,9 +31,12 @@ buildPythonPackage rec {
     poetry-core
   ];
 
+  buildInputs = [
+    pytest
+  ];
+
   propagatedBuildInputs = [
     aiohttp
-    pytest
     pytest-asyncio
   ];