diff --git a/pkgs/development/python-modules/stamina/default.nix b/pkgs/development/python-modules/stamina/default.nix
index 7b764abe8bcb..e05ab044df99 100644
--- a/pkgs/development/python-modules/stamina/default.nix
+++ b/pkgs/development/python-modules/stamina/default.nix
@@ -7,6 +7,7 @@
   hatch-vcs,
   hatchling,
 
+  dirty-equals,
   tenacity,
   typing-extensions,
 
@@ -40,6 +41,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "stamina" ];
 
   nativeCheckInputs = [
+    dirty-equals
     pytestCheckHook
     anyio
   ];