diff --git a/pkgs/development/python-modules/slowapi/default.nix b/pkgs/development/python-modules/slowapi/default.nix
index dfa583bc0d3b..089d4d2743e9 100644
--- a/pkgs/development/python-modules/slowapi/default.nix
+++ b/pkgs/development/python-modules/slowapi/default.nix
@@ -5,6 +5,7 @@
 , limits
 , mock
 , hiro
+, httpx
 , poetry-core
 , pytestCheckHook
 , pythonAtLeast
@@ -50,6 +51,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     fastapi
     hiro
+    httpx
     mock
     pytestCheckHook
     starlette