diff --git a/pkgs/development/python-modules/orjson/default.nix b/pkgs/development/python-modules/orjson/default.nix
index 5ceddcfdd394..ede3b10fc718 100644
--- a/pkgs/development/python-modules/orjson/default.nix
+++ b/pkgs/development/python-modules/orjson/default.nix
@@ -19,6 +19,13 @@
 , pytz
 , xxhash
 , python
+
+# for passthru.tests
+, falcon
+, fastapi
+, gradio
+, mashumaro
+, ufolib2
 }:
 
 buildPythonPackage rec {
@@ -67,6 +74,16 @@ buildPythonPackage rec {
     "orjson"
   ];
 
+  passthru.tests = {
+    inherit
+      falcon
+      fastapi
+      gradio
+      mashumaro
+      ufolib2
+    ;
+  };
+
   meta = with lib; {
     description = "Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy";
     homepage = "https://github.com/ijl/orjson";