diff --git a/pkgs/development/python-modules/localstack-client/default.nix b/pkgs/development/python-modules/localstack-client/default.nix
index 020b8eed6334..97cbd9968a10 100644
--- a/pkgs/development/python-modules/localstack-client/default.nix
+++ b/pkgs/development/python-modules/localstack-client/default.nix
@@ -3,6 +3,9 @@
 , fetchFromGitHub
 , boto3
 , pytestCheckHook
+
+# downstream dependencies
+, localstack
 }:
 
 buildPythonPackage rec {
@@ -39,6 +42,10 @@ buildPythonPackage rec {
   # For tests
   __darwinAllowLocalNetworking = true;
 
+  passthru.tests = {
+    inherit localstack;
+  };
+
   meta = with lib; {
     description = "A lightweight Python client for LocalStack";
     homepage = "https://github.com/localstack/localstack-python-client";
diff --git a/pkgs/development/python-modules/localstack-ext/default.nix b/pkgs/development/python-modules/localstack-ext/default.nix
index 02cc6cbf218d..a3d323edf983 100644
--- a/pkgs/development/python-modules/localstack-ext/default.nix
+++ b/pkgs/development/python-modules/localstack-ext/default.nix
@@ -9,6 +9,9 @@
 , python-jose
 , requests
 , tabulate
+
+# Sensitive downstream dependencies
+, localstack
 }:
 
 buildPythonPackage rec {
@@ -50,6 +53,10 @@ buildPythonPackage rec {
   # No tests in repo
   doCheck = false;
 
+  passthru.tests = {
+    inherit localstack;
+  };
+
   meta = with lib; {
     description = "Extensions for LocalStack";
     homepage = "https://github.com/localstack/localstack";