diff --git a/pkgs/development/python-modules/aiohomematic-test-support/default.nix b/pkgs/development/python-modules/aiohomematic-test-support/default.nix
new file mode 100644
index 000000000000..4121f93725a2
--- /dev/null
+++ b/pkgs/development/python-modules/aiohomematic-test-support/default.nix
@@ -0,0 +1,28 @@
+{
+  aiohomematic,
+  buildPythonPackage,
+  setuptools,
+}:
+
+buildPythonPackage rec {
+  pname = "aiohomematic-test-support";
+  inherit (aiohomematic) version src;
+  pyproject = true;
+
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail 'dynamic = ["version"]' 'version = "${version}"'
+  '';
+
+  sourceRoot = "${src.name}/aiohomematic_test_support";
+
+  build-system = [ setuptools ];
+
+  pythonImportsCheck = [ "aiohomematic_test_support" ];
+
+  meta = {
+    description = "Support-only package for AioHomematic (tests/dev)";
+    homepage = "https://github.com/SukramJ/aiohomematic/tree/devel/aiohomematic_test_support";
+    inherit (aiohomematic.meta) license maintainers;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 41059f238981..f22805eed7cc 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -296,6 +296,8 @@ self: super: with self; {
 
   aiohomematic = callPackage ../development/python-modules/aiohomematic { };
 
+  aiohomematic-test-support = callPackage ../development/python-modules/aiohomematic-test-support { };
+
   aiohttp = callPackage ../development/python-modules/aiohttp { };
 
   aiohttp-apispec = callPackage ../development/python-modules/aiohttp-apispec { };