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/development/python-modules/aiohomematic/default.nix b/pkgs/development/python-modules/aiohomematic/default.nix
index 363dbf4fc3ce..b5c0f4bf18fb 100644
--- a/pkgs/development/python-modules/aiohomematic/default.nix
+++ b/pkgs/development/python-modules/aiohomematic/default.nix
@@ -16,21 +16,16 @@
 
 buildPythonPackage rec {
   pname = "aiohomematic";
-  version = "2025.10.5";
+  version = "2025.11.5";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "SukramJ";
     repo = "aiohomematic";
     tag = version;
-    hash = "sha256-DgLeshxPo2ZwQXe8pSg81kFLviEWKakOY8DtdQH/H58=";
+    hash = "sha256-bqhuh+9rcqKreZCc3WJPFR1i3Y8mjtLER/bLlbMp6xc=";
   };
 
-  postPatch = ''
-    substituteInPlace pyproject.toml \
-      --replace-fail "setuptools==80.9.0" "setuptools"
-  '';
-
   build-system = [ setuptools ];
 
   dependencies = [
@@ -50,11 +45,6 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "aiohomematic" ];
 
-  disabledTests = [
-    # AssertionError: assert 548 == 555
-    "test_central_full"
-  ];
-
   meta = {
     description = "Module to interact with HomeMatic devices";
     homepage = "https://github.com/SukramJ/aiohomematic";
diff --git a/pkgs/servers/home-assistant/custom-components/homematicip_local/package.nix b/pkgs/servers/home-assistant/custom-components/homematicip_local/package.nix
index 27863dcaf353..f0a178c08d2b 100644
--- a/pkgs/servers/home-assistant/custom-components/homematicip_local/package.nix
+++ b/pkgs/servers/home-assistant/custom-components/homematicip_local/package.nix
@@ -1,21 +1,25 @@
 {
   lib,
+  async-upnp-client,
   buildHomeAssistantComponent,
   fetchFromGitHub,
   aiohomematic,
+  aiohomematic-test-support,
   home-assistant,
+  pytest-homeassistant-custom-component,
+  pytestCheckHook,
 }:
 
 buildHomeAssistantComponent rec {
   owner = "SukramJ";
   domain = "homematicip_local";
-  version = "1.89.1";
+  version = "1.90.0";
 
   src = fetchFromGitHub {
     owner = "SukramJ";
     repo = "custom_homematic";
     tag = version;
-    hash = "sha256-40t64RAJy/isLfcP71pKiqh3cFXy/s1Mv35NosPnh48=";
+    hash = "sha256-tdOxZWofsb2loN1ItQNeEwjIR4divLidyiyAgze6hqw=";
   };
 
   postPatch = ''
@@ -29,6 +33,18 @@ buildHomeAssistantComponent rec {
     aiohomematic
   ];
 
+  nativeCheckInputs = [
+    aiohomematic-test-support
+    async-upnp-client
+    pytest-homeassistant-custom-component
+    pytestCheckHook
+  ];
+
+  disabledTests = [
+    # custom_components.homematicip_local.support.InvalidConfig: C
+    "test_async_validate_config_and_get_system_information"
+  ];
+
   meta = {
     changelog = "https://github.com/SukramJ/custom_homematic/blob/${src.tag}/changelog.md";
     description = "Custom Home Assistant Component for HomeMatic";
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 { };