diff --git a/supervisor/arch.py b/supervisor/arch.py
index adbeb996e..e1a176117 100644
--- a/supervisor/arch.py
+++ b/supervisor/arch.py
@@ -28,6 +28,7 @@ class CpuArch(CoreSysAttributes):
         """Initialize CPU Architecture handler."""
         self.coresys = coresys
         self._supported_arch: list[str] = []
+        self._supported_set: set[str] = set()
         self._default_arch: str
 
     @property
@@ -70,9 +71,11 @@ class CpuArch(CoreSysAttributes):
         if native_support not in self._supported_arch:
             self._supported_arch.append(native_support)
 
+        self._supported_set = set(self._supported_arch)
+
     def is_supported(self, arch_list: list[str]) -> bool:
         """Return True if there is a supported arch by this platform."""
-        return not set(self.supported).isdisjoint(set(arch_list))
+        return not self._supported_set.isdisjoint(arch_list)
 
     def match(self, arch_list: list[str]) -> str:
         """Return best match for this CPU/Platform."""
diff --git a/tests/addons/test_addon.py b/tests/addons/test_addon.py
index e419f601d..112bc445e 100644
--- a/tests/addons/test_addon.py
+++ b/tests/addons/test_addon.py
@@ -12,7 +12,6 @@ from securetar import SecureTarFile
 from supervisor.addons.addon import Addon
 from supervisor.addons.const import AddonBackupMode
 from supervisor.addons.model import AddonModel
-from supervisor.arch import CpuArch
 from supervisor.const import AddonState, BusEvent
 from supervisor.coresys import CoreSys
 from supervisor.docker.addon import DockerAddon
@@ -197,19 +196,17 @@ async def test_watchdog_on_stop(coresys: CoreSys, install_addon_ssh: Addon) -> N
         restart.assert_called_once()
 
 
-async def test_listener_attached_on_install(coresys: CoreSys, repository):
+async def test_listener_attached_on_install(
+    coresys: CoreSys, mock_amd64_arch_supported: None, repository
+):
     """Test events listener attached on addon install."""
     coresys.hardware.disk.get_disk_free_space = lambda x: 5000
     container_collection = MagicMock()
     container_collection.get.side_effect = DockerException()
     with patch(
-        "supervisor.arch.CpuArch.supported", new=PropertyMock(return_value=["amd64"])
-    ), patch(
         "supervisor.docker.manager.DockerAPI.containers",
         new=PropertyMock(return_value=container_collection),
-    ), patch(
-        "pathlib.Path.is_dir", return_value=True
-    ), patch(
+    ), patch("pathlib.Path.is_dir", return_value=True), patch(
         "supervisor.addons.addon.Addon.need_build", new=PropertyMock(return_value=False)
     ), patch(
         "supervisor.addons.model.AddonModel.with_ingress",
@@ -556,6 +553,7 @@ async def test_restore(
     status: str,
     tmp_supervisor_data,
     path_extern,
+    mock_aarch64_arch_supported: None,
 ) -> None:
     """Test restoring an addon."""
     coresys.hardware.disk.get_disk_free_space = lambda x: 5000
@@ -563,9 +561,7 @@ async def test_restore(
     await install_addon_ssh.load()
 
     tarfile = SecureTarFile(get_fixture_path(f"backup_local_ssh_{status}.tar.gz"), "r")
-    with patch.object(DockerAddon, "is_running", return_value=False), patch.object(
-        CpuArch, "supported", new=PropertyMock(return_value=["aarch64"])
-    ):
+    with patch.object(DockerAddon, "is_running", return_value=False):
         start_task = await coresys.addons.restore(TEST_ADDON_SLUG, tarfile)
 
     assert bool(start_task) is (status == "running")
@@ -577,6 +573,7 @@ async def test_restore_while_running(
     container: MagicMock,
     tmp_supervisor_data,
     path_extern,
+    mock_aarch64_arch_supported: None,
 ):
     """Test restore of a running addon."""
     container.status = "running"
@@ -586,8 +583,8 @@ async def test_restore_while_running(
 
     tarfile = SecureTarFile(get_fixture_path("backup_local_ssh_stopped.tar.gz"), "r")
     with patch.object(DockerAddon, "is_running", return_value=True), patch.object(
-        CpuArch, "supported", new=PropertyMock(return_value=["aarch64"])
-    ), patch.object(Ingress, "update_hass_panel"):
+        Ingress, "update_hass_panel"
+    ):
         start_task = await coresys.addons.restore(TEST_ADDON_SLUG, tarfile)
 
     assert bool(start_task) is False
@@ -600,6 +597,7 @@ async def test_restore_while_running_with_watchdog(
     container: MagicMock,
     tmp_supervisor_data,
     path_extern,
+    mock_aarch64_arch_supported: None,
 ):
     """Test restore of a running addon with watchdog interference."""
     container.status = "running"
@@ -619,8 +617,6 @@ async def test_restore_while_running_with_watchdog(
     with patch.object(Addon, "start") as start, patch.object(
         Addon, "restart"
     ) as restart, patch.object(DockerAddon, "stop", new=mock_stop), patch.object(
-        CpuArch, "supported", new=PropertyMock(return_value=["aarch64"])
-    ), patch.object(
         Ingress, "update_hass_panel"
     ):
         await coresys.addons.restore(TEST_ADDON_SLUG, tarfile)
@@ -650,16 +646,18 @@ async def test_start_when_running(
 
 
 async def test_local_example_install(
-    coresys: CoreSys, container: MagicMock, tmp_supervisor_data: Path, repository
+    coresys: CoreSys,
+    container: MagicMock,
+    tmp_supervisor_data: Path,
+    repository,
+    mock_aarch64_arch_supported: None,
 ):
     """Test install of an addon."""
     assert not (
         data_dir := tmp_supervisor_data / "addons" / "data" / "local_example"
     ).exists()
 
-    with patch.object(
-        CpuArch, "supported", new=PropertyMock(return_value=["aarch64"])
-    ), patch.object(DockerAddon, "install") as install:
+    with patch.object(DockerAddon, "install") as install:
         await coresys.addons.install("local_example")
         install.assert_called_once()
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 140b5080c..170cd6368 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -320,6 +320,7 @@ async def coresys(
 
     # Mock test client
     coresys_obj.arch._default_arch = "amd64"
+    coresys_obj.arch._supported_set = {"amd64"}
     coresys_obj._machine = "qemux86-64"
     coresys_obj._machine_id = uuid4()
 
@@ -695,3 +696,17 @@ async def container(docker: DockerAPI) -> MagicMock:
     addon.status = "stopped"
     addon.attrs = {"State": {"ExitCode": 0}}
     yield addon
+
+
+@pytest.fixture
+def mock_amd64_arch_supported(coresys: CoreSys) -> None:
+    """Mock amd64 arch as supported."""
+    with patch.object(coresys.arch, "_supported_set", {"amd64"}):
+        yield
+
+
+@pytest.fixture
+def mock_aarch64_arch_supported(coresys: CoreSys) -> None:
+    """Mock aarch64 arch as supported."""
+    with patch.object(coresys.arch, "_supported_set", {"aarch64"}):
+        yield
diff --git a/tests/test_arch.py b/tests/test_arch.py
index cb9a9a86f..193356fe7 100644
--- a/tests/test_arch.py
+++ b/tests/test_arch.py
@@ -111,6 +111,10 @@ async def test_yellow_arch(coresys, sys_machine, sys_supervisor):
 
     assert coresys.arch.default == "aarch64"
     assert coresys.arch.supported == ["aarch64", "armv7", "armhf"]
+    assert coresys.arch.is_supported(["aarch64"]) is True
+    assert coresys.arch.is_supported(["armv7"]) is True
+    assert coresys.arch.is_supported(["armhf"]) is True
+    assert coresys.arch.is_supported(["x86_64", "i386"]) is False
 
 
 async def test_green_arch(coresys, sys_machine, sys_supervisor):