diff --git a/tests/components/button/conftest.py b/tests/components/button/conftest.py
new file mode 100644
index 00000000000..fa7b153def5
--- /dev/null
+++ b/tests/components/button/conftest.py
@@ -0,0 +1,50 @@
+"""Fixtures for the button entity component tests."""
+import logging
+
+import pytest
+
+from homeassistant.components.button import DOMAIN, ButtonEntity
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+
+from .const import TEST_DOMAIN
+
+from tests.common import MockEntity, MockPlatform, mock_platform
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class MockButtonEntity(MockEntity, ButtonEntity):
+    """Mock Button class."""
+
+    def press(self) -> None:
+        """Press the button."""
+        _LOGGER.info("The button has been pressed")
+
+
+@pytest.fixture
+async def setup_platform(hass: HomeAssistant) -> None:
+    """Set up the button entity platform."""
+
+    async def async_setup_platform(
+        hass: HomeAssistant,
+        config: ConfigType,
+        async_add_entities: AddEntitiesCallback,
+        discovery_info: DiscoveryInfoType | None = None,
+    ) -> None:
+        """Set up test button platform."""
+        async_add_entities(
+            [
+                MockButtonEntity(
+                    name="button 1",
+                    unique_id="unique_button_1",
+                ),
+            ]
+        )
+
+    mock_platform(
+        hass,
+        f"{TEST_DOMAIN}.{DOMAIN}",
+        MockPlatform(async_setup_platform=async_setup_platform),
+    )
diff --git a/tests/components/button/const.py b/tests/components/button/const.py
new file mode 100644
index 00000000000..9cb21e53550
--- /dev/null
+++ b/tests/components/button/const.py
@@ -0,0 +1,3 @@
+"""Constants for the button entity component tests."""
+
+TEST_DOMAIN = "test"
diff --git a/tests/components/button/test_init.py b/tests/components/button/test_init.py
index 5290d145d69..caddfe93814 100644
--- a/tests/components/button/test_init.py
+++ b/tests/components/button/test_init.py
@@ -1,5 +1,4 @@
 """The tests for the Button component."""
-
 from collections.abc import Generator
 from datetime import timedelta
 from unittest.mock import MagicMock
@@ -26,6 +25,8 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.setup import async_setup_component
 from homeassistant.util import dt as dt_util
 
+from .const import TEST_DOMAIN
+
 from tests.common import (
     MockConfigEntry,
     MockModule,
@@ -36,8 +37,6 @@ from tests.common import (
     mock_restore_cache,
 )
 
-TEST_DOMAIN = "test"
-
 
 async def test_button(hass: HomeAssistant) -> None:
     """Test getting data from the mocked button entity."""
@@ -60,11 +59,9 @@ async def test_custom_integration(
     caplog: pytest.LogCaptureFixture,
     enable_custom_integrations: None,
     freezer: FrozenDateTimeFactory,
+    setup_platform: None,
 ) -> None:
     """Test we integration."""
-    platform = getattr(hass.components, f"test.{DOMAIN}")
-    platform.init()
-
     assert await async_setup_component(hass, DOMAIN, {DOMAIN: {CONF_PLATFORM: "test"}})
     await hass.async_block_till_done()
 
@@ -98,14 +95,11 @@ async def test_custom_integration(
 
 
 async def test_restore_state(
-    hass: HomeAssistant, enable_custom_integrations: None
+    hass: HomeAssistant, enable_custom_integrations: None, setup_platform: None
 ) -> None:
     """Test we restore state integration."""
     mock_restore_cache(hass, (State("button.button_1", "2021-01-01T23:59:59+00:00"),))
 
-    platform = getattr(hass.components, f"test.{DOMAIN}")
-    platform.init()
-
     assert await async_setup_component(hass, DOMAIN, {DOMAIN: {CONF_PLATFORM: "test"}})
     await hass.async_block_till_done()
 
@@ -113,14 +107,11 @@ async def test_restore_state(
 
 
 async def test_restore_state_does_not_restore_unavailable(
-    hass: HomeAssistant, enable_custom_integrations: None
+    hass: HomeAssistant, enable_custom_integrations: None, setup_platform: None
 ) -> None:
     """Test we restore state integration except for unavailable."""
     mock_restore_cache(hass, (State("button.button_1", STATE_UNAVAILABLE),))
 
-    platform = getattr(hass.components, f"test.{DOMAIN}")
-    platform.init()
-
     assert await async_setup_component(hass, DOMAIN, {DOMAIN: {CONF_PLATFORM: "test"}})
     await hass.async_block_till_done()
 
diff --git a/tests/testing_config/custom_components/test/button.py b/tests/testing_config/custom_components/test/button.py
deleted file mode 100644
index 8daf3a741a1..00000000000
--- a/tests/testing_config/custom_components/test/button.py
+++ /dev/null
@@ -1,47 +0,0 @@
-"""Provide a mock button platform.
-
-Call init before using it in your tests to ensure clean test data.
-"""
-
-import logging
-
-from homeassistant.components.button import ButtonEntity
-
-from tests.common import MockEntity
-
-UNIQUE_BUTTON_1 = "unique_button_1"
-
-ENTITIES = []
-
-_LOGGER = logging.getLogger(__name__)
-
-
-class MockButtonEntity(MockEntity, ButtonEntity):
-    """Mock Button class."""
-
-    def press(self) -> None:
-        """Press the button."""
-        _LOGGER.info("The button has been pressed")
-
-
-def init(empty=False):
-    """Initialize the platform with entities."""
-    global ENTITIES
-
-    ENTITIES = (
-        []
-        if empty
-        else [
-            MockButtonEntity(
-                name="button 1",
-                unique_id="unique_button_1",
-            ),
-        ]
-    )
-
-
-async def async_setup_platform(
-    hass, config, async_add_entities_callback, discovery_info=None
-):
-    """Return mock entities."""
-    async_add_entities_callback(ENTITIES)