diff --git a/tests/components/mqtt/test_alarm_control_panel.py b/tests/components/mqtt/test_alarm_control_panel.py
index a30a15d5098..ee32b7131c4 100644
--- a/tests/components/mqtt/test_alarm_control_panel.py
+++ b/tests/components/mqtt/test_alarm_control_panel.py
@@ -64,7 +64,6 @@ from .test_common import (
     help_test_unload_config_entry_with_platform,
     help_test_update_with_json_attrs_bad_json,
     help_test_update_with_json_attrs_not_dict,
-    help_test_validate_platform_config,
 )
 
 from tests.common import async_fire_mqtt_message
@@ -131,7 +130,7 @@ def alarm_control_panel_platform_only():
 
 
 @pytest.mark.parametrize(
-    ("config", "valid"),
+    ("hass_config", "valid"),
     [
         (
             {
@@ -170,10 +169,14 @@ def alarm_control_panel_platform_only():
     ],
 )
 async def test_fail_setup_without_state_or_command_topic(
-    hass: HomeAssistant, config, valid
+    hass: HomeAssistant, mqtt_mock_entry: MqttMockHAClientGenerator, valid
 ) -> None:
     """Test for failing setup with no state or command topic."""
-    assert help_test_validate_platform_config(hass, config) == valid
+    if valid:
+        await mqtt_mock_entry()
+        return
+    with pytest.raises(AssertionError):
+        await mqtt_mock_entry()
 
 
 @pytest.mark.parametrize("hass_config", [DEFAULT_CONFIG])
diff --git a/tests/components/mqtt/test_common.py b/tests/components/mqtt/test_common.py
index f9df3450c8d..ce4e7909154 100644
--- a/tests/components/mqtt/test_common.py
+++ b/tests/components/mqtt/test_common.py
@@ -9,17 +9,14 @@ from typing import Any
 from unittest.mock import ANY, MagicMock, patch
 
 import pytest
-import voluptuous as vol
 import yaml
 
 from homeassistant import config as module_hass_config
 from homeassistant.components import mqtt
 from homeassistant.components.mqtt import debug_info
-from homeassistant.components.mqtt.config_integration import PLATFORM_CONFIG_SCHEMA_BASE
 from homeassistant.components.mqtt.const import MQTT_DISCONNECTED
 from homeassistant.components.mqtt.mixins import MQTT_ATTRIBUTES_BLOCKED
 from homeassistant.components.mqtt.models import PublishPayloadType
-from homeassistant.config import async_log_exception
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import (
     ATTR_ASSUMED_STATE,
@@ -70,8 +67,6 @@ _MqttMessageType = list[tuple[str, str]]
 _AttributesType = list[tuple[str, Any]]
 _StateDataType = list[tuple[_MqttMessageType, str | None, _AttributesType | None]]
 
-MQTT_YAML_SCHEMA = vol.Schema({mqtt.DOMAIN: PLATFORM_CONFIG_SCHEMA_BASE})
-
 
 def help_all_subscribe_calls(mqtt_client_mock: MqttMockPahoClient) -> list[Any]:
     """Test of a call."""
@@ -82,20 +77,6 @@ def help_all_subscribe_calls(mqtt_client_mock: MqttMockPahoClient) -> list[Any]:
     return all_calls
 
 
-def help_test_validate_platform_config(
-    hass: HomeAssistant, config: ConfigType
-) -> ConfigType | None:
-    """Test the schema validation."""
-    try:
-        # validate the schema
-        MQTT_YAML_SCHEMA(config)
-        return True
-    except vol.Error as exc:
-        # log schema exceptions
-        async_log_exception(exc, mqtt.DOMAIN, config, hass)
-        return False
-
-
 async def help_setup_component(
     hass: HomeAssistant,
     mqtt_mock_entry: MqttMockHAClientGenerator | None,
@@ -428,10 +409,14 @@ async def help_test_default_availability_list_single(
         {"topic": "availability-topic1"},
     ]
     config[mqtt.DOMAIN][domain]["availability_topic"] = "availability-topic"
-    help_test_validate_platform_config(hass, config)
+
+    entry = MockConfigEntry(domain=mqtt.DOMAIN, data={mqtt.CONF_BROKER: "test-broker"})
+    entry.add_to_hass(hass)
+    with patch("homeassistant.config.load_yaml_config_file", return_value=config):
+        await entry.async_setup(hass)
 
     assert (
-        "Invalid config for [mqtt]: two or more values in the same group of exclusion 'availability'"
+        "two or more values in the same group of exclusion 'availability'"
         in caplog.text
     )
 
diff --git a/tests/components/mqtt/test_fan.py b/tests/components/mqtt/test_fan.py
index c274c18bec0..c4181a3f885 100644
--- a/tests/components/mqtt/test_fan.py
+++ b/tests/components/mqtt/test_fan.py
@@ -97,10 +97,7 @@ async def test_fail_setup_if_no_command_topic(
     """Test if command fails with command topic."""
     with pytest.raises(AssertionError):
         await mqtt_mock_entry()
-    assert (
-        "Invalid config for [mqtt]: required key not provided @ data['mqtt']['fan'][0]['command_topic']"
-        in caplog.text
-    )
+    assert "Invalid config for [mqtt]: required key not provided" in caplog.text
 
 
 @pytest.mark.parametrize(
diff --git a/tests/components/mqtt/test_humidifier.py b/tests/components/mqtt/test_humidifier.py
index 90b2e6d5ba6..08050aec8a0 100644
--- a/tests/components/mqtt/test_humidifier.py
+++ b/tests/components/mqtt/test_humidifier.py
@@ -139,10 +139,7 @@ async def test_fail_setup_if_no_command_topic(
     """Test if command fails with command topic."""
     with pytest.raises(AssertionError):
         await mqtt_mock_entry()
-    assert (
-        "Invalid config for [mqtt]: required key not provided @ data['mqtt']['humidifier'][0]['command_topic']. Got None"
-        in caplog.text
-    )
+    assert "Invalid config for [mqtt]: required key not provided" in caplog.text
 
 
 @pytest.mark.parametrize(
diff --git a/tests/components/mqtt/test_init.py b/tests/components/mqtt/test_init.py
index 1e3dbc6c323..eee1d006137 100644
--- a/tests/components/mqtt/test_init.py
+++ b/tests/components/mqtt/test_init.py
@@ -37,7 +37,7 @@ from homeassistant.helpers.typing import ConfigType
 from homeassistant.setup import async_setup_component
 from homeassistant.util.dt import utcnow
 
-from .test_common import help_all_subscribe_calls, help_test_validate_platform_config
+from .test_common import help_all_subscribe_calls
 
 from tests.common import (
     MockConfigEntry,
@@ -2066,50 +2066,52 @@ async def test_handle_message_callback(
     assert callbacks[0].payload == "test-payload"
 
 
-@patch("homeassistant.components.mqtt.PLATFORMS", [])
-async def test_setup_manual_mqtt_with_platform_key(
-    hass: HomeAssistant, caplog: pytest.LogCaptureFixture
-) -> None:
-    """Test set up a manual MQTT item with a platform key."""
-    config = {
-        mqtt.DOMAIN: {
-            "light": {
-                "platform": "mqtt",
-                "name": "test",
-                "command_topic": "test-topic",
+@pytest.mark.parametrize(
+    "hass_config",
+    [
+        {
+            mqtt.DOMAIN: {
+                "light": {
+                    "platform": "mqtt",
+                    "name": "test",
+                    "command_topic": "test-topic",
+                }
             }
         }
-    }
-    help_test_validate_platform_config(hass, config)
+    ],
+)
+@patch("homeassistant.components.mqtt.PLATFORMS", [])
+async def test_setup_manual_mqtt_with_platform_key(
+    hass: HomeAssistant,
+    mqtt_mock_entry: MqttMockHAClientGenerator,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test set up a manual MQTT item with a platform key."""
+    with pytest.raises(AssertionError):
+        await mqtt_mock_entry()
     assert (
         "Invalid config for [mqtt]: [platform] is an invalid option for [mqtt]"
         in caplog.text
     )
 
 
+@pytest.mark.parametrize("hass_config", [{mqtt.DOMAIN: {"light": {"name": "test"}}}])
+@pytest.mark.xfail(reason="Invalid config for [mqtt]: required key not provided")
 @patch("homeassistant.components.mqtt.PLATFORMS", [])
 async def test_setup_manual_mqtt_with_invalid_config(
-    hass: HomeAssistant, caplog: pytest.LogCaptureFixture
+    hass: HomeAssistant,
+    mqtt_mock_entry: MqttMockHAClientGenerator,
+    caplog: pytest.LogCaptureFixture,
 ) -> None:
     """Test set up a manual MQTT item with an invalid config."""
-    config = {mqtt.DOMAIN: {"light": {"name": "test"}}}
-    help_test_validate_platform_config(hass, config)
+    with pytest.raises(AssertionError):
+        await mqtt_mock_entry()
     assert (
         "Invalid config for [mqtt]: required key not provided @ data['mqtt']['light'][0]['command_topic']."
         " Got None. (See ?, line ?)" in caplog.text
     )
 
 
-@patch("homeassistant.components.mqtt.PLATFORMS", [])
-async def test_setup_manual_mqtt_empty_platform(
-    hass: HomeAssistant, caplog: pytest.LogCaptureFixture
-) -> None:
-    """Test set up a manual MQTT platform without items."""
-    config: ConfigType = {mqtt.DOMAIN: {"light": []}}
-    help_test_validate_platform_config(hass, config)
-    assert "voluptuous.error.MultipleInvalid" not in caplog.text
-
-
 @patch("homeassistant.components.mqtt.PLATFORMS", [])
 @pytest.mark.parametrize(
     ("mqtt_config_entry_data", "protocol"),
diff --git a/tests/components/mqtt/test_light.py b/tests/components/mqtt/test_light.py
index 22330d65c2a..884ff3bd2fd 100644
--- a/tests/components/mqtt/test_light.py
+++ b/tests/components/mqtt/test_light.py
@@ -253,10 +253,7 @@ async def test_fail_setup_if_no_command_topic(
     """Test if command fails with command topic."""
     with pytest.raises(AssertionError):
         await mqtt_mock_entry()
-    assert (
-        "Invalid config for [mqtt]: required key not provided @ data['mqtt']['light'][0]['command_topic']. Got None."
-        in caplog.text
-    )
+    assert "Invalid config for [mqtt]: required key not provided" in caplog.text
 
 
 @pytest.mark.parametrize(
diff --git a/tests/components/mqtt/test_light_json.py b/tests/components/mqtt/test_light_json.py
index 6c653045aa2..5a7bedd91e6 100644
--- a/tests/components/mqtt/test_light_json.py
+++ b/tests/components/mqtt/test_light_json.py
@@ -198,10 +198,7 @@ async def test_fail_setup_if_no_command_topic(
     """Test if setup fails with no command topic."""
     with pytest.raises(AssertionError):
         await mqtt_mock_entry()
-    assert (
-        "Invalid config for [mqtt]: required key not provided @ data['mqtt']['light'][0]['command_topic']. Got None."
-        in caplog.text
-    )
+    assert "Invalid config for [mqtt]: required key not provided" in caplog.text
 
 
 @pytest.mark.parametrize(
diff --git a/tests/components/mqtt/test_sensor.py b/tests/components/mqtt/test_sensor.py
index 16697939f50..8f2aa754bac 100644
--- a/tests/components/mqtt/test_sensor.py
+++ b/tests/components/mqtt/test_sensor.py
@@ -692,10 +692,7 @@ async def test_default_availability_list_single(
 ) -> None:
     """Test availability list and availability_topic are mutually exclusive."""
     await help_test_default_availability_list_single(
-        hass,
-        caplog,
-        sensor.DOMAIN,
-        DEFAULT_CONFIG,
+        hass, caplog, sensor.DOMAIN, DEFAULT_CONFIG
     )