diff --git a/esphome/components/esp8266/gpio.cpp b/esphome/components/esp8266/gpio.cpp
index 17a495bc1d7..124df39ce3d 100644
--- a/esphome/components/esp8266/gpio.cpp
+++ b/esphome/components/esp8266/gpio.cpp
@@ -8,11 +8,13 @@ namespace esphome::esp8266 {
 static const char *const TAG = "esp8266";
 
 static int flags_to_mode(gpio::Flags flags, uint8_t pin) {
-  if (flags == gpio::FLAG_INPUT) {  // NOLINT(bugprone-branch-clone)
-    return INPUT;
-  } else if (flags == gpio::FLAG_OUTPUT) {
+  if (flags == gpio::FLAG_OUTPUT || flags == (gpio::FLAG_OUTPUT | gpio::FLAG_INPUT)) {
     return OUTPUT;
-  } else if (flags == (gpio::FLAG_INPUT | gpio::FLAG_PULLUP)) {
+  }
+  if (flags == gpio::FLAG_INPUT) {
+    return INPUT;
+  }
+  if (flags == (gpio::FLAG_INPUT | gpio::FLAG_PULLUP)) {
     if (pin == 16) {
       // GPIO16 doesn't have a pullup, so pinMode would fail.
       // However, sometimes this method is called with pullup mode anyway
@@ -21,13 +23,14 @@ static int flags_to_mode(gpio::Flags flags, uint8_t pin) {
       return INPUT;
     }
     return INPUT_PULLUP;
-  } else if (flags == (gpio::FLAG_INPUT | gpio::FLAG_PULLDOWN)) {
-    return INPUT_PULLDOWN_16;
-  } else if (flags == (gpio::FLAG_OUTPUT | gpio::FLAG_OPEN_DRAIN)) {
-    return OUTPUT_OPEN_DRAIN;
-  } else {
-    return 0;
   }
+  if (flags == (gpio::FLAG_INPUT | gpio::FLAG_PULLDOWN)) {
+    return INPUT_PULLDOWN_16;
+  }
+  if (flags == (gpio::FLAG_OUTPUT | gpio::FLAG_OPEN_DRAIN)) {
+    return OUTPUT_OPEN_DRAIN;
+  }
+  return INPUT;
 }
 
 struct ISRPinArg {
diff --git a/esphome/components/mqtt/__init__.py b/esphome/components/mqtt/__init__.py
index 1fc0c30db1c..237ed2ce385 100644
--- a/esphome/components/mqtt/__init__.py
+++ b/esphome/components/mqtt/__init__.py
@@ -55,6 +55,7 @@ from esphome.const import (
     PLATFORM_BK72XX,
     PLATFORM_ESP32,
     PLATFORM_ESP8266,
+    PLATFORM_RTL87XX,
     PlatformFramework,
 )
 from esphome.core import CORE, CoroPriority, coroutine_with_priority
@@ -316,7 +317,7 @@ CONFIG_SCHEMA = cv.All(
         }
     ),
     validate_config,
-    cv.only_on([PLATFORM_ESP32, PLATFORM_ESP8266, PLATFORM_BK72XX]),
+    cv.only_on([PLATFORM_ESP32, PLATFORM_ESP8266, PLATFORM_BK72XX, PLATFORM_RTL87XX]),
     _consume_mqtt_sockets,
 )
 
diff --git a/script/helpers.py b/script/helpers.py
index 1039ef39ac2..06a50a30923 100644
--- a/script/helpers.py
+++ b/script/helpers.py
@@ -630,7 +630,12 @@ def get_all_dependencies(component_names: set[str]) -> set[str]:
     Returns:
         Set of all components including dependencies and auto-loaded components
     """
-    from esphome.const import KEY_CORE
+    from esphome.const import (
+        KEY_CORE,
+        KEY_TARGET_FRAMEWORK,
+        KEY_TARGET_PLATFORM,
+        PLATFORM_HOST,
+    )
     from esphome.core import CORE
     from esphome.loader import get_component
 
@@ -642,7 +647,10 @@ def get_all_dependencies(component_names: set[str]) -> set[str]:
     # Set up fake config path for component loading
     root = Path(__file__).parent.parent
     CORE.config_path = root
-    CORE.data[KEY_CORE] = {}
+    CORE.data[KEY_CORE] = {
+        KEY_TARGET_PLATFORM: PLATFORM_HOST,
+        KEY_TARGET_FRAMEWORK: "host-native",
+    }
 
     # Keep finding dependencies until no new ones are found
     while True:
diff --git a/tests/components/mqtt/test.rtl87xx-ard.yaml b/tests/components/mqtt/test.rtl87xx-ard.yaml
new file mode 100644
index 00000000000..25cb37a0b42
--- /dev/null
+++ b/tests/components/mqtt/test.rtl87xx-ard.yaml
@@ -0,0 +1,2 @@
+packages:
+  common: !include common.yaml
diff --git a/tests/test_build_components/build_components_base.rtl87xx-ard.yaml b/tests/test_build_components/build_components_base.rtl87xx-ard.yaml
new file mode 100644
index 00000000000..1720ef700dd
--- /dev/null
+++ b/tests/test_build_components/build_components_base.rtl87xx-ard.yaml
@@ -0,0 +1,15 @@
+esphome:
+  name: componenttestesprtl87xx
+  friendly_name: $component_name
+
+rtl87xx:
+  board: generic-rtl8710bn-2mb-788k
+
+logger:
+  level: VERY_VERBOSE
+
+packages:
+  component_under_test: !include
+    file: $component_test_file
+    vars:
+      component_test_file: $component_test_file