diff --git a/esphome/components/esp32/__init__.py b/esphome/components/esp32/__init__.py
index 161803eaf4..8214886f8c 100644
--- a/esphome/components/esp32/__init__.py
+++ b/esphome/components/esp32/__init__.py
@@ -417,7 +417,7 @@ def copy_files():
         )
 
     dir = os.path.dirname(__file__)
-    post_build_file = os.path.join(dir, "post_build.py")
+    post_build_file = os.path.join(dir, "post_build.py.script")
     copy_file_if_changed(
         post_build_file,
         CORE.relative_build_path("post_build.py"),
diff --git a/esphome/components/esp32/post_build.py b/esphome/components/esp32/post_build.py.script
similarity index 100%
rename from esphome/components/esp32/post_build.py
rename to esphome/components/esp32/post_build.py.script
diff --git a/esphome/components/esp8266/__init__.py b/esphome/components/esp8266/__init__.py
index 34a4a2fadb..7182042770 100644
--- a/esphome/components/esp8266/__init__.py
+++ b/esphome/components/esp8266/__init__.py
@@ -220,7 +220,7 @@ async def to_code(config):
 def copy_files():
 
     dir = os.path.dirname(__file__)
-    post_build_file = os.path.join(dir, "post_build.py")
+    post_build_file = os.path.join(dir, "post_build.py.script")
     copy_file_if_changed(
         post_build_file,
         CORE.relative_build_path("post_build.py"),
diff --git a/esphome/components/esp8266/post_build.py b/esphome/components/esp8266/post_build.py.script
similarity index 100%
rename from esphome/components/esp8266/post_build.py
rename to esphome/components/esp8266/post_build.py.script