diff --git a/appium/webdriver/extensions/applications.py b/appium/webdriver/extensions/applications.py
index a6782bfa..e96b88b0 100644
--- a/appium/webdriver/extensions/applications.py
+++ b/appium/webdriver/extensions/applications.py
@@ -74,8 +74,9 @@ def install_app(self, app_path: str, **options: Any) -> Self:
         Returns:
             Union['WebDriver', 'Applications']: Self instance
         """
+        ext_name = 'mobile: installApp'
         self.execute_script(
-            'mobile: installApp',
+            ext_name,
             {
                 'app': app_path,
                 'appPath': app_path,