diff --git a/tools/wptrunner/wptrunner/browsers/android_weblayer.py b/tools/wptrunner/wptrunner/browsers/android_weblayer.py
index f75587d839fffcf..6110450b7282c6c 100644
--- a/tools/wptrunner/wptrunner/browsers/android_weblayer.py
+++ b/tools/wptrunner/wptrunner/browsers/android_weblayer.py
@@ -47,7 +47,6 @@ def executor_kwargs(test_type, server_config, cache_manager, run_info_data,
                                              cache_manager, run_info_data,
                                              **kwargs)
     del executor_kwargs["capabilities"]["goog:chromeOptions"]["prefs"]
-    del executor_kwargs["capabilities"]["goog:chromeOptions"]["useAutomationExtension"]
     capabilities = executor_kwargs["capabilities"]
     # Note that for WebLayer, we launch a test shell and have the test shell use
     # WebLayer.
diff --git a/tools/wptrunner/wptrunner/browsers/android_webview.py b/tools/wptrunner/wptrunner/browsers/android_webview.py
index 8790567707e957a..d0773873508fe7f 100644
--- a/tools/wptrunner/wptrunner/browsers/android_webview.py
+++ b/tools/wptrunner/wptrunner/browsers/android_webview.py
@@ -47,7 +47,6 @@ def executor_kwargs(test_type, server_config, cache_manager, run_info_data,
                                              cache_manager, run_info_data,
                                              **kwargs)
     del executor_kwargs["capabilities"]["goog:chromeOptions"]["prefs"]
-    del executor_kwargs["capabilities"]["goog:chromeOptions"]["useAutomationExtension"]
     capabilities = executor_kwargs["capabilities"]
     # Note that for WebView, we launch a test shell and have the test shell use WebView.
     # https://chromium.googlesource.com/chromium/src/+/HEAD/android_webview/docs/webview-shell.md
diff --git a/tools/wptrunner/wptrunner/browsers/chrome_android.py b/tools/wptrunner/wptrunner/browsers/chrome_android.py
index cd8c40fab1feb06..485b96f31e7deaf 100644
--- a/tools/wptrunner/wptrunner/browsers/chrome_android.py
+++ b/tools/wptrunner/wptrunner/browsers/chrome_android.py
@@ -49,7 +49,6 @@ def executor_kwargs(test_type, server_config, cache_manager, run_info_data,
                                              **kwargs)
     # Remove unsupported options on mobile.
     del executor_kwargs["capabilities"]["goog:chromeOptions"]["prefs"]
-    del executor_kwargs["capabilities"]["goog:chromeOptions"]["useAutomationExtension"]
 
     assert kwargs["package_name"], "missing --package-name"
     executor_kwargs["capabilities"]["goog:chromeOptions"]["androidPackage"] = \