--- a/testing/web-platform/tests/tools/wptrunner/wptrunner/executors/executormarionette.py
+++ b/testing/web-platform/tests/tools/wptrunner/wptrunner/executors/executormarionette.py
@@ -24,27 +24,20 @@ from .base import (ExecutorException,
                    testharness_result_converter,
                    reftest_result_converter,
                    strip_server)
 
 from ..testrunner import Stop
 from ..webdriver_server import GeckoDriverServer
 
 
-
 def do_delayed_imports():
     global errors, marionette
 
-    # Marionette client used to be called marionette, recently it changed
-    # to marionette_driver for unfathomable reasons
-    try:
-        import marionette
-        from marionette import errors
-    except ImportError:
-        from marionette_driver import marionette, errors
+    from marionette_driver import marionette, errors
 
 
 class MarionetteProtocol(Protocol):
     def __init__(self, executor, browser, timeout_multiplier=1):
         do_delayed_imports()
 
         Protocol.__init__(self, executor, browser)
         self.marionette = None