--- a/testing/marionette/client/marionette_driver/geckoinstance.py
+++ b/testing/marionette/client/marionette_driver/geckoinstance.py
@@ -148,17 +148,19 @@ class GeckoInstance(object):
         else:
             process_args['logfile'] = self.gecko_log
 
         env = os.environ.copy()
 
         # environment variables needed for crashreporting
         # https://developer.mozilla.org/docs/Environment_variables_affecting_crash_reporting
         env.update({'MOZ_CRASHREPORTER': '1',
-                    'MOZ_CRASHREPORTER_NO_REPORT': '1'})
+                    'MOZ_CRASHREPORTER_NO_REPORT': '1',
+                    'MOZ_CRASHREPORTER_SHUTDOWN': '1',
+                    })
 
         return {
             'binary': self.binary,
             'profile': self.profile,
             'cmdargs': ['-no-remote', '-marionette'] + self.app_args,
             'env': env,
             'symbols_path': self.symbols_path,
             'process_args': process_args