diff --git a/testing/marionette/client/marionette/runner/base.py b/testing/marionette/client/marionette/runner/base.py
index 206811ec13e..b98f4650c31 100644
--- a/testing/marionette/client/marionette/runner/base.py
+++ b/testing/marionette/client/marionette/runner/base.py
@@ -634,12 +634,14 @@ class BaseMarionetteTestRunner(object):
                                              logcat_dir=self.logcat_dir,
                                              gecko_path=self.gecko_path,
                                              symbols_path=self.symbols_path,
-                                             timeout=self.timeout)
+                                             timeout=self.timeout,
+                                             device_serial=self.device_serial)
             else:
                 self.marionette = Marionette(host=host,
                                              port=int(port),
                                              baseurl=self.baseurl,
-                                             timeout=self.timeout)
+                                             timeout=self.timeout,
+                                             device_serial=self.device_serial)
         elif self.emulator:
             self.marionette = Marionette.getMarionetteOrExit(
                                          emulator=self.emulator,
@@ -653,7 +655,8 @@ class BaseMarionetteTestRunner(object):
                                          gecko_path=self.gecko_path,
                                          symbols_path=self.symbols_path,
                                          timeout=self.timeout,
-                                         sdcard=self.sdcard)
+                                         sdcard=self.sdcard,
+                                         device_serial=self.device_serial)
         else:
             raise Exception("must specify binary, address or emulator")
 
diff --git a/testing/marionette/client/marionette/runner/mixins/b2g.py b/testing/marionette/client/marionette/runner/mixins/b2g.py
index 8cbe388d152..9a48cf267e9 100644
--- a/testing/marionette/client/marionette/runner/mixins/b2g.py
+++ b/testing/marionette/client/marionette/runner/mixins/b2g.py
@@ -12,12 +12,11 @@ class B2GTestCaseMixin(object):
     def __init__(self, *args, **kwargs):
         self._device_manager = None
 
-    @property
-    def device_manager(self, *args, **kwargs):
+    def get_device_manager(self, *args, **kwargs):
         if not self._device_manager:
             dm_type = os.environ.get('DM_TRANS', 'adb')
             if dm_type == 'adb':
-                self._device_manager = mozdevice.DeviceManagerADB()
+                self._device_manager = mozdevice.DeviceManagerADB(**kwargs)
             elif dm_type == 'sut':
                 host = os.environ.get('TEST_DEVICE')
                 if not host:
@@ -27,3 +26,6 @@ class B2GTestCaseMixin(object):
                 raise Exception('Unknown device manager type: %s' % dm_type)
         return self._device_manager
 
+    @property
+    def device_manager(self):
+        return self.get_device_manager()