diff --git a/tools_webrtc/mb/mb.py b/tools_webrtc/mb/mb.py
index dcf6a57894..d2bba88e68 100755
--- a/tools_webrtc/mb/mb.py
+++ b/tools_webrtc/mb/mb.py
@@ -1055,9 +1055,6 @@ class MetaBuildWrapper(object):
                  '--logdog-bin-cmd', '../../bin/logdog_butler',
                  '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
                  '--store-tombstones']
-
-      if test_type != 'junit_test':
-        cmdline += ['--target-devices-file', '${SWARMING_BOT_FILE}']
     elif test_type == "script":
       cmdline = ['../../' + self.ToSrcRelPath(isolate_map[target]['script'])]
     else:
diff --git a/tools_webrtc/mb/mb_unittest.py b/tools_webrtc/mb/mb_unittest.py
index e24a01b874..dd475317ba 100755
--- a/tools_webrtc/mb/mb_unittest.py
+++ b/tools_webrtc/mb/mb_unittest.py
@@ -383,7 +383,6 @@ class UnitTest(unittest.TestCase):
         '--logdog-bin-cmd', '../../bin/logdog_butler',
         '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
         '--store-tombstones',
-        '--target-devices-file', '${SWARMING_BOT_FILE}',
     ])
 
   def test_gn_gen_swarming_android_junit_test(self):