diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozdevice/tests/droidsut_launch.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozdevice/tests/droidsut_launch.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,35 @@
+from sut import MockAgent
+import mozdevice
+import mozlog
+import unittest
+
+class LaunchTest(unittest.TestCase):
+
+    def test_nouserserial(self):
+        a = MockAgent(self, commands = [("ps",
+                                         "10029	549	com.android.launcher\n"
+                                         "10066	1198	com.twitter.android"),
+                                        ("info sutuserinfo", ""),
+                                        ("exec am start -W -n "
+                                         "org.mozilla.fennec/.App -a "
+                                         "android.intent.action.VIEW",
+                                         "OK\nreturn code [0]")])
+        d = mozdevice.DroidSUT("127.0.0.1", port=a.port, logLevel=mozlog.DEBUG)
+        d.launchFennec("org.mozilla.fennec")
+        a.wait()
+
+    def test_userserial(self):
+        a = MockAgent(self, commands = [("ps",
+                                         "10029	549	com.android.launcher\n"
+                                         "10066	1198	com.twitter.android"),
+                                        ("info sutuserinfo", "User Serial:0"),
+                                        ("exec am start --user 0 -W -n "
+                                         "org.mozilla.fennec/.App -a "
+                                         "android.intent.action.VIEW",
+                                         "OK\nreturn code [0]")])
+        d = mozdevice.DroidSUT("127.0.0.1", port=a.port, logLevel=mozlog.DEBUG)
+        d.launchFennec("org.mozilla.fennec")
+        a.wait()
+
+if __name__ == '__main__':
+    unittest.main()