:app:connectedAndroidTestDebug
02:11:13 E/Device: Error during shell execution: null
Unable to install /home/travis/build/.../app/build/outputs/apk/app-debug.apk
com.android.ddmlib.InstallException
	at com.android.ddmlib.Device.installPackages(Device.java:934)
	at com.android.builder.testing.ConnectedDevice.installPackages(ConnectedDevice.java:113)
	at com.android.builder.internal.testing.SimpleTestCallable.call(SimpleTestCallable.java:130)
	at com.android.builder.internal.testing.SimpleTestCallable.call(SimpleTestCallable.java:49)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.android.ddmlib.ShellCommandUnresponsiveException
	at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:513)
	at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:390)
	at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:359)
	at com.android.ddmlib.Device.executeShellCommand(Device.java:568)
	at com.android.ddmlib.Device.createMultiInstallSession(Device.java:1000)
	at com.android.ddmlib.Device.installPackages(Device.java:891)
	... 9 more
com.android.builder.testing.ConnectedDevice > runTests[test(AVD) - 5.0.2] FAILED
	com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException
		at com.android.builder.testing.ConnectedDevice.installPackages(ConnectedDevice.java:117)
null
com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException
	at com.android.builder.testing.ConnectedDevice.installPackages(ConnectedDevice.java:117)
	at com.android.builder.internal.testing.SimpleTestCallable.call(SimpleTestCallable.java:130)
	at com.android.builder.internal.testing.SimpleTestCallable.call(SimpleTestCallable.java:49)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.android.ddmlib.InstallException
	at com.android.ddmlib.Device.installPackages(Device.java:934)
	at com.android.builder.testing.ConnectedDevice.installPackages(ConnectedDevice.java:113)
	... 8 more
Caused by: com.android.ddmlib.ShellCommandUnresponsiveException
	at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:513)
	at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:390)
	at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:359)
	at com.android.ddmlib.Device.executeShellCommand(Device.java:568)
	at com.android.ddmlib.Device.createMultiInstallSession(Device.java:1000)
	at com.android.ddmlib.Device.installPackages(Device.java:891)
	... 9 more
:app:connectedAndroidTestDebug FAILED
FAILURE: Build failed with an exception.