Stacktrace for mockwebserver running in instrumentation test

gistfile1.txt

java.net.SocketException: socket failed: EACCES (Permission denied)
at libcore.io.IoBridge.socket(IoBridge.java:583)
at java.net.PlainSocketImpl.create(PlainSocketImpl.java:201)
at java.net.PlainServerSocketImpl.create(PlainServerSocketImpl.java:38)
at java.net.ServerSocket.<init>(ServerSocket.java:98)
at java.net.ServerSocket.<init>(ServerSocket.java:69)
at com.squareup.okhttp.mockwebserver.MockWebServer.play(MockWebServer.java:245)
at com.squareup.okhttp.mockwebserver.MockWebServer.play(MockWebServer.java:232)
at com.foo.bar.android.test.HelloAndroidActivityTest.testActivity(HelloAndroidActivityTest.java:17)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199)
at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:190)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:175)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1584)
Caused by: libcore.io.ErrnoException: socket failed: EACCES (Permission denied)
at libcore.io.Posix.socket(Native Method)
at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:181)
at libcore.io.IoBridge.socket(IoBridge.java:568)
... 21 more