Travis CI - android build failed. No connected devices error

Próbuje sił z CI a konkretnie z TRAVIS CI w moim projekcie android. Próbowałem już wiele konfiguracji .travis.yml. Problem z tym, że nie znajduje podłączonego urządzenia tymczasem w pliku konfiguracyjnym ustawiłem maszynę.

Error w konsoli Travisa:

:app:connectedDebugAndroidTest FAILED

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':app:connectedDebugAndroidTest'.

> com.android.builder.testing.api.DeviceException: No connected devices!

* Try:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED 

Link do travisa: https://travis-ci.org/hypeapps/Episodie/builds/158706530

Kod pliku .travis.yml

language: android
jdk:
  - oraclejdk8
before_install:
- chmod +x gradlew
env:
  global:
   - ANDROID_API_LEVEL=24
   - EMULATOR_API_LEVEL=21
   - ANDROID_BUILD_TOOLS_VERSION=24.0.1
   - ANDROID_ABI=google_apis/armeabi-v7a
   - ADB_INSTALL_TIMEOUT=20 # minutes (2 minutes by default)
android:
  components:
    - tools
    - tools
    - platform-tools
    - build-tools-$ANDROID_BUILD_TOOLS_VERSION
    - android-$ANDROID_API_LEVEL
    - android-$EMULATOR_API_LEVEL
    - extra
    - add-on
    - extra-google-m2repository
    - extra-android-m2repository

    # Google Play Services
    - extra-google-google_play_services
    # Support library
    - extra-android-support

    - addon-google_apis-google-$ANDROID_API_LEVEL
    - addon-google_apis-google-$EMULATOR_API_LEVEL

    - sys-img-armeabi-v7a-addon-google_apis-google-$ANDROID_API_LEVEL
    - sys-img-armeabi-v7a-addon-google_apis-google-$EMULATOR_API_LEVEL
  licenses:
    - 'android-sdk-preview-license-52d11cd2'
    - 'android-sdk-license-.+'
    - 'google-gdk-license-.+'
  before_script:
     - echo no | android create avd --force -n test -t "Google Inc.:Google APIs:"$EMULATOR_API_LEVEL --abi $ANDROID_ABI
     - emulator -avd test -no-skin -no-audio -no-window &
     - android-wait-for-emulator 

build.gradle: https://github.com/hypeapps/Episodie/blob/master/app/build.gradle

Cały projekt na github: https://github.com/hypeapps/Episodie/