---
tags:
- Android
- Android Studio
---

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# Disable 'testOnly' mode for Android Studio 3.0
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Android Studio 3.0 sets `android:testOnly="true"` automatically on APKs that are ran from the IDE.

However, **for some devices (such as OPPO R11), the test-only APKs can never be installed ...**

If you face the same problem, try add this line to your '/gradle.properties':

    # gradle.properties
    android.injected.testOnly=false
    
Then the boring `android:testOnly` attribute disappears. ( ͡° ͜ʖ ͡°)✧

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*BTW, if you do not have an 'OPPO R11' (congratulations), and just want to install such a test-only app with `adb`, try:*

    adb install -t <test_only_apk_filename>.apk
    
*Otherwise, you will get a failure message:*

    Failed to install app-debug.apk: Failure [INSTALL_FAILED_TEST_ONLY: installPackageLI]