# INSTALL_FAILED_TEST_ONLY: installPackageLI

**Code:** `INSTALL_FAILED_TEST_ONLY` · **Category:** Android · **Seen on:** Android

The APK is marked testOnly (built by Android Studio’s Run button), so normal installs refuse it.

## Meaning

APKs from Run → app include android:testOnly="true" and can only be installed with adb install -t. Share builds made with Build → Build APK(s) or assembleDebug instead.

## Common causes

- Sharing an APK built via the Run button
- Build config adding testOnly

## Quick fix

1. Install with adb install -t (testing only)
2. Build a shareable APK with ./gradlew assembleDebug or assembleRelease

## Detailed fix by platform

### ADB

1. 

```kotlin
adb install -t app-debug.apk
./gradlew assembleDebug   # produces a normal debug APK
```


## How to diagnose

1. **Source** — How was the APK built?
2. **Manifest** — android:testOnly present?

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Source: [WhatIsMyError](https://whatismyerror.com/errors/android/install-failed-test-only)