Please help...i have this error

Help/Discuss
1

Error:Execution failed for task ‘:app:preDebugAndroidTestBuild’.

Conflict with dependency ‘com.android.support:support-annotations’ in project ‘:app’. Resolved versions for app (26.1.0) and test app (27.1.1) differ. See Uygulamanızı test etme  |  Android Studio  |  Android Developers for details.

2

Well, have you read that link? :upside_down_face:

To resolve this issue, simply make sure that you use the same version of each dependency that is common to both your app and its instrumented tests.