jUnit not found in androidTest folder but found in test folder

Issue

I am writing instrumented tests in android but when I import jUnit (to use @RunWith annotation), it is not able to find jUnit but I am already using jUnit in unit tests (under test folder). I am not able to even start writing the tests.
Same thing is happening with AndroidJUnit4 class.

I have included this stuff in build.gradle :

testCompile brazilGradle.testbuild('junit')

androidTestCompile brazilGradle.testbuild('AndroidSupportTestPackage-rules')
androidTestCompile brazilGradle.testbuild('AndroidSupportTestPackage-runner')

I have also included this in defaultConfig :

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

How come it is working in one folder and not in another ?

Solution

The silly error on my part was that by Build Variant was set to debug and by changing it to release I was able to use dependencies not available to me earlier.
If anyone cannot find this setting, this can be seen as a Build Varaint tab at the bottom left corner. Clicking on that should open a small panel containing the app module and the corresponding build variant. Clicking on that column should show the dropdown with release and debug and any other flavors if any.

Answered By - iammrmehul