使用ANDROIDX_TEST_ORCHESTRATOR时未找到测试

当我ANDROIDX_TEST_ORCHESTRATOR进来testOptions

testOptions {
    unitTests.includeAndroidResources = true
    animationsDisabled = true
    execution 'ANDROIDX_TEST_ORCHESTRATOR'
}

然后我运行仪器化测试

./gradlew connectedStudioDebugAndroidTest --stacktrace

我收到未找到测试的错误

com.android.builder.testing.ConnectedDevice > No tests found.[emu1(AVD) - 9] FAILED 
No tests found. This usually means that your test classes are not in the form that your test runner expects (e.g. don't inherit from TestCase or lack @Test annotations).

当我注释掉ANDROIDX_TEST_ORCHESTRATOR在testOptions

testOptions {
    unitTests.includeAndroidResources = true
    animationsDisabled = true
    // execution 'ANDROIDX_TEST_ORCHESTRATOR'
}

测试运行。

那么我如何才能运行测试ANDROIDX_TEST_ORCHESTRATOR呢？

编辑

我取得了一些进展：androidTests在我的真实设备（API 28）上运行，但没有任何模拟器（API 28）。我在OSX上。