EaseUI库的的Gradle中的instrumentTest在升级了Gradle3.1.0后，无法识别

EaseUI库的的Gradle中的instrumentTest在升级了Gradle3.1.0后，无法识别，会提示“The SourceSet 'instrumentTest' is not recognized by the Android Gradle Plugin. Perhaps you misspelled something?
翻译：“SourceSet的“instrumentTest”不被Android Gradle插件识别。也许你拼错吗?”
请问有遇到过的吗，如何解决