当毕业生的同步完成时,我收到此错误

testCompile 'junit:junit:4.12'

在app / build.gradle上显示消息

Error:(23,17) Failed to resolve: junit:junit:4.12
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// build gradle(app module)

apply plugin: 'com.android.application'

android {
compileSdkVersion 23
buildToolsVersion "23.0.1"

defaultConfig {
    applicationId "com.example.abhishek.vearch"
    minSdkVersion 16
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
    }
}
}

dependencies {
compile fileTree(dir: 'libs',include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.android.support:design:23.0.1'
}

//建立毕业生(项目)

//顶级构建文件,您可以在其中添加所有子项目/模块通用的配置选项.

buildscript {
repositories {
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:1.3.0'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}
}

allprojects {
repositories {
    jcenter()
}
}

task clean(type: Delete) {
delete rootProject.buildDir
}

>我试过Error:(23,17) Failed to resolve: junit:junit:4.12