Probleme d'execution des codes avec android studio

Bonjour, j'ai installé android studio et je n'arrive pas a execute un projet que j'ai cree voila l'erreur:

Code:

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Information:Gradle tasks [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:assembleDebug]
Error:A problem occurred configuring project ':app'.
> Could not resolve all dependencies for configuration ':app:_debugUnitTestCompile'.
   > Could not resolve junit:junit:4.12.
     Required by:
         Test:app:unspecified
      > Could not resolve junit:junit:4.12.
         > Could not get resource 'https://jcenter.bintray.com/junit/junit/4.12/junit-4.12.pom'.
            > Could not GET 'https://jcenter.bintray.com/junit/junit/4.12/junit-4.12.pom'.
               > jcenter.bintray.com