I had the same Error, because of JUNIT version, I had 3 3.8.1 and I have changed to 4.8.1.
so the solution is
you have to go to POM, and make sure that you dependency looks like this
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>