Failed to use ScalaTest

Question

import org.scalatest.FunSuite class MyTestSuite extends FunSuite { } 

The following message appeared in the Intellij IDE:

the MyTestSuite class must either be declared abstract, or implement the abstract member '$ bang $ eq $ eq (right: T): TripleEqualsInvocation' in 'Org.scalactic.TripleEqualsSupport'

However, according to ScalaTest , nothing needs to be implemented. Please advice, thanks

Answer 1

I had the same issue and the invalidation of caches / restarting IntelliJ fixed it.