mockito-scala error `value thenAnswer is not a member of Nothing`

[LannyRipple]

Using Mockito I do not receive the error but when using mockito-scala I do. Code below mirrors the code I'm writing.

scalaVersion: 2.12.16 mockito-scala: 1.17.7

package org.ljr

import org.mockito.AdditionalAnswers._
import org.mockito.ArgumentMatchers._
import org.scalatest.matchers.should._
import org.scalatest.wordspec._
import org.mockito.MockitoSugar

class AnswerSpecMockito extends AnyWordSpec with Matchers {
  import Environment._
  import org.mockito.Mockito._

  val mt = mock(classOf[MockTarget])
  when(mt.addTriggers(any[Foo], any[Bar])).thenAnswer(returnsFirstArg())
}

class AnswerSpecMockitoScala extends AnyWordSpec with Matchers with MockitoSugar {
  import Environment._

  val mt = mock[MockTarget]

/* Compiler error

  [error] /Users/lripple/ip/mockito-scala-example/src/main/scala/org/ljr
  /AnswerSpecMockitoScala.scala:23:44: value thenAnswer is not a member of Nothing
  [error]   when(mt.addTriggers(any[Foo], any[Bar])).thenAnswer(returnsFirstArg())
  [error]                                            ^
*/

  when(mt.addTriggers(any[Foo], any[Bar])).thenAnswer(returnsFirstArg())
}


object Environment {

  case class Foo(a: Int, b: String)

  trait Bar {
    def key: String
  }

  case class BarImpl(key: String, value: String) extends Bar

  class MockTarget {
    def addTriggers(foo: Foo, bar: Bar): Foo = foo.copy(b = bar.key)
  }
}

As a workaround I create the mock and set up thenAnswer in a def of an object which does not extends MockitoSugar.