중복_회원_예외 fail()에 생기는 빨간줄!

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

import static org.assertj.core.api.Assertions.* ;
import static org.junit.jupiter.api.Assertions.*;
import static org.junit.jupiter.api.Assertions.fail;

class MemberServiceTest {
    MemberService memberService = new MemberService();

    @Test
    void 회원가입() {
        Member member = new Member();
        member.setName("hello");

        Long saveId = memberService.join(member);

        Member findMemeber  = memberService.findOne(saveId).get();
        assertThat(member.getName()).isEqualTo(findMemeber.getName());
    } 
    @Test
    public void 중복_회원_예외(){
        // given
        Member member1 = new Member();
        member1.setName("spring");

        Member member2 = new Member();
        member2.setName("spring");

        memberService.join(member1);
        try {
            memberService.join(member2);
            fail();
        }catch (IllegalStateException e){
            assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
        }

    } 
}

위에는 전체 코드 입니다

fail() 메서드에 빨간줄이 생기고 실행하면 아래와 같은 오류가 발생합니다

어떻게 고쳐야할까요?

(+추가) fail()에 올렸을때 뜨는 메세지 입니다!