왜 오류가 안날까요?

영상 11:00부분 부터, 테스트가 끝날 때마다 초기화되는 AfterEach부분을 적지 않았음에도 불구하고 정상실행 됩니다. findByName()이 왜 오류가 안날까요?

스프링이 업그레이드 되면서 자동으로 clear하는 기능이 생겼나 싶어서 찾아보니까 그런내용은 없었는데, 혹시 오류가 안나는 이유를 알 수 있을까요?

package hello.hellospring.repository;
import hello.hellospring.domain.Member;
import org.junit.jupiter.api.Test;
import java.util.List;
import static org.assertj.core.api.Assertions.*;
class MemoryMemberRepositoryTest {
    MemoryMemberRepository repository = new MemoryMemberRepository();

    @Test
    public void save() {
        //given
        Member member = new Member();
        member.setName("spring");
        //when
        repository.save(member);
        //then
        Member result = repository.findById(member.getId()).get();
        assertThat(result).isEqualTo(member);
    }
    @Test
    public void findByName() {
        //given
        Member member1 = new Member();
        member1.setName("spring1");
        repository.save(member1);
        Member member2 = new Member();
        member2.setName("spring2");
        repository.save(member2);
        //when
        Member result = repository.findByName("spring1").get();
        assertThat(result).isEqualTo(member1);
    }
    @Test
    public void findAll() {
        //given
        Member member1 = new Member();
        member1.setName("spring1");
        repository.save(member1);
        Member member2 = new Member();
        member2.setName("spring2");
        repository.save(member2);
        //when
        List<Member> result = repository.findAll();
        //then
        assertThat(result.size()).isEqualTo(2);
    }
}