diff --git a/backend/src/main/java/codezap/member/repository/MemberJpaRepository.java b/backend/src/main/java/codezap/member/repository/MemberJpaRepository.java
index 033aa3c36..427cdf52f 100644
--- a/backend/src/main/java/codezap/member/repository/MemberJpaRepository.java
+++ b/backend/src/main/java/codezap/member/repository/MemberJpaRepository.java
@@ -4,6 +4,7 @@
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.http.HttpStatus;
 
 import codezap.global.exception.CodeZapException;
@@ -28,7 +29,7 @@ default Member fetchByTemplateId(Long templateId) {
     }
 
     @Query("SELECT t.member FROM Template t WHERE t.id = :templateId")
-    Optional<Member> findByTemplateId(Long templateId);
+    Optional<Member> findByTemplateId(@Param("templateId") Long templateId);
 
     Optional<Member> findByName(String name);
 
diff --git a/backend/src/test/java/codezap/member/repository/MemberJpaRepositoryTest.java b/backend/src/test/java/codezap/member/repository/MemberJpaRepositoryTest.java
index 3fb1d327b..085992e78 100644
--- a/backend/src/test/java/codezap/member/repository/MemberJpaRepositoryTest.java
+++ b/backend/src/test/java/codezap/member/repository/MemberJpaRepositoryTest.java
@@ -1,45 +1,128 @@
 package codezap.member.repository;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.jpa.repository.JpaRepository;
 
 import codezap.category.domain.Category;
-import codezap.category.repository.CategoryJpaRepository;
+import codezap.category.repository.CategoryRepository;
 import codezap.fixture.CategoryFixture;
+import codezap.fixture.MemberFixture;
+import codezap.global.exception.CodeZapException;
 import codezap.global.repository.JpaRepositoryTest;
 import codezap.member.domain.Member;
-import codezap.member.fixture.MemberFixture;
 import codezap.template.domain.Template;
-import codezap.template.repository.TemplateJpaRepository;
+import codezap.template.repository.TemplateRepository;
 
 @JpaRepositoryTest
 class MemberJpaRepositoryTest {
 
-    private final MemberJpaRepository memberJpaRepository;
-    private final TemplateJpaRepository templateJpaRepository;
-    private final CategoryJpaRepository categoryJpaRepository;
+    @Autowired
+    private MemberRepository memberRepository;
+
+    @Autowired
+    private TemplateRepository templateRepository;
 
     @Autowired
-    MemberJpaRepositoryTest(MemberJpaRepository memberJpaRepository, TemplateJpaRepository templateJpaRepository,
-            CategoryJpaRepository categoryJpaRepository
-    ) {
-        this.memberJpaRepository = memberJpaRepository;
-        this.templateJpaRepository = templateJpaRepository;
-        this.categoryJpaRepository = categoryJpaRepository;
+    private CategoryRepository categoryRepository;
+
+    @Nested
+    @DisplayName("id로 Member 조회")
+    class fetchById {
+        @Test
+        @DisplayName("성공 : id로 Member 조회 가능")
+        void fetchByIdSuccess() {
+            Member member = memberRepository.save(MemberFixture.getFirstMember());
+
+            Member actual = memberRepository.fetchById(member.getId());
+
+            assertThat(actual).isEqualTo(member);
+        }
+
+        @Test
+        @DisplayName("실패 : 존재하지 않는 id인 경우 예외 발생")
+        void fetchByIdFailByNotExistsId() {
+            long notExistId = 100;
+
+            assertThatThrownBy(() -> memberRepository.fetchById(notExistId))
+                    .isInstanceOf(CodeZapException.class)
+                    .hasMessage("식별자 " + notExistId + "에 해당하는 멤버가 존재하지 않습니다.");
+        }
     }
 
-    @Test
-    void fetchByTemplateId() {
-        // Then
-        Member member = ((JpaRepository<Member, Long>)memberJpaRepository).save(MemberFixture.memberFixture());
-        Category category = ((JpaRepository<Category, Long>)categoryJpaRepository).save(CategoryFixture.getFirstCategory());
-        Template template = new Template(member, "title", "description", category);
-        Template savedTemplate = ((JpaRepository<Template, Long>)templateJpaRepository).save(template);
+    @Nested
+    @DisplayName("닉네임(아이디)로 Member 조회")
+    class fetchByName {
+        @Test
+        @DisplayName("성공 : 닉네임으로 Member 조회 가능")
+        void fetchByNameSuccess() {
+            Member member = memberRepository.save(MemberFixture.getFirstMember());
+
+            Member actual = memberRepository.fetchByName(member.getName());
+
+            assertThat(actual).isEqualTo(member);
+        }
+
+        @Test
+        @DisplayName("실패 : 존재하지 않는 닉네임인 경우 예외 발생")
+        void fetchByNameFailByNotExistsId() {
+            String notExistName = "켬미";
+
+            assertThatThrownBy(() -> memberRepository.fetchByName(notExistName))
+                    .isInstanceOf(CodeZapException.class)
+                    .hasMessage("존재하지 않는 아이디 " + notExistName + " 입니다.");
+        }
+    }
+
+    @Nested
+    @DisplayName("템플릿 id로 Member 조회")
+    class fetchByTemplateId {
+        @Test
+        @DisplayName("성공 : 템플릿 id로 Member 조회 가능")
+        void fetchByTemplateIdSuccess() {
+            Member member = memberRepository.save(MemberFixture.getFirstMember());
+            Category category = categoryRepository.save(CategoryFixture.getFirstCategory());
+            Template template = templateRepository.save(new Template(member, "title", "description", category));
+
+            Member actual = memberRepository.fetchByTemplateId(template.getId());
+
+            assertThat(actual).isEqualTo(member);
+        }
+
+        @Test
+        @DisplayName("실패 : 존재하지 않는 템플릿 id인 경우 예외 발생")
+        void fetchByTemplateIdFailByNotExistsId() {
+            long notExistId = 100;
+
+            assertThatThrownBy(() -> memberRepository.fetchByTemplateId(notExistId))
+                    .isInstanceOf(CodeZapException.class)
+                    .hasMessage("템플릿에 대한 멤버가 존재하지 않습니다.");
+        }
+    }
+
+    @Nested
+    @DisplayName("닉네임(아이디) 존재 여부")
+    class existsByName {
+        @Test
+        @DisplayName("성공 : 해당 닉네임이 존재하면 true를 반환")
+        void existsByNameReturnTrue() {
+            Member member = memberRepository.save(MemberFixture.getFirstMember());
+
+            boolean actual = memberRepository.existsByName(member.getName());
+
+            assertThat(actual).isTrue();
+        }
+
+        @Test
+        @DisplayName("성공 : 해당 닉네임이 존재하지 않으면 false를 반환")
+        void existsByNameReturnFalse() {
+            boolean actual = memberRepository.existsByName("notExist");
 
-        assertThat(memberJpaRepository.fetchByTemplateId(savedTemplate.getId())).isEqualTo(member);
+            assertThat(actual).isFalse();
+        }
     }
 }