diff --git a/zzansuni-api-server/app/src/test/java/org/haedal/zzansuni/challengegroup/domain/ChallengeGroupTest.java b/zzansuni-api-server/app/src/test/java/org/haedal/zzansuni/challengegroup/domain/ChallengeGroupTest.java
new file mode 100644
index 0000000..a05dbe4
--- /dev/null
+++ b/zzansuni-api-server/app/src/test/java/org/haedal/zzansuni/challengegroup/domain/ChallengeGroupTest.java
@@ -0,0 +1,90 @@
+package org.haedal.zzansuni.challengegroup.domain;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ChallengeGroupTest {
+
+    @Test
+    @DisplayName("챌린지 그룹 업데이트가 정상적으로 동작한다.")
+    void update() {
+        // given
+        // 챌린지 그룹1, 챌린지1,2,3 생성
+        List<Challenge> challenges = new ArrayList<>();
+        ChallengeGroup challengeGroup = ChallengeGroup.builder()
+            .id(1L)
+            .challenges(challenges)
+            .build();
+
+        Challenge challenge1 = Challenge.builder()
+            .id(1L)
+            .challengeGroup(challengeGroup)
+            .build();
+
+        Challenge challenge2 = Challenge.builder()
+            .id(2L)
+            .challengeGroup(challengeGroup)
+            .build();
+        Challenge challenge3 = Challenge.builder()
+            .id(3L)
+            .challengeGroup(challengeGroup)
+            .build();
+
+        challenges.add(challenge1);
+        challenges.add(challenge2);
+        challenges.add(challenge3);
+
+
+        // 챌린지 update 1,2,3 생성
+        ChallengeGroupCommand.UpdateChallenge updateChallenge1 = ChallengeGroupCommand.UpdateChallenge.builder()
+            .id(1L)
+            .requiredCount(1)
+            .onceExp(1)
+            .successExp(1)
+            .difficulty(1)
+            .activePeriod(1)
+            .build();
+
+        ChallengeGroupCommand.UpdateChallenge updateChallenge2 = ChallengeGroupCommand.UpdateChallenge.builder()
+            .id(2L)
+            .requiredCount(2)
+            .onceExp(2)
+            .successExp(2)
+            .difficulty(2)
+            .activePeriod(2)
+            .build();
+
+        ChallengeGroupCommand.UpdateChallenge updateChallenge3 = ChallengeGroupCommand.UpdateChallenge.builder()
+            .id(3L)
+            .requiredCount(3)
+            .onceExp(3)
+            .successExp(3)
+            .difficulty(3)
+            .activePeriod(3)
+            .build();
+
+        ChallengeGroupCommand.Update command = ChallengeGroupCommand.Update.builder()
+            .id(1L)
+            .title("title")
+            .content("content")
+            .guide("guide")
+            .joinStartDate(LocalDate.now())
+            .joinEndDate(LocalDate.now().plusDays(1))
+            .category(ChallengeCategory.ETC)
+            .createChallenges(List.of())
+            .updateChallenges(List.of(updateChallenge1, updateChallenge2, updateChallenge3))
+            .build();
+
+        // when
+        challengeGroup.update(command);
+
+        // then
+        assertEquals(3, challengeGroup.getChallenges().size());
+    }
+}
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