diff --git a/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationinformation/repository/InvitationInformationRepositoryTest.kt b/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationinformation/repository/InvitationInformationRepositoryTest.kt
index d656b8f..3f4112b 100644
--- a/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationinformation/repository/InvitationInformationRepositoryTest.kt
+++ b/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationinformation/repository/InvitationInformationRepositoryTest.kt
@@ -1,6 +1,7 @@
 package site.yourevents.invitationinformation.repository
 
 import io.kotest.core.spec.style.DescribeSpec
+import io.kotest.matchers.nulls.shouldNotBeNull
 import io.kotest.matchers.shouldBe
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.jdbc.EmbeddedDatabaseConnection
@@ -21,7 +22,7 @@ import java.time.LocalDateTime
 class InvitationInformationRepositoryTest(
     @Autowired private val invitationInformationJPARepository: InvitationInformationJPARepository,
     @Autowired private val invitationJPARepository: InvitationJPARepository,
-    @Autowired private val memberJPARepository: MemberJPARepository
+    @Autowired private val memberJPARepository: MemberJPARepository,
 ) : DescribeSpec({
 
     val invitationInformationRepository = InvitationInformationRepository(invitationInformationJPARepository)
@@ -51,7 +52,7 @@ class InvitationInformationRepositoryTest(
         invitationInformationVO = InvitationInformationVO(
             invitation = invitationEntity.toDomain(),
             title = "title",
-            schedule = LocalDateTime.now(),
+            schedule = LocalDateTime.of(2025, 3, 14, 12, 0, 0),
             location = "location",
             remark = "remark"
         )
@@ -64,20 +65,50 @@ class InvitationInformationRepositoryTest(
     }
 
     describe("InvitationInformationRepository") {
-        it("save() 메서드를 통해 InvitationInformation을 저장하고 반환해야 한다") {
-            val savedInfo = invitationInformationRepository.save(invitationInformationVO)
+        context("findByInvitation() 메서드에서") {
+            it("저장된 InvitationInformation을 조회해야 한다") {
+                val savedInfo = invitationInformationRepository.save(invitationInformationVO)
+                val foundInfo = invitationInformationRepository.findByInvitation(savedInfo.invitation)
 
-            savedInfo.title shouldBe invitationInformationVO.title
-            savedInfo.schedule shouldBe invitationInformationVO.schedule
-            savedInfo.location shouldBe invitationInformationVO.location
-            savedInfo.remark shouldBe invitationInformationVO.remark
-            savedInfo.invitation.id shouldBe invitationEntity.id
-            savedInfo.invitation.qrUrl shouldBe invitationEntity.qrUrl
-            savedInfo.invitation.templateKey shouldBe invitationEntity.templateKey
-            savedInfo.invitation.deleted shouldBe invitationEntity.deleted
-            savedInfo.invitation.member.socialId shouldBe memberEntity.toDomain().socialId
-            savedInfo.invitation.member.nickname shouldBe memberEntity.toDomain().nickname
-            savedInfo.invitation.member.email shouldBe memberEntity.toDomain().email
+                foundInfo.shouldNotBeNull()
+
+                foundInfo.title shouldBe invitationInformationVO.title
+                foundInfo.schedule shouldBe invitationInformationVO.schedule
+                foundInfo.location shouldBe invitationInformationVO.location
+                foundInfo.remark shouldBe invitationInformationVO.remark
+                foundInfo.invitation.id shouldBe invitationEntity.id
+            }
+
+            it("InvitationInformation이 없는 경우 null을 반환해야 한다") {
+                val newInvitationEntity = InvitationEntity(
+                    member = memberEntity,
+                    qrUrl = "http://example.org",
+                    templateKey = "newTemplate",
+                    deleted = false
+                )
+                invitationJPARepository.save(newInvitationEntity)
+
+                val foundInfo = invitationInformationRepository.findByInvitation(newInvitationEntity.toDomain())
+                foundInfo shouldBe null
+            }
+        }
+
+        context("save() 메서드에서") {
+            it("InvitationInformation을 저장하고 반환해야 한다") {
+                val savedInfo = invitationInformationRepository.save(invitationInformationVO)
+
+                savedInfo.title shouldBe invitationInformationVO.title
+                savedInfo.schedule shouldBe invitationInformationVO.schedule
+                savedInfo.location shouldBe invitationInformationVO.location
+                savedInfo.remark shouldBe invitationInformationVO.remark
+                savedInfo.invitation.id shouldBe invitationEntity.id
+                savedInfo.invitation.qrUrl shouldBe invitationEntity.qrUrl
+                savedInfo.invitation.templateKey shouldBe invitationEntity.templateKey
+                savedInfo.invitation.deleted shouldBe invitationEntity.deleted
+                savedInfo.invitation.member.socialId shouldBe memberEntity.toDomain().socialId
+                savedInfo.invitation.member.nickname shouldBe memberEntity.toDomain().nickname
+                savedInfo.invitation.member.email shouldBe memberEntity.toDomain().email
+            }
         }
     }
 })
diff --git a/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationthumbnail/repository/InvitationThumbnailRepositoryTest.kt b/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationthumbnail/repository/InvitationThumbnailRepositoryTest.kt
index 1000f9b..03472d7 100644
--- a/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationthumbnail/repository/InvitationThumbnailRepositoryTest.kt
+++ b/module-infrastructure/persistence-db/src/test/kotlin/site/yourevents/invitationthumbnail/repository/InvitationThumbnailRepositoryTest.kt
@@ -1,6 +1,7 @@
 package site.yourevents.invitationthumbnail.repository
 
 import io.kotest.core.spec.style.DescribeSpec
+import io.kotest.matchers.nulls.shouldNotBeNull
 import io.kotest.matchers.shouldBe
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.jdbc.EmbeddedDatabaseConnection
@@ -22,7 +23,7 @@ import site.yourevents.member.repository.MemberJPARepository
 class InvitationThumbnailRepositoryTest(
     @Autowired private val invitationThumbnailJPARepository: InvitationThumbnailJPARepository,
     @Autowired private val invitationJPARepository: InvitationJPARepository,
-    @Autowired private val memberJPARepository: MemberJPARepository
+    @Autowired private val memberJPARepository: MemberJPARepository,
 ) : DescribeSpec({
 
     val invitationThumbnailRepository = InvitationThumbnailRepository(invitationThumbnailJPARepository)
@@ -62,15 +63,41 @@ class InvitationThumbnailRepositoryTest(
     }
 
     describe("InvitationThumbnailRepository") {
-        it("save() 메서드를 통해 InvitationThumbnail을 저장하고 반환해야 한다") {
-            val savedThumbnail = invitationThumbnailRepository.save(invitationThumbnailVO)
+        context("findByInvitation() 메서드에서") {
+            it("저장된 InvitationThumbnail을 조회해야 한다") {
+                val savedThumbnail = invitationThumbnailRepository.save(invitationThumbnailVO)
+                val foundThumbnail = invitationThumbnailRepository.findByInvitation(savedThumbnail.invitation)
+                foundThumbnail.shouldNotBeNull()
 
-            savedThumbnail.url shouldBe invitationThumbnailVO.url
-            savedThumbnail.invitation.id shouldBe invitationThumbnailVO.invitation.id
-            savedThumbnail.invitation.member.socialId shouldBe memberEntity.toDomain().socialId
-            savedThumbnail.invitation.member.email shouldBe memberEntity.toDomain().email
-            savedThumbnail.invitation.member.nickname shouldBe memberEntity.toDomain().nickname
+                foundThumbnail.url shouldBe invitationThumbnailVO.url
+                foundThumbnail.invitation.id shouldBe invitationThumbnailVO.invitation.id
+            }
 
+            it("InvitationThumbnail이 없는 경우 null을 반환해야 한다") {
+                val newInvitationEntity = InvitationEntity(
+                    member = memberEntity,
+                    qrUrl = "http://example.org",
+                    templateKey = "newTemplate",
+                    deleted = false
+                )
+                invitationJPARepository.save(newInvitationEntity)
+
+                val foundThumbnail = invitationThumbnailRepository.findByInvitation(newInvitationEntity.toDomain())
+                foundThumbnail shouldBe null
+            }
+        }
+
+        context("save() 메서드에서") {
+            it("InvitationThumbnail을 저장하고 반환해야 한다") {
+                val savedThumbnail = invitationThumbnailRepository.save(invitationThumbnailVO)
+
+                savedThumbnail.url shouldBe invitationThumbnailVO.url
+                savedThumbnail.invitation.id shouldBe invitationThumbnailVO.invitation.id
+                savedThumbnail.invitation.member.socialId shouldBe memberEntity.toDomain().socialId
+                savedThumbnail.invitation.member.email shouldBe memberEntity.toDomain().email
+                savedThumbnail.invitation.member.nickname shouldBe memberEntity.toDomain().nickname
+
+            }
         }
     }
 })