diff --git a/packages/backend/src/core/ReversiService.ts b/packages/backend/src/core/ReversiService.ts
index 8c0a8f6cc7..e31d9e5b1a 100644
--- a/packages/backend/src/core/ReversiService.ts
+++ b/packages/backend/src/core/ReversiService.ts
@@ -587,6 +587,7 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 					lastActiveDate: parsed.user1.lastActiveDate != null ? new Date(parsed.user1.lastActiveDate) : null,
 					lastFetchedAt: parsed.user1.lastFetchedAt != null ? new Date(parsed.user1.lastFetchedAt) : null,
 					movedAt: parsed.user1.movedAt != null ? new Date(parsed.user1.movedAt) : null,
+					instance: null,
 				} : null,
 				user2: parsed.user2 != null ? {
 					...parsed.user2,
@@ -597,6 +598,7 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 					lastActiveDate: parsed.user2.lastActiveDate != null ? new Date(parsed.user2.lastActiveDate) : null,
 					lastFetchedAt: parsed.user2.lastFetchedAt != null ? new Date(parsed.user2.lastFetchedAt) : null,
 					movedAt: parsed.user2.movedAt != null ? new Date(parsed.user2.movedAt) : null,
+					instance: null,
 				} : null,
 			};
 		} else {
diff --git a/packages/backend/src/core/WebhookTestService.ts b/packages/backend/src/core/WebhookTestService.ts
index 2f8cfea7f7..afd011c410 100644
--- a/packages/backend/src/core/WebhookTestService.ts
+++ b/packages/backend/src/core/WebhookTestService.ts
@@ -63,6 +63,7 @@ function generateDummyUser(override?: Partial<MiUser>): MiUser {
 		emojis: [],
 		score: 0,
 		host: null,
+		instance: null,
 		inbox: null,
 		sharedInbox: null,
 		featured: null,
@@ -114,10 +115,13 @@ function generateDummyNote(override?: Partial<MiNote>): MiNote {
 		channelId: null,
 		channel: null,
 		userHost: null,
+		userInstance: null,
 		replyUserId: null,
 		replyUserHost: null,
+		replyUserInstance: null,
 		renoteUserId: null,
 		renoteUserHost: null,
+		renoteUserInstance: null,
 		updatedAt: null,
 		processErrors: [],
 		...override,
@@ -449,6 +453,7 @@ export class WebhookTestService {
 			isAdmin: false,
 			isModerator: false,
 			isSystem: false,
+			instance: undefined,
 			...override,
 		};
 	}
diff --git a/packages/backend/test/unit/NoteCreateService.ts b/packages/backend/test/unit/NoteCreateService.ts
index f4ecfef34d..63e3795a84 100644
--- a/packages/backend/test/unit/NoteCreateService.ts
+++ b/packages/backend/test/unit/NoteCreateService.ts
@@ -57,10 +57,13 @@ describe('NoteCreateService', () => {
 			channelId: null,
 			channel: null,
 			userHost: null,
+			userInstance: null,
 			replyUserId: null,
 			replyUserHost: null,
+			replyUserInstance: null,
 			renoteUserId: null,
 			renoteUserHost: null,
+			renoteUserInstance: null,
 			processErrors: [],
 		};
 
diff --git a/packages/backend/test/unit/misc/is-renote.ts b/packages/backend/test/unit/misc/is-renote.ts
index 24cd2236bb..b6cfa53466 100644
--- a/packages/backend/test/unit/misc/is-renote.ts
+++ b/packages/backend/test/unit/misc/is-renote.ts
@@ -40,10 +40,13 @@ const base: MiNote = {
 	channelId: null,
 	channel: null,
 	userHost: null,
+	userInstance: null,
 	replyUserId: null,
 	replyUserHost: null,
+	replyUserInstance: null,
 	renoteUserId: null,
 	renoteUserHost: null,
+	renoteUserInstance: null,
 	processErrors: [],
 };