diff --git a/packages/backend/src/core/HttpRequestService.ts b/packages/backend/src/core/HttpRequestService.ts
index 0ad5667049..083153940a 100644
--- a/packages/backend/src/core/HttpRequestService.ts
+++ b/packages/backend/src/core/HttpRequestService.ts
@@ -54,19 +54,19 @@ class HttpRequestServiceAgent extends http.Agent {
 				}
 			});
 		return socket;
-	};
+	}
 
 	@bindThis
 	private isPrivateIp(ip: string): boolean {
 		const parsedIp = ipaddr.parse(ip);
-	
+
 		for (const net of this.config.allowedPrivateNetworks ?? []) {
 			const cidr = ipaddr.parseCIDR(net);
 			if (cidr[0].kind() === parsedIp.kind() && parsedIp.match(ipaddr.parseCIDR(net))) {
 				return false;
 			}
 		}
-	
+
 		return parsedIp.range() !== 'unicast';
 	}
 }
@@ -93,19 +93,19 @@ class HttpsRequestServiceAgent extends https.Agent {
 				}
 			});
 		return socket;
-	};
+	}
 
 	@bindThis
 	private isPrivateIp(ip: string): boolean {
 		const parsedIp = ipaddr.parse(ip);
-	
+
 		for (const net of this.config.allowedPrivateNetworks ?? []) {
 			const cidr = ipaddr.parseCIDR(net);
 			if (cidr[0].kind() === parsedIp.kind() && parsedIp.match(ipaddr.parseCIDR(net))) {
 				return false;
 			}
 		}
-	
+
 		return parsedIp.range() !== 'unicast';
 	}
 }
diff --git a/packages/backend/src/core/activitypub/models/ApPersonService.ts b/packages/backend/src/core/activitypub/models/ApPersonService.ts
index 1c117795e9..2119c41569 100644
--- a/packages/backend/src/core/activitypub/models/ApPersonService.ts
+++ b/packages/backend/src/core/activitypub/models/ApPersonService.ts
@@ -163,13 +163,16 @@ export class ApPersonService implements OnModuleInit {
 		}
 
 		for (const collection of ['outbox', 'followers', 'following'] as (keyof IActor)[]) {
-			const collectionUri = getApId((x as IActor)[collection]);
-			if (typeof collectionUri === 'string' && collectionUri.length > 0) {
-				if (this.utilityService.punyHost(collectionUri) !== expectHost) {
-					throw new Error(`invalid Actor: ${collection} has different host`);
+			const xCollection = (x as IActor)[collection];
+			if (xCollection != null) {
+				const collectionUri = getApId(xCollection);
+				if (typeof collectionUri === 'string' && collectionUri.length > 0) {
+					if (this.utilityService.punyHost(collectionUri) !== expectHost) {
+						throw new Error(`invalid Actor: ${collection} has different host`);
+					}
+				} else if (collectionUri != null) {
+					throw new Error(`invalid Actor: wrong ${collection}`);
 				}
-			} else if (collectionUri != null) {
-				throw new Error(`invalid Actor: wrong ${collection}`);
 			}
 		}
 
diff --git a/packages/backend/src/queue/processors/InboxProcessorService.ts b/packages/backend/src/queue/processors/InboxProcessorService.ts
index f453d7d1ae..102e835e24 100644
--- a/packages/backend/src/queue/processors/InboxProcessorService.ts
+++ b/packages/backend/src/queue/processors/InboxProcessorService.ts
@@ -192,8 +192,7 @@ export class InboxProcessorService implements OnApplicationShutdown {
 			if (signerHost !== activityIdHost) {
 				throw new Bull.UnrecoverableError(`skip: signerHost(${signerHost}) !== activity.id host(${activityIdHost}`);
 			}
-		}
-		else {
+		} else {
 			throw new Bull.UnrecoverableError('skip: activity id is not a string');
 		}
 
diff --git a/packages/backend/test/unit/activitypub.ts b/packages/backend/test/unit/activitypub.ts
index 53ced3dab3..73d6186edf 100644
--- a/packages/backend/test/unit/activitypub.ts
+++ b/packages/backend/test/unit/activitypub.ts
@@ -176,7 +176,7 @@ describe('ActivityPub', () => {
 			resolver.register(actor.id, actor);
 			resolver.register(post.id, post);
 
-			const note = await noteService.createNote(post.id, resolver, true);
+			const note = await noteService.createNote(post.id, undefined, resolver, true);
 
 			assert.deepStrictEqual(note?.uri, post.id);
 			assert.deepStrictEqual(note.visibility, 'public');
@@ -336,7 +336,7 @@ describe('ActivityPub', () => {
 			resolver.register(actor.featured, featured);
 			resolver.register(firstNote.id, firstNote);
 
-			const note = await noteService.createNote(firstNote.id as string, resolver);
+			const note = await noteService.createNote(firstNote.id as string, undefined, resolver);
 			assert.strictEqual(note?.uri, firstNote.id);
 		});
 	});