diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index e304e56a33..9cec614d5c 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -263,10 +263,8 @@ export class NoteCreateService implements OnApplicationShutdown {
 			}
 		}
 
-		if (!user.host) {
-			if (this.utilityService.isKeyWordIncluded(data.cw ?? data.text ?? '', meta.prohibitedWords)) {
-				throw new NoteCreateService.ContainsProhibitedWordsError();
-			}
+		if (this.utilityService.isKeyWordIncluded(data.cw ?? data.text ?? '', meta.prohibitedWords)) {
+			throw new NoteCreateService.ContainsProhibitedWordsError();
 		}
 
 		const inSilencedInstance = this.utilityService.isSilencedHost(meta.silencedHosts, user.host);
diff --git a/packages/backend/test/e2e/note.ts b/packages/backend/test/e2e/note.ts
index d3e8342477..a5742d6e77 100644
--- a/packages/backend/test/e2e/note.ts
+++ b/packages/backend/test/e2e/note.ts
@@ -663,7 +663,7 @@ describe('Note', () => {
 			assert.strictEqual(note2.body.error.code, 'CONTAINS_PROHIBITED_WORDS');
 		});
 
-		test('禁止ワードを含んでいてもリモートノートはエラーにならない', async () => {
+		test('禁止ワードを含んでるリモートノートもエラーになる', async () => {
 			const prohibited = await api('admin/update-meta', {
 				prohibitedWords: [
 					'test',
@@ -678,7 +678,7 @@ describe('Note', () => {
 				text: 'hogetesthuge',
 			}, tom);
 
-			assert.strictEqual(note1.status, 200);
+			assert.strictEqual(note1.status, 400);
 		});
 	});
 
diff --git a/packages/backend/test/unit/activitypub.ts b/packages/backend/test/unit/activitypub.ts
index 85b82dbfe7..88ff49b119 100644
--- a/packages/backend/test/unit/activitypub.ts
+++ b/packages/backend/test/unit/activitypub.ts
@@ -100,6 +100,7 @@ describe('ActivityPub', () => {
 		perRemoteUserUserTimelineCacheMax: 100,
 		blockedHosts: [] as string[],
 		sensitiveWords: [] as string[],
+		prohibitedWords: [] as string[],
 	} as MiMeta;
 	let meta = metaInitial;