diff --git a/packages/backend/test/e2e/2fa.ts b/packages/backend/test/e2e/2fa.ts
index 88c32b4346..92758d59b8 100644
--- a/packages/backend/test/e2e/2fa.ts
+++ b/packages/backend/test/e2e/2fa.ts
@@ -199,12 +199,10 @@ describe('2要素認証', () => {
 		const signinWithoutTokenResponse = await api('signin', {
 			...signinParam(),
 		});
-		assert.strictEqual(signinWithoutTokenResponse.status, 403);
+		assert.strictEqual(signinWithoutTokenResponse.status, 200);
 		assert.deepStrictEqual(signinWithoutTokenResponse.body, {
-			error: {
-				id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
-				next: 'totp',
-			},
+			finished: false,
+			next: 'totp',
 		});
 
 		const signinResponse = await api('signin', {
@@ -212,6 +210,7 @@ describe('2要素認証', () => {
 			token: otpToken(registerResponse.body.secret),
 		});
 		assert.strictEqual(signinResponse.status, 200);
+		assert.strictEqual(signinResponse.body.finished, true);
 		assert.notEqual(signinResponse.body.i, undefined);
 
 		// 後片付け
@@ -255,26 +254,20 @@ describe('2要素認証', () => {
 		const signinResponse = await api('signin', {
 			...signinParam(),
 		});
-		const signinResponseBody = signinResponse.body as unknown as {
-			error: {
-				id: string;
-				next: 'passkey';
-				authRequest: PublicKeyCredentialRequestOptionsJSON;
-			};
-		};
-		assert.strictEqual(signinResponse.status, 403);
-		assert.strictEqual(signinResponseBody.error.id, '06e661b9-8146-4ae3-bde5-47138c0ae0c4');
-		assert.strictEqual(signinResponseBody.error.next, 'passkey');
-		assert.notEqual(signinResponseBody.error.authRequest.challenge, undefined);
-		assert.notEqual(signinResponseBody.error.authRequest.allowCredentials, undefined);
-		assert.strictEqual(signinResponseBody.error.authRequest.allowCredentials && signinResponseBody.error.authRequest.allowCredentials[0]?.id, credentialId.toString('base64url'));
+		assert.strictEqual(signinResponse.status, 200);
+		assert.strictEqual(signinResponse.body.finished, false);
+		assert.strictEqual(signinResponse.body.next, 'passkey');
+		assert.notEqual(signinResponse.body.authRequest.challenge, undefined);
+		assert.notEqual(signinResponse.body.authRequest.allowCredentials, undefined);
+		assert.strictEqual(signinResponse.body.authRequest.allowCredentials && signinResponse.body.authRequest.allowCredentials[0]?.id, credentialId.toString('base64url'));
 
 		const signinResponse2 = await api('signin', signinWithSecurityKeyParam({
 			keyName,
 			credentialId,
-			requestOptions: signinResponseBody.error.authRequest,
+			requestOptions: signinResponse.body.authRequest,
 		}));
 		assert.strictEqual(signinResponse2.status, 200);
+		assert.strictEqual(signinResponse2.body.finished, true);
 		assert.notEqual(signinResponse2.body.i, undefined);
 
 		// 後片付け
@@ -324,28 +317,22 @@ describe('2要素認証', () => {
 			...signinParam(),
 			password: '',
 		});
-		const signinResponseBody = signinResponse.body as unknown as {
-			error: {
-				id: string;
-				next: 'passkey';
-				authRequest: PublicKeyCredentialRequestOptionsJSON;
-			};
-		};
-		assert.strictEqual(signinResponse.status, 403);
-		assert.strictEqual(signinResponseBody.error.id, '06e661b9-8146-4ae3-bde5-47138c0ae0c4');
-		assert.strictEqual(signinResponseBody.error.next, 'passkey');
-		assert.notEqual(signinResponseBody.error.authRequest.challenge, undefined);
-		assert.notEqual(signinResponseBody.error.authRequest.allowCredentials, undefined);
+		assert.strictEqual(signinResponse.status, 200);
+		assert.strictEqual(signinResponse.body.finished, false);
+		assert.strictEqual(signinResponse.body.next, 'passkey');
+		assert.notEqual(signinResponse.body.authRequest.challenge, undefined);
+		assert.notEqual(signinResponse.body.authRequest.allowCredentials, undefined);
 
 		const signinResponse2 = await api('signin', {
 			...signinWithSecurityKeyParam({
 				keyName,
 				credentialId,
-				requestOptions: signinResponseBody.error.authRequest,
+				requestOptions: signinResponse.body.authRequest,
 			} as any),
 			password: '',
 		});
 		assert.strictEqual(signinResponse2.status, 200);
+		assert.strictEqual(signinResponse2.body.finished, true);
 		assert.notEqual(signinResponse2.body.i, undefined);
 
 		// 後片付け
@@ -455,6 +442,7 @@ describe('2要素認証', () => {
 			token: otpToken(registerResponse.body.secret),
 		});
 		assert.strictEqual(signinResponse.status, 200);
+		assert.strictEqual(signinResponse.body.finished, true);
 		assert.notEqual(signinResponse.body.i, undefined);
 
 		// 後片付け
@@ -489,6 +477,7 @@ describe('2要素認証', () => {
 			...signinParam(),
 		});
 		assert.strictEqual(signinResponse.status, 200);
+		assert.strictEqual(signinResponse.body.finished, true);
 		assert.notEqual(signinResponse.body.i, undefined);
 
 		// 後片付け