diff --git a/test/ut/extend/i18n.ts b/test/ut/extend/i18n.ts
deleted file mode 100644
index a871445a..00000000
--- a/test/ut/extend/i18n.ts
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import chai from 'chai';
-import sinon from 'sinon';
-import {
-  describe,
-  it,
-  after
-} from 'mocha';
-import {
-  fakeLog,
-  fakeLogRestore
-} from '../../fakeLog';
-import i18n from '../../../runtime/main/extend/i18n';
-import { getValue } from '../../../runtime/utils';
-
-const expect = chai.expect;
-
-describe('api of i18n', () => {
-  fakeLog();
-
-  const i18nOptions0 = {
-    locale: 'zh',
-    messages: [
-      {
-        'strings': {
-          'hello': 'hello'
-        },
-        'files': {
-          'image': 'image/rain_bg.jpg'
-        }
-      },
-      {
-        'strings': {
-          'hello': 'Hello world!',
-          'object': 'Object parameter substitution-{name}',
-          'object1': 'Object parameter substitution-{name1}-{name0}',
-          'array': 'Array type parameter substitution-{0}',
-          'array1': 'Array type parameter substitution-{1}-{0}-{2}',
-          'num': 1,
-          'bool': true,
-          'plurals': {
-            'one': 'one person',
-            'other': '{count} people'
-          }
-        },
-        'files': {
-          'image': 'image/en_picture.PNG'
-        }
-      }
-    ]
-  };
-  const i18nOptions1 = {
-    locale: 'en',
-    messages: [[], {'strings': 'hello'}]
-  };
-  const i18nPluralRules = {
-    select: (count) => {
-      return count === 1 ? 'one' : 'other';
-    }
-  };
-  const I18n = i18n.I18n.create(0).instance.I18n;
-  const i18nInstance0 = new I18n(i18nOptions0);
-  const i18nInstance1 = new I18n(i18nOptions1);
-  const fakeGetChoice = sinon.stub(i18nInstance0, '_getChoice').callsFake((count, path, message) => {
-    const pluralChoice = i18nPluralRules.select(count);
-    if (!pluralChoice) {
-      return path;
-    }
-    return getValue(pluralChoice, message);
-  });
-
-  after(() => {
-    fakeGetChoice.restore();
-  });
-
-  describe('i18n', () => {
-    it('$t(path)', () => {
-      expect(i18nInstance0.$t).to.be.an.instanceof(Function);
-      expect(i18nInstance0.$t('strings.hello')).eql('hello');
-      expect(i18nInstance0.$t('strings.num')).eql(1);
-      expect(i18nInstance0.$t('strings.bool')).to.be.true;
-      expect(i18nInstance0.$t('files.image')).eql('image/rain_bg.jpg');
-      expect(i18nInstance0.$t('strings.plurals.one')).eql('one person');
-      expect(i18nInstance0.$t('strings.plurals')).eql({
-        'one': 'one person',
-        'other': '{count} people'
-      });
-      expect(i18nInstance0.$t('strings.plurals')['one']).eql('one person');
-      expect(i18nInstance0.$t('strings.plurals')['two']).eql(undefined);
-      expect(i18nInstance0.$t('strings.hell.key')).eql('strings.hell.key');
-      expect(i18nInstance0.$t(null)).to.be.undefined;
-      expect(i18nInstance0.$t(undefined)).to.be.undefined;
-
-      // @ts-ignore
-      expect(i18nInstance0.$t(1)).to.be.undefined;
-    });
-
-    it('$t(path, params)', () => {
-      expect(i18nInstance0.$t('strings.object', {'name': 'object_value'}))
-        .eql('Object parameter substitution-object_value');
-      expect(i18nInstance0.$t('strings.object1', {'name0': 'object_value_0', 'name1': 'object_value_1'}))
-        .eql('Object parameter substitution-object_value_1-object_value_0');
-      expect(i18nInstance0.$t('strings.array', [1]))
-        .eql('Array type parameter substitution-1');
-      expect(i18nInstance0.$t('strings.array1', [1, false]))
-        .eql('Array type parameter substitution-false-1-');
-      expect(i18nInstance0.$t('strings.array1', null))
-        .eql('Array type parameter substitution-{1}-{0}-{2}');
-      expect(i18nInstance0.$t('strings.array1', undefined))
-        .eql('Array type parameter substitution-{1}-{0}-{2}');
-      expect(i18nInstance0.$t('strings.array1', 1))
-        .eql('Array type parameter substitution-{1}-{0}-{2}');
-      expect(i18nInstance0.$t('strings.array1', {0: 'object_value_0', 1: 'object_value_1'}))
-        .eql('Array type parameter substitution-object_value_1-object_value_0-');
-      expect(i18nInstance0.$t('strings.array1', {'name0': 'object_value_0', 'name1': 'object_value_1'}))
-        .eql('Array type parameter substitution---');
-    });
-
-    it('$tc(path, count)', () => {
-      expect(i18nInstance0.$tc).to.be.an.instanceof(Function);
-      expect(i18nInstance0.$tc('strings.plurals', 0)).eql('0 people');
-      expect(i18nInstance0.$tc('strings.plurals', 1)).eql('one person');
-      expect(i18nInstance0.$tc('strings.plurals', undefined)).eql('one person');
-      expect(i18nInstance0.$tc('strings.plurals')).eql('one person');
-      expect(i18nInstance0.$tc('strings.plurals', null)).eql('one person');
-      expect(i18nInstance0.$tc('strings.hello', 0)).eql('strings.hello');
-      expect(i18nInstance0.$tc('strings.hello')).eql('strings.hello');
-      expect(i18nInstance0.$tc(null)).to.be.undefined;
-      expect(i18nInstance0.$tc(undefined)).to.be.undefined;
-
-      // @ts-ignore
-      expect(i18nInstance0.$tc(1)).to.be.undefined;
-    });
-
-    it('messages are null', () => {
-      expect(i18nInstance1.$t('strings.hello')).eql('strings.hello');
-      expect(i18nInstance1.$t('strings')).eql('hello');
-    });
-  });
-
-  fakeLogRestore();
-});