diff --git a/__tests__/unit/core/index-spec.ts b/__tests__/unit/core/index-spec.ts
index 834421a99a1..e06be29aa7a 100644
--- a/__tests__/unit/core/index-spec.ts
+++ b/__tests__/unit/core/index-spec.ts
@@ -201,7 +201,7 @@ describe('core', () => {
     expect(line.triggerResize).toHaveBeenCalledTimes(0);
 
     container.style.width = `${container.clientWidth + 10}px`;
-    await delay(200);
+    await delay(500);
     // @ts-ignore
     expect(line.triggerResize).toHaveBeenCalledTimes(1);
 
diff --git a/__tests__/unit/plots/word-cloud/change-data-spec.ts b/__tests__/unit/plots/word-cloud/change-data-spec.ts
index 5393648a8ef..436e51601b1 100644
--- a/__tests__/unit/plots/word-cloud/change-data-spec.ts
+++ b/__tests__/unit/plots/word-cloud/change-data-spec.ts
@@ -1,41 +1,47 @@
 import { WordCloud } from '../../../../src';
 import { CountryEconomy } from '../../../data/country-economy';
+import { delay } from '../../../utils/delay';
 import { createDiv } from '../../../utils/dom';
 
 describe('word-cloud changeData', () => {
-  it('changeData: normal', () => {
+  it('changeData: normal', async () => {
     const cloud = new WordCloud(createDiv(), {
       width: 1024,
       height: 1024,
       data: CountryEconomy,
       wordField: 'Country',
       weightField: 'GDP',
+      animation: false,
     });
 
     cloud.render();
 
+    await delay(500);
     expect(cloud.chart.geometries[0].elements.length).toEqual(CountryEconomy.length + 2);
 
     const newData = CountryEconomy.slice(0, 20);
     cloud.changeData(newData);
+    await delay(500);
     expect(cloud.chart.geometries[0].elements.length).toEqual(newData.length + 2);
     expect(cloud.options.data).toEqual(newData);
 
     cloud.destroy();
   });
 
-  it('changeData: from empty to have data', () => {
+  it('changeData: from empty to have data', async () => {
     const cloud = new WordCloud(createDiv(), {
       width: 1024,
       height: 1024,
       data: [],
       wordField: 'Country',
       weightField: 'GDP',
+      animation: false,
     });
 
     cloud.render();
 
     cloud.changeData(CountryEconomy);
+    await delay(500);
     expect(cloud.chart.geometries[0].elements.length).toEqual(CountryEconomy.length + 2);
     expect(cloud.options.data).toEqual(CountryEconomy);