diff --git a/components/__tests__/TextInputArea.test.tsx b/components/__tests__/TextInputArea.test.tsx
index eff68e8..ec11f0b 100644
--- a/components/__tests__/TextInputArea.test.tsx
+++ b/components/__tests__/TextInputArea.test.tsx
@@ -1,5 +1,6 @@
 import { describe, expect, it, vi } from 'vitest';
 import { fireEvent, render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
 import TextInputArea from '@/components/TextInputArea';
 
 describe('TextInputArea 组件', () => {
@@ -107,38 +108,32 @@ describe('TextInputArea 组件', () => {
     });
 
     it('复制时调用 showMessage', async () => {
+      const user = userEvent.setup();
       const showMessage = vi.fn();
-      Object.assign(navigator, {
-        clipboard: { writeText: vi.fn().mockResolvedValue(undefined) },
-      });
+      const writeTextSpy = vi.spyOn(navigator.clipboard, 'writeText').mockResolvedValue(undefined);
 
       render(
         <TextInputArea value="测试" onChange={() => {}} allowCopy showMessage={showMessage} />,
       );
 
-      fireEvent.click(screen.getByRole('button', { name: 'textInputArea.copyContent' }));
+      await user.click(screen.getByRole('button', { name: 'textInputArea.copyContent' }));
 
-      expect(navigator.clipboard.writeText).toHaveBeenCalledWith('测试');
-      await vi.waitFor(() => {
-        expect(showMessage).toHaveBeenCalledWith('messages.copySuccess', { severity: 'success' });
-      });
+      expect(writeTextSpy).toHaveBeenCalledWith('测试');
+      expect(showMessage).toHaveBeenCalledWith('messages.copySuccess', { severity: 'success' });
     });
 
     it('复制失败时调用 showMessage 错误提示', async () => {
+      const user = userEvent.setup();
       const showMessage = vi.fn();
-      Object.assign(navigator, {
-        clipboard: { writeText: vi.fn().mockRejectedValue(new Error('失败')) },
-      });
+      vi.spyOn(navigator.clipboard, 'writeText').mockRejectedValue(new Error('失败'));
 
       render(
         <TextInputArea value="测试" onChange={() => {}} allowCopy showMessage={showMessage} />,
       );
 
-      fireEvent.click(screen.getByRole('button', { name: 'textInputArea.copyContent' }));
+      await user.click(screen.getByRole('button', { name: 'textInputArea.copyContent' }));
 
-      await vi.waitFor(() => {
-        expect(showMessage).toHaveBeenCalledWith('messages.copyError', { severity: 'error' });
-      });
+      expect(showMessage).toHaveBeenCalledWith('messages.copyError', { severity: 'error' });
     });
   });
 
@@ -377,19 +372,16 @@ describe('TextInputArea 组件', () => {
 
   describe('showMessage prop', () => {
     it('复制成功时调用 showMessage', async () => {
+      const user = userEvent.setup();
       const showMessage = vi.fn();
-      Object.assign(navigator, {
-        clipboard: { writeText: vi.fn().mockResolvedValue(undefined) },
-      });
+      vi.spyOn(navigator.clipboard, 'writeText').mockResolvedValue(undefined);
 
       render(
         <TextInputArea value="测试" onChange={() => {}} allowCopy showMessage={showMessage} />,
       );
-      fireEvent.click(screen.getByRole('button', { name: 'textInputArea.copyContent' }));
+      await user.click(screen.getByRole('button', { name: 'textInputArea.copyContent' }));
 
-      await vi.waitFor(() => {
-        expect(showMessage).toHaveBeenCalledWith('messages.copySuccess', { severity: 'success' });
-      });
+      expect(showMessage).toHaveBeenCalledWith('messages.copySuccess', { severity: 'success' });
     });
   });
 
diff --git a/pages/Base64Converter/__tests__/FileMode.test.tsx b/pages/Base64Converter/__tests__/FileMode.test.tsx
index 6ea313f..09cd890 100644
--- a/pages/Base64Converter/__tests__/FileMode.test.tsx
+++ b/pages/Base64Converter/__tests__/FileMode.test.tsx
@@ -20,14 +20,16 @@ beforeEach(() => {
 const waitForStorageReady = () => act(() => Promise.resolve());
 
 describe('FileMode', () => {
-  it('应该渲染文件上传区域', () => {
+  it('应该渲染文件上传区域', async () => {
     render(<FileMode />);
+    await waitForStorageReady();
     expect(screen.getByText('clickOrDropToFile')).toBeInTheDocument();
     expect(screen.getByText('maxFileSize')).toBeInTheDocument();
   });
 
   it('应该处理有效的文件选择', async () => {
     render(<FileMode />);
+    await waitForStorageReady();
 
     const file = new File(['test content'], 'test.txt', { type: 'text/plain' });
 
@@ -43,6 +45,7 @@ describe('FileMode', () => {
 
   it('应该拒绝超出大小限制的文件', async () => {
     render(<FileMode />);
+    await waitForStorageReady();
 
     // 创建一个超过 10MB 的文件
     const largeContent = new Uint8Array(11 * 1024 * 1024);
@@ -58,6 +61,7 @@ describe('FileMode', () => {
 
   it('点击清除按钮应该清空文件状态', async () => {
     render(<FileMode />);
+    await waitForStorageReady();
 
     const file = new File(['test'], 'test.txt', { type: 'text/plain' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;
@@ -77,6 +81,7 @@ describe('FileMode', () => {
 
   it('应该显示文件大小和类型信息', async () => {
     render(<FileMode />);
+    await waitForStorageReady();
 
     const file = new File(['test content'], 'test.txt', { type: 'text/plain' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;
@@ -91,6 +96,7 @@ describe('FileMode', () => {
 
   it('应该显示原始大小和编码大小', async () => {
     render(<FileMode />);
+    await waitForStorageReady();
 
     const file = new File(['test content'], 'test.txt', { type: 'text/plain' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;
@@ -104,6 +110,7 @@ describe('FileMode', () => {
 
   it('应该提供复制按钮', async () => {
     render(<FileMode />);
+    await waitForStorageReady();
 
     const file = new File(['test'], 'test.txt', { type: 'text/plain' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;
diff --git a/pages/Base64Converter/__tests__/ImageMode.test.tsx b/pages/Base64Converter/__tests__/ImageMode.test.tsx
index 18fa006..bcc163a 100644
--- a/pages/Base64Converter/__tests__/ImageMode.test.tsx
+++ b/pages/Base64Converter/__tests__/ImageMode.test.tsx
@@ -18,14 +18,16 @@ beforeEach(() => {
 const waitForStorageReady = () => act(() => Promise.resolve());
 
 describe('ImageMode', () => {
-  it('应该渲染图像上传区域', () => {
+  it('应该渲染图像上传区域', async () => {
     render(<ImageMode />);
+    await waitForStorageReady();
     expect(screen.getByText('clickOrDropToImage')).toBeInTheDocument();
     expect(screen.getByText('supportedFormats')).toBeInTheDocument();
   });
 
   it('应该接受有效的图像文件', async () => {
     render(<ImageMode />);
+    await waitForStorageReady();
 
     const file = new File(['fake-image-data'], 'test.png', { type: 'image/png' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;
@@ -39,6 +41,7 @@ describe('ImageMode', () => {
 
   it('应该拒绝非图像文件', async () => {
     render(<ImageMode />);
+    await waitForStorageReady();
 
     const file = new File(['not an image'], 'test.txt', { type: 'text/plain' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;
@@ -51,6 +54,7 @@ describe('ImageMode', () => {
 
   it('应该拒绝超出大小限制的图像', async () => {
     render(<ImageMode />);
+    await waitForStorageReady();
 
     const largeContent = new Uint8Array(11 * 1024 * 1024);
     const file = new File([largeContent], 'large.png', { type: 'image/png' });
@@ -65,6 +69,7 @@ describe('ImageMode', () => {
 
   it('应该通过扩展名识别图像', async () => {
     render(<ImageMode />);
+    await waitForStorageReady();
 
     // 没有 MIME 类型但有正确扩展名
     const file = new File(['fake'], 'test.jpg');
@@ -78,6 +83,7 @@ describe('ImageMode', () => {
 
   it('点击清除按钮应该清空图像状态', async () => {
     render(<ImageMode />);
+    await waitForStorageReady();
 
     const file = new File(['fake'], 'test.png', { type: 'image/png' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;
@@ -97,6 +103,7 @@ describe('ImageMode', () => {
 
   it('应该显示图像预览', async () => {
     render(<ImageMode />);
+    await waitForStorageReady();
 
     const file = new File(['fake-image'], 'test.png', { type: 'image/png' });
     const hiddenInput = document.querySelector('input[type="file"]') as HTMLInputElement;