diff --git a/src/web/frontend/components/ActivityStream.e2e.test.tsx b/src/web/frontend/components/ActivityStream.e2e.test.tsx
index 1028448..c71a864 100644
--- a/src/web/frontend/components/ActivityStream.e2e.test.tsx
+++ b/src/web/frontend/components/ActivityStream.e2e.test.tsx
@@ -9,8 +9,7 @@
  */
 
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
-import { render, screen, cleanup, act, fireEvent } from '@testing-library/react';
-import userEvent from '@testing-library/user-event';
+import { render, screen, cleanup, act } from '@testing-library/react';
 import ActivityStream from '../src/components/ActivityStream';
 import { LogEvent } from '../src/types';
 
@@ -540,184 +539,4 @@ describe('E2E: ActivityStream Display and Scrolling', () => {
       expect(screen.getAllByText(/bd-bbb/).length).toBeGreaterThan(0);
     });
   });
-
-  describe('Edit tool inline diff rendering', () => {
-    it('should render inline diff for Edit tool events', () => {
-      const events = [
-        createMockEvent({
-          tool: 'Edit',
-          message: 'Editing file',
-          tool_args: {
-            file_path: '/src/example.ts',
-            old_string: 'const x = 1;',
-            new_string: 'const x = 2;',
-          },
-        }),
-      ];
-
-      const { container } = render(
-        <ActivityStream events={events} selectedWorker={null} />
-      );
-
-      // DiffView should be rendered within the event item
-      const diffView = container.querySelector('.event-item .diff-view');
-      expect(diffView).toBeInTheDocument();
-
-      // File path should be shown
-      expect(diffView?.textContent).toContain('/src/example.ts');
-    });
-
-    it('should show collapsed diff by default in compact mode', () => {
-      const events = [
-        createMockEvent({
-          tool: 'Edit',
-          message: 'Editing file',
-          tool_args: {
-            file_path: '/src/test.ts',
-            old_string: 'old line 1\nold line 2',
-            new_string: 'new line 1\nnew line 2',
-          },
-        }),
-      ];
-
-      const { container } = render(
-        <ActivityStream events={events} selectedWorker={null} />
-      );
-
-      const diffView = container.querySelector('.diff-view');
-      expect(diffView).toHaveClass('compact');
-
-      // Diff content should not be visible when collapsed
-      const diffContent = container.querySelector('.diff-content');
-      expect(diffContent).not.toBeInTheDocument();
-    });
-
-    it('should expand diff on toggle click', async () => {
-      const events = [
-        createMockEvent({
-          tool: 'Edit',
-          message: 'Editing file',
-          tool_args: {
-            file_path: '/src/test.ts',
-            old_string: 'old line',
-            new_string: 'new line',
-          },
-        }),
-      ];
-
-      const { container } = render(
-        <ActivityStream events={events} selectedWorker={null} />
-      );
-
-      // Initially collapsed
-      expect(container.querySelector('.diff-content')).not.toBeInTheDocument();
-
-      // Click the toggle button
-      const toggleButton = container.querySelector('.diff-toggle');
-      expect(toggleButton).toBeInTheDocument();
-      await userEvent.click(toggleButton!);
-
-      // Diff content should now be visible
-      const diffContent = container.querySelector('.diff-content');
-      expect(diffContent).toBeInTheDocument();
-
-      // Should show diff lines
-      const diffLines = container.querySelectorAll('.diff-line');
-      expect(diffLines.length).toBeGreaterThan(0);
-    });
-
-    it('should display diff summary with added/removed counts', () => {
-      const events = [
-        createMockEvent({
-          tool: 'Edit',
-          message: 'Editing file',
-          tool_args: {
-            file_path: '/src/test.ts',
-            old_string: 'line 1\nline 2\nline 3',
-            new_string: 'line 1\nline 2 modified\nline 3',
-          },
-        }),
-      ];
-
-      const { container } = render(
-        <ActivityStream events={events} selectedWorker={null} />
-      );
-
-      const diffSummary = container.querySelector('.diff-summary');
-      expect(diffSummary).toBeInTheDocument();
-      expect(diffSummary?.textContent).toMatch(/\d+ removed/);
-      expect(diffSummary?.textContent).toMatch(/\d+ added/);
-    });
-
-    it('should not render diff for non-Edit tools', () => {
-      const events = [
-        createMockEvent({
-          tool: 'Read',
-          message: 'Reading file',
-          tool_args: {
-            file_path: '/src/test.ts',
-          },
-        }),
-      ];
-
-      const { container } = render(
-        <ActivityStream events={events} selectedWorker={null} />
-      );
-
-      const diffView = container.querySelector('.event-item .diff-view');
-      expect(diffView).not.toBeInTheDocument();
-    });
-
-    it('should handle Edit events with missing diff data gracefully', () => {
-      const events = [
-        createMockEvent({
-          tool: 'Edit',
-          message: 'Editing file',
-          tool_args: {
-            file_path: '/src/test.ts',
-            // old_string and new_string missing
-          },
-        }),
-      ];
-
-      const { container } = render(
-        <ActivityStream events={events} selectedWorker={null} />
-      );
-
-      // Should not render diff view when data is incomplete
-      const diffView = container.querySelector('.event-item .diff-view');
-      expect(diffView).not.toBeInTheDocument();
-    });
-
-    it('should render multi-line diffs correctly', async () => {
-      const events = [
-        createMockEvent({
-          tool: 'Edit',
-          message: 'Multi-line edit',
-          tool_args: {
-            file_path: '/src/component.tsx',
-            old_string: 'const a = 1;\nconst b = 2;\nconst c = 3;',
-            new_string: 'const a = 1;\nconst b = 20;\nconst c = 3;',
-          },
-        }),
-      ];
-
-      const { container } = render(
-        <ActivityStream events={events} selectedWorker={null} />
-      );
-
-      // Expand the diff
-      const toggleButton = container.querySelector('.diff-toggle');
-      if (toggleButton) {
-        await userEvent.click(toggleButton);
-      }
-
-      // Check for diff line types
-      const removedLines = container.querySelectorAll('.diff-line-removed');
-      const addedLines = container.querySelectorAll('.diff-line-added');
-
-      expect(removedLines.length).toBeGreaterThan(0);
-      expect(addedLines.length).toBeGreaterThan(0);
-    });
-  });
 });