diff --git a/test/mobile/keyboard.test.ts b/test/mobile/keyboard.test.ts
index 91cf4000..a6ddb765 100644
--- a/test/mobile/keyboard.test.ts
+++ b/test/mobile/keyboard.test.ts
@@ -1254,7 +1254,11 @@ describe('Virtual Keyboard', () => {
     });
 
     it('keeps terminal touch drag available for scrollback with the visible textarea enabled', async () => {
-      const calls = await page.evaluate(async () => {
+      // A Codex pane with REAL local scrollback (an older inline Codex, or any pane
+      // whose output scrolled lines into xterm's normal buffer). A blank pane is
+      // hollow and correctly pages the CLI instead (terminal-touch-paging.browser
+      // test), so the history is written first and checked before the drag.
+      const result = await page.evaluate(async () => {
         app.activeSessionId = 'mobile-touch-scroll-test';
         app.sessions.set('mobile-touch-scroll-test', {
           id: 'mobile-touch-scroll-test',
@@ -1262,22 +1266,42 @@ describe('Virtual Keyboard', () => {
           status: 'running',
         });
         app.hideWelcome();
+        const settings = app.loadAppSettingsFromStorage();
+        settings.cjkInputEnabled = true;
+        app.saveAppSettingsToStorage(settings);
+        app._serverCjkOverride = true;
         app._updateCjkInputState();
 
+        const history = Array.from({ length: 200 }, (_, i) => `history line ${i}`).join('\r\n') + '\r\n';
+        await new Promise<void>((resolve) => app.terminal.write(history, resolve));
+        app.terminal.scrollToBottom();
+        const buffer = app.terminal.buffer.active;
+        const before = {
+          type: buffer.type,
+          baseY: buffer.baseY,
+          viewportY: buffer.viewportY,
+          hollow: app._localScrollbackIsHollow(),
+          forwards: app._shouldForwardWheelToApp({ shiftKey: false }),
+          cjkVisible: document.body.classList.contains('cjk-input-visible'),
+        };
+
         const originalScrollLines = app.terminal.scrollLines.bind(app.terminal);
         const scrollCalls: number[] = [];
         app.terminal.scrollLines = (lines: number) => {
           scrollCalls.push(lines);
           return originalScrollLines(lines);
         };
+        const sentToCli: string[] = [];
+        app._sendInputEphemeral = (_id: string, data: string) => sentToCli.push(data);
 
         const target =
           document.querySelector('#terminalContainer .xterm-screen') ?? document.getElementById('terminalContainer');
-        if (!target) return scrollCalls;
+        if (!target) return { before, scrollCalls, sentToCli, viewportAfter: -1 };
         const rect = target.getBoundingClientRect();
         const x = rect.left + rect.width / 2;
-        const startY = rect.top + Math.min(180, rect.height - 20);
-        const endY = startY - 120;
+        // The finger moves DOWN the screen, so the content follows it back into history.
+        const startY = rect.top + 20;
+        const endY = startY + 120;
 
         function createTouch(y: number) {
           return new Touch({
@@ -1315,11 +1339,23 @@ describe('Virtual Keyboard', () => {
           })
         );
         await new Promise((resolve) => setTimeout(resolve, 50));
-        return scrollCalls;
+        app._flushWheelSgrQueue?.();
+        return { before, scrollCalls, sentToCli, viewportAfter: app.terminal.buffer.active.viewportY };
       });
 
-      expect(calls.length).toBeGreaterThan(0);
-      expect(calls.some((lines) => lines !== 0)).toBe(true);
+      // The scenario is real local scrollback with the visible textarea on.
+      expect(result.before.cjkVisible).toBe(true);
+      expect(result.before.type).toBe('normal');
+      expect(result.before.baseY).toBeGreaterThan(0);
+      expect(result.before.viewportY).toBe(result.before.baseY);
+      expect(result.before.hollow).toBe(false);
+      expect(result.before.forwards).toBe(false);
+
+      // The drag scrolled xterm's own history upward, and sent nothing to the CLI.
+      expect(result.scrollCalls.length).toBeGreaterThan(0);
+      expect(result.scrollCalls.some((lines) => lines < 0)).toBe(true);
+      expect(result.viewportAfter).toBeLessThan(result.before.viewportY);
+      expect(result.sentToCli).toEqual([]);
     });
 
     it('keeps typed phone text in the terminal local echo path', async () => {