diff --git a/packages/app/e2e/browser/tool-call-overview-sheet.spec.ts b/packages/app/e2e/browser/tool-call-overview-sheet.spec.ts
index dcb538945d..927585b545 100644
--- a/packages/app/e2e/browser/tool-call-overview-sheet.spec.ts
+++ b/packages/app/e2e/browser/tool-call-overview-sheet.spec.ts
@@ -266,14 +266,22 @@ test("keeps overview tool calls inline on desktop", async ({ page }) => {
   const agent = await createOverviewAgent(page, "Desktop overview tool calls");
 
   try {
+    const gate = await holdStreamAfterFirstCompletedToolCall(page, agent.agentId);
     await openOverviewAgent(page, agent);
     await agent.client.sendAgentMessage(agent.agentId, "Exercise desktop overview tool calls.");
+    await gate.waitForFirstCompleted();
     const group = page.getByTestId("tool-call-group").first();
     await expect(group).toBeVisible();
 
-    await group.click();
-    await expect(page.getByTestId("tool-call-group-sheet")).toHaveCount(0);
+    // Keep streaming layout changes out of the pointer-down/pointer-up interval.
+    const header = group.getByRole("button").first();
+    await header.click();
     await expect(group.getByTestId("tool-call-badge").first()).toBeVisible();
+    await expect(page.getByTestId("tool-call-group-sheet")).toHaveCount(0);
+
+    gate.release(1);
+    await expect.poll(() => group.getByTestId("tool-call-badge").count()).toBeGreaterThanOrEqual(2);
+    await expect(page.getByTestId("tool-call-group-sheet")).toHaveCount(0);
   } finally {
     await agent.cleanup();
   }