diff --git a/ui/src/components/transcript/RunTranscriptView.test.tsx b/ui/src/components/transcript/RunTranscriptView.test.tsx
index e1a869caa34..41f635d2b3f 100644
--- a/ui/src/components/transcript/RunTranscriptView.test.tsx
+++ b/ui/src/components/transcript/RunTranscriptView.test.tsx
@@ -1,32 +1,11 @@
-// @vitest-environment jsdom
+// @vitest-environment node
 
-import { act, type ReactNode } from "react";
-import { describe, expect, it, vi } from "vitest";
+import { describe, expect, it } from "vitest";
 import { renderToStaticMarkup } from "react-dom/server";
-import { createRoot, type Root } from "react-dom/client";
 import type { TranscriptEntry } from "../../adapters";
 import { ThemeProvider } from "../../context/ThemeContext";
 import { RunTranscriptView, normalizeTranscript } from "./RunTranscriptView";
 
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-(globalThis as any).IS_REACT_ACT_ENVIRONMENT = true;
-
-function render(ui: ReactNode) {
-  const container = document.createElement("div");
-  document.body.appendChild(container);
-  const root: Root = createRoot(container);
-  act(() => {
-    root.render(ui);
-  });
-  return {
-    container,
-    unmount: () => {
-      act(() => root.unmount());
-      container.remove();
-    },
-  };
-}
-
 describe("RunTranscriptView", () => {
   it("keeps running command stdout inside the command fold instead of a standalone stdout block", () => {
     const entries: TranscriptEntry[] = [
@@ -131,38 +110,4 @@ describe("RunTranscriptView", () => {
     expect(html).toMatch(/<li[^>]*>posted issue update<\/li>/);
     expect(html).not.toContain("result");
   });
-
-  it("adds timestamp and age tooltip to raw mode labels lazily on hover", () => {
-    vi.useFakeTimers();
-    vi.setSystemTime(new Date("2026-03-12T00:03:00.000Z"));
-    const { container, unmount } = render(
-      <ThemeProvider>
-        <RunTranscriptView
-          mode="raw"
-          entries={[
-            {
-              kind: "stdout",
-              ts: "2026-03-12T00:00:00.000Z",
-              text: "hello",
-            },
-          ]}
-        />
-      </ThemeProvider>,
-    );
-    try {
-      const label = container.querySelector("span[data-timestamp]");
-      expect(label?.textContent).toBe("stdout");
-      expect(label?.getAttribute("title")).toBeNull();
-
-      act(() => {
-        label?.dispatchEvent(new MouseEvent("mouseover", { bubbles: true }));
-      });
-
-      expect(label?.getAttribute("title")).toContain("Timestamp:");
-      expect(label?.getAttribute("title")).toContain("Ago: 3m ago");
-    } finally {
-      unmount();
-      vi.useRealTimers();
-    }
-  });
 });
diff --git a/ui/src/components/transcript/RunTranscriptView.tsx b/ui/src/components/transcript/RunTranscriptView.tsx
index b20deeae374..fee3a561e89 100644
--- a/ui/src/components/transcript/RunTranscriptView.tsx
+++ b/ui/src/components/transcript/RunTranscriptView.tsx
@@ -1,8 +1,7 @@
-import { useMemo, useState, type MouseEvent as ReactMouseEvent } from "react";
+import { useMemo, useState } from "react";
 import type { TranscriptEntry } from "../../adapters";
 import { MarkdownBody } from "../MarkdownBody";
-import { timeAgo } from "../../lib/timeAgo";
-import { cn, formatDateTime, formatTokens } from "../../lib/utils";
+import { cn, formatTokens } from "../../lib/utils";
 import {
   Check,
   ChevronDown,
@@ -137,18 +136,6 @@ function truncate(value: string, max: number): string {
   return value.length > max ? `${value.slice(0, Math.max(0, max - 1))}…` : value;
 }
 
-function formatRawEntryTimestampTooltip(ts: string): string {
-  if (Number.isNaN(new Date(ts).getTime())) return ts;
-  return `Timestamp: ${formatDateTime(ts)}; Ago: ${timeAgo(ts)}`;
-}
-
-function handleRawTimestampLabelHover(event: ReactMouseEvent<HTMLSpanElement>) {
-  if (event.currentTarget.title) return;
-  const ts = event.currentTarget.dataset.timestamp;
-  if (!ts) return;
-  event.currentTarget.title = formatRawEntryTimestampTooltip(ts);
-}
-
 function humanizeLabel(value: string): string {
   return value
     .replace(/[_-]+/g, " ")
@@ -1378,11 +1365,7 @@ function RawTranscriptView({
             "grid-cols-[auto_1fr]",
           )}
         >
-          <span
-            className="text-[10px] uppercase tracking-[0.18em] text-muted-foreground"
-            data-timestamp={entry.ts}
-            onMouseEnter={handleRawTimestampLabelHover}
-          >
+          <span className="text-[10px] uppercase tracking-[0.18em] text-muted-foreground">
             {entry.kind}
           </span>
           <pre className="min-w-0 whitespace-pre-wrap break-words text-foreground/80">