diff --git a/frontend/src/app/pages/AgentChat/parsing/isNarration.test.ts b/frontend/src/app/pages/AgentChat/parsing/isNarration.test.ts
index dcb807d4..ec5b1ac2 100644
--- a/frontend/src/app/pages/AgentChat/parsing/isNarration.test.ts
+++ b/frontend/src/app/pages/AgentChat/parsing/isNarration.test.ts
@@ -11,7 +11,7 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 
-import { isNarration } from './isNarration.js';
+import { isNarration } from './isNarration.ts';
 
 test('short passing remarks are narration', () => {
   for (const s of [
diff --git a/frontend/src/app/pages/Dashboard/canvas/revealZoom.test.ts b/frontend/src/app/pages/Dashboard/canvas/revealZoom.test.ts
index 8627671d..98099eda 100644
--- a/frontend/src/app/pages/Dashboard/canvas/revealZoom.test.ts
+++ b/frontend/src/app/pages/Dashboard/canvas/revealZoom.test.ts
@@ -1,7 +1,7 @@
 // Run: cd frontend && npx tsx --test src/app/pages/Dashboard/canvas/revealZoom.test.ts
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
-import { revealZoom, REVEAL_MIN_ZOOM } from './revealZoom.js';
+import { revealZoom, REVEAL_MIN_ZOOM } from './revealZoom.ts';
 
 const MIN = 0.15, MAX = 3.0;