diff --git a/src/resources/extensions/sf/tests/auto-supervisor.test.mjs b/src/resources/extensions/sf/tests/auto-supervisor.test.mjs
index 6b666628a..ec5bcc3e5 100644
--- a/src/resources/extensions/sf/tests/auto-supervisor.test.mjs
+++ b/src/resources/extensions/sf/tests/auto-supervisor.test.mjs
@@ -3,11 +3,11 @@ import { mkdtempSync, readFileSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { test } from 'vitest';
-import { resolveAutoSupervisorConfig } from "../preferences.ts";
+import { resolveAutoSupervisorConfig } from "../preferences.js";
 import {
 	readUnitRuntimeRecord,
 	writeUnitRuntimeRecord,
-} from "../unit-runtime.ts";
+} from "../unit-runtime.js";
 
 test("resolveAutoSupervisorConfig provides safe timeout defaults", () => {
 	const supervisor = resolveAutoSupervisorConfig();