1 files changed, 12 insertions, 1 deletions
diff --git a/tests/unit_node/module_test.ts b/tests/unit_node/module_test.ts
index cfb9a4ebf..c17aabc72 100644
--- a/tests/unit_node/module_test.ts
+++ b/tests/unit_node/module_test.ts
@@ -1,6 +1,12 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
-import { builtinModules, createRequire, isBuiltin, Module } from "node:module";
+import {
+  builtinModules,
+  createRequire,
+  findSourceMap,
+  isBuiltin,
+  Module,
+} from "node:module";
 import { assert, assertEquals } from "@std/assert/mod.ts";
 import process from "node:process";
 import * as path from "node:path";
@@ -88,3 +94,8 @@ Deno.test("[node/module isBuiltin] recognizes node builtins", () => {
 Deno.test("[node/module builtinModules] has 'module' in builtins", () => {
   assert(builtinModules.includes("module"));
 });
+
+// https://github.com/denoland/deno/issues/18666
+Deno.test("[node/module findSourceMap] is a function", () => {
+  assertEquals(findSourceMap("foo"), undefined);
+});