diff --git a/tools/tests/apps/modern/server/main.js b/tools/tests/apps/modern/server/main.js
index 3ce3d20aab..12ffcf4012 100644
--- a/tools/tests/apps/modern/server/main.js
+++ b/tools/tests/apps/modern/server/main.js
@@ -1,3 +1,10 @@
 import { Meteor } from "meteor/meteor";
 
 Meteor.startup(() => {});
+
+try {
+  const errorStack = new Error().stack;
+  console.log(errorStack);
+} catch (e) {
+  console.log(e);
+}
diff --git a/tools/tests/modern.js b/tools/tests/modern.js
index c49ef97294..189b1d01df 100644
--- a/tools/tests/modern.js
+++ b/tools/tests/modern.js
@@ -37,6 +37,9 @@ selftest.define("legacy build stack", async function () {
   await run.match(/safeWatcher\.watchLegacy/, false, true);
   await run.match(/_findSources for web\.browser.legacy/, false, true);
 
+  /* check debug stack */
+  await run.match(/server\/main\.js:6:22/, false, true);
+
   await run.stop();
 });
 
@@ -64,6 +67,9 @@ selftest.define("modern build stack", async function () {
   run.forbid(/Babel\.compile/, false, true);
   run.forbid(/_findSources for web\.browser\.legacy/, false, true);
 
+  /* check debug stack */
+  await run.match(/server\/main\.js:6:22/, false, true);
+
   await run.stop();
 });