nodejs
diff --git a/‎lib/internal/process/esm_loader.js‎
Lines changed: 6 additions & 0 deletions b/‎lib/internal/process/esm_loader.js‎
Lines changed: 6 additions & 0 deletions
diff --git a/‎test/es-module/test-esm-dynamic-import.js‎
Lines changed: 3 additions & 0 deletions b/‎test/es-module/test-esm-dynamic-import.js‎
Lines changed: 3 additions & 0 deletions
@@ -24,6 +24,12 @@ exports.initializeImportMetaObject = function(wrap, meta) {
 
 exports.importModuleDynamicallyCallback = async function(wrap, specifier) {
   assert(calledInitialize === true || !userLoader);
+  if (!calledInitialize) {
+    process.emitWarning(
+      'The ESM module loader is experimental.',
+      'ExperimentalWarning', undefined);
+    calledInitialize = true;
+  }
   const { callbackMap } = internalBinding('module_wrap');
   if (callbackMap.has(wrap)) {
     const { importModuleDynamically } = callbackMap.get(wrap);
 
@@ -42,6 +42,9 @@ function expectFsNamespace(result) {
 // For direct use of import expressions inside of CJS or ES modules, including
 // via eval, all kinds of specifiers should work without issue.
 (function testScriptOrModuleImport() {
+  common.expectWarning('ExperimentalWarning',
+                       'The ESM module loader is experimental.');
+
   // Importing another file, both direct & via eval
   // expectOkNamespace(import(relativePath));
   expectOkNamespace(eval(`import("${relativePath}")`));