diff --git a/doc/api/esm.md b/doc/api/esm.md
index c4bed1c690df2d..6b6b964acbe0fd 100644
--- a/doc/api/esm.md
+++ b/doc/api/esm.md
@@ -1091,7 +1091,7 @@ async function getPackageType(url) {
   // required by the spec
   // this simple truthy check for whether `url` contains a file extension will
   // work for most projects but does not cover some edge-cases (such as
-  // extension-less files or a url ending in a trailing space)
+  // extensionless files or a url ending in a trailing space)
   const isFilePath = !!extname(url);
   // If it is a file path, get the directory it's in
   const dir = isFilePath ?
diff --git a/test/es-module/test-esm-unknown-or-no-extension.js b/test/es-module/test-esm-unknown-or-no-extension.js
index c43fa16d658bdc..40f840ad670cf3 100644
--- a/test/es-module/test-esm-unknown-or-no-extension.js
+++ b/test/es-module/test-esm-unknown-or-no-extension.js
@@ -34,7 +34,7 @@ const assert = require('assert');
     assert.ok(stderr.includes('ERR_UNKNOWN_FILE_EXTENSION'));
     if (fixturePath.includes('noext')) {
       // Check for explanation to users
-      assert.ok(stderr.includes('Extension-less'));
+      assert.ok(stderr.includes('extensionless'));
     }
   }));
 });