diff --git a/lib/cli/cli.js b/lib/cli/cli.js
index dc0ace7752..dee8e70dd4 100755
--- a/lib/cli/cli.js
+++ b/lib/cli/cli.js
@@ -12,12 +12,12 @@
  */
 
 const debug = require('debug')('mocha:cli:cli');
+const symbols = require('log-symbols');
 const yargs = require('yargs/yargs');
 const path = require('path');
-const ansi = require('ansi-colors');
-const symbols = require('log-symbols');
 const {loadOptions, YARGS_PARSER_CONFIG} = require('./options');
 const commands = require('./commands');
+const ansi = require('ansi-colors');
 const {repository, homepage, version, gitter} = require('../../package.json');
 
 /**
@@ -48,9 +48,7 @@ exports.main = (argv = process.argv.slice(2)) => {
     .fail((msg, err, yargs) => {
       debug(err);
       yargs.showHelp();
-      console.error(
-        `\n${symbols.error} ${ansi.red('ERROR:')} ${err ? err.message : msg}`
-      );
+      console.error(`\n${symbols.error} ${ansi.red('ERROR:')} ${msg}`);
       process.exit(1);
     })
     .help('help', 'Show usage information & exit')
diff --git a/lib/cli/run.js b/lib/cli/run.js
index 4b59a13ecd..9c9911131d 100644
--- a/lib/cli/run.js
+++ b/lib/cli/run.js
@@ -87,7 +87,7 @@ exports.builder = yargs =>
       },
       extension: {
         default: defaults.extension,
-        defaultDescription: 'js,cjs,mjs',
+        defaultDescription: 'js',
         description: 'File extension(s) to load',
         group: GROUPS.FILES,
         requiresArg: true,
diff --git a/package.json b/package.json
index e9f1032e55..8cad374e94 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
     "growl": "1.10.5",
     "he": "1.2.0",
     "js-yaml": "3.13.1",
-    "log-symbols": "^3.0.0",
+    "log-symbols": "3.0.0",
     "minimatch": "3.0.4",
     "mkdirp": "0.5.1",
     "ms": "2.1.1",