diff --git a/src/browser/main.coffee b/src/browser/main.coffee
index 1fae16ea9..989ef537b 100644
--- a/src/browser/main.coffee
+++ b/src/browser/main.coffee
@@ -85,7 +85,7 @@ parseCommandLine = ->
   options.alias('h', 'help').boolean('h').describe('h', 'Print this usage message.')
   options.alias('l', 'log-file').string('l').describe('l', 'Log all output to file.')
   options.alias('n', 'new-window').boolean('n').describe('n', 'Open a new window.')
-  options.alias('s', 'spec-directory').string('s').describe('s', 'Set the spec directory (default: Atom\'s spec directory).')
+  options.alias('s', 'spec-directory').string('s').describe('s', 'Set the directory from which to run package specs (default: Atom\'s spec directory).')
   options.boolean('safe').describe('safe', 'Do not load packages from ~/.atom/packages or ~/.atom/dev/packages.')
   options.alias('t', 'test').boolean('t').describe('t', 'Run the specified specs and exit with error code on failures.')
   options.alias('v', 'version').boolean('v').describe('v', 'Print the version.')