diff --git a/doc/en/usage.txt b/doc/en/usage.txt
index eb8b0911c..de3a501f4 100644
--- a/doc/en/usage.txt
+++ b/doc/en/usage.txt
@@ -165,7 +165,7 @@ this acts as if you would call "py.test" from the command line.
 It will not raise ``SystemExit`` but return the exitcode instead.
 You can pass in options and arguments::
 
-    pytest.main(['x', 'mytestdir'])
+    pytest.main(['-x', 'mytestdir'])
 
 or pass in a string::
 
diff --git a/doc/ja/usage.txt b/doc/ja/usage.txt
index 84f93989f..a0dfe8f29 100644
--- a/doc/ja/usage.txt
+++ b/doc/ja/usage.txt
@@ -276,7 +276,7 @@ Python コードから直接 ``py.test`` を呼び出せます::
 
 これはコマンドラインから "py.test" を呼び出すように動作します。 ``SystemExit`` を発生させない代わりに終了コードを返します。次のようにオプションと引数を渡します::
 
-    pytest.main(['x', 'mytestdir'])
+    pytest.main(['-x', 'mytestdir'])
 
 ..
     or pass in a string::