diff --git a/Lib/cmd.py b/Lib/cmd.py
index ae7f12e..05ba7e3 100644
--- a/Lib/cmd.py
+++ b/Lib/cmd.py
@@ -294,6 +294,7 @@
         return list(commands | topics)
 
     def do_help(self, arg):
+        'List available commands with "help" or detailed help with "help cmd".'
         if arg:
             # XXX check arg syntax
             try:
diff --git a/Lib/test/test_cmd.py b/Lib/test/test_cmd.py
index 8bb4e63..ed9258b 100644
--- a/Lib/test/test_cmd.py
+++ b/Lib/test/test_cmd.py
@@ -84,11 +84,11 @@
     <BLANKLINE>
     Documented commands (type help <topic>):
     ========================================
-    add
+    add  help
     <BLANKLINE>
     Undocumented commands:
     ======================
-    exit  help  shell
+    exit  shell
     <BLANKLINE>
 
     Test for the function print_topics():
@@ -125,11 +125,11 @@
     <BLANKLINE>
     Documented commands (type help <topic>):
     ========================================
-    add
+    add  help
     <BLANKLINE>
     Undocumented commands:
     ======================
-    exit  help  shell
+    exit  shell
     <BLANKLINE>
     help text for add
     Hello from postloop