diff --git a/nselib/unittest.lua b/nselib/unittest.lua
index d07ab8c0a..58abca44d 100644
--- a/nselib/unittest.lua
+++ b/nselib/unittest.lua
@@ -15,9 +15,6 @@
 --
 -- The library is driven by the unittest NSE script.
 --
--- @args unittest.run Run tests. Causes <code>unittest.testing()</code> to
---                    return true.
---
 -- @copyright Same as Nmap--See http://nmap.org/book/man-legal.html
 
 local stdnse = require "stdnse"
@@ -143,7 +140,8 @@ local am_testing = stdnse.get_script_args('unittest.run')
 ---Check whether tests are being run
 --
 -- Libraries can use this function to avoid the overhead of creating tests if
--- the user hasn't chosen to run them.
+-- the user hasn't chosen to run them. Unittesting is turned on with the
+-- <code>unittest.run</code> script-arg.
 -- @return true if unittests are being run, false otherwise.
 function testing()
   return am_testing
diff --git a/scripts/unittest.nse b/scripts/unittest.nse
index 242e79ba1..a009e8950 100644
--- a/scripts/unittest.nse
+++ b/scripts/unittest.nse
@@ -6,6 +6,9 @@ Runs unit tests on all NSE libraries.
 ]]
 
 ---
+-- @args unittest.run Run tests. Causes <code>unittest.testing()</code> to
+--                    return true.
+--
 -- @args unittest.tests Run tests from only these libraries (defaults to all)
 --
 -- @usage