Correct arg. test

base/changes.txt

@@ -6,7 +6,7 @@ to completeness or accuracy and it contains some references to files that are
 not part of the distribution.
 ================================================================================
 
-2025-01-04  Joseph Wright  <[email protected]>
+2025-01-12  Joseph Wright  <[email protected]>
 	* ltclass.dtx
 	Suppress load-only warning for options given globally
 

base/ltkeys.dtx

@@ -33,7 +33,7 @@
 %<*driver>
 % \fi
 \ProvidesFile{ltkeys.dtx}
-             [2025/01/04 v1.0p LaTeX Kernel (Keyval options)]
+             [2025/01/12 v1.0p LaTeX Kernel (Keyval options)]
 % \iffalse
 \documentclass{l3doc}
 \GetFileInfo{ltkeys.dtx}
@@ -576,7 +576,7 @@
 % \begin{macro}{\@@_options_loaded:n}
 % \begin{macro}{\@@_options_loaded:nn}
 % \changes{v1.0l}{2022/10/20}{Correct an argument for a message}
-% \changes{v1.0p}{2025-01-04}{Suppress load-only error for global options}
+% \changes{v1.0p}{2025-01-12}{Suppress load-only error for global options}
 %   Indicates that the load-time options for a package have been processed:
 %   once this has happened, make them unavailable either with a warning or
 %   an error. We suppress the warning where the option is in the global list:
@@ -589,7 +589,7 @@
       {
         \clist_map_inline:Nn \l_@@_tmpa_tl
           {
-            \clist_if_in:NnTF \l_@@_tmpb_tl {#1}
+            \clist_if_in:NnTF \l_@@_tmpb_tl {##1}
               { \keys_define:nn {#1} {##1 .code:n = } }
               {
                 \keys_define:nn {#1}

base/testfiles/github-1606.lvt

@@ -1,7 +1,10 @@
 \begin{filecontents*}[overwrite]{testpackage.sty}
 \ProvidesExplPackage{testpackage}{2025-02-04}{}{}
 \keys_define:nn { testpackage }
-  { testoption .code:n = { \def \testmacro { seen } } }
+  {
+    testoption .code:n = { \def \testmacro { seen } } ,
+    testoption .usage:n = { load }
+  }
 \ProcessKeyOptions [ testpackage ]
 \endinput
 \end{filecontents*}