diff --git a/flags/flags.go b/flags/flags.go
index 4ac0374..3febbc6 100644
--- a/flags/flags.go
+++ b/flags/flags.go
@@ -154,9 +154,8 @@ func expandOpts(opts any) []Flag {
 	return flags
 }
 
-// assign values of args to opts struct using Flag interface methods
-func ParseArgs(sub cmd.Subcommand, summary string, args []string, opts any) {
-	flags := expandOpts(opts)
+// internal for type safety testing
+func parseArgsInternal(sub cmd.Subcommand, summary string, args []string, opts any, flags []Flag) {
 argloop:
 	for i := 0; i < len(args); i++ {
 		arg := args[i]
@@ -178,3 +177,9 @@ argloop:
 		Help(sub, summary, opts)
 	}
 }
+
+// assign values of args to opts struct using Flag interface methods
+func ParseArgs(sub cmd.Subcommand, summary string, args []string, opts any) {
+	flags := expandOpts(opts)
+	parseArgsInternal(sub, summary, args, opts, flags)
+}