diff --git a/usage.go b/usage.go
index c13835e..db43dd1 100644
--- a/usage.go
+++ b/usage.go
@@ -163,9 +163,7 @@ func (p *Parser) writeHelpForCommand(w io.Writer, cmd *command) {
 	var globals []*spec
 	ancestor := cmd.parent
 	for ancestor != nil {
-		for _, spec := range ancestor.specs {
-			globals = append(globals, spec)
-		}
+		globals = append(globals, ancestor.specs...)
 		ancestor = ancestor.parent
 	}
 
diff --git a/usage_test.go b/usage_test.go
index 24846ae..31b439b 100644
--- a/usage_test.go
+++ b/usage_test.go
@@ -301,7 +301,7 @@ Global options:
 	p, err := NewParser(Config{}, &args)
 	require.NoError(t, err)
 
-	err = p.Parse([]string{"child", "nested", "value"})
+	_ = p.Parse([]string{"child", "nested", "value"})
 
 	var help bytes.Buffer
 	p.WriteHelp(&help)