diff --git a/cmd/breaker-cli/breaker.gohtml b/cmd/breaker-cli/breaker.gohtml
index a8d10f5..c6588d6 100644
--- a/cmd/breaker-cli/breaker.gohtml
+++ b/cmd/breaker-cli/breaker.gohtml
@@ -1,4 +1,5 @@
-// Code generated by "breaker-cli"; DO NOT EDIT.
+// Code generated by breaker-cli. DO NOT EDIT.
+// breaker-cli: https://github.com/chenyanchen/breaker/tree/main/cmd/breaker-cli
 
 {{$PackageName := .Name -}}
 package {{$PackageName}}
@@ -21,23 +22,24 @@ func New{{$StructName}}(source {{$PackageName}}.{{$InterfaceName}}) *{{$StructNa
 {{range .Implemented.Methods -}}
     {{$ErrorReturn := "" -}}
 func (b *{{$StructName}}) {{.Name}}({{range $i, $p := .Params}}{{.Name}} {{.Type}}, {{end}}) ({{range .Results}}{{.Type}}, {{end}}) {
-	{{/*	Find the error return	*/}}
-	{{- range .Results}}{{- if eq .Type "error" -}}{{$ErrorReturn = .Name}}{{end -}}{{- end -}}
+	{{/* Find the error return */}}
+	{{- range .Results}}{{if eq .Type "error"}}{{$ErrorReturn = .Name}}{{end}}{{end -}}
 
+	{{/* Return directly if there are no error return */}}
 	{{- if eq $ErrorReturn "" -}}
-	return b.source.{{.Name}}({{- range .Params}}{{if eq .Ellipsis true}}{{.Name}}...{{else}}{{.Name}},{{end}}{{end}})
+	return b.source.{{.Name}}({{range .Params}}{{if eq .Ellipsis true}}{{.Name}}...{{else}}{{.Name}},{{end}}{{end}})
 	{{- else -}}
 	var (
 		{{- range .Results}}
 		{{.Name}} {{.Type}}
 		{{- end}}
 	)
-	err := b.breaker.Do(func() error {
-		{{range $i, $r := .Results -}}{{- if $i -}},{{end}}{{.Name}}{{end}} = b.source.{{.Name}}({{range .Params}}{{if eq .Ellipsis true}}{{.Name}}...{{else}}{{.Name}},{{end}}{{end}})
+	{{$ErrorReturn}} = b.breaker.Do(func() error {
+		{{range $i, $r := .Results}}{{if $i}},{{end}}{{.Name}}{{end}} = b.source.{{.Name}}({{range .Params}}{{if eq .Ellipsis true}}{{.Name}}...{{else}}{{.Name}},{{end}}{{end}})
 		return {{$ErrorReturn}}
 	})
-	return {{range .Results}}{{if eq .Name $ErrorReturn }}err,{{else}}{{.Name}},{{end}}{{end}}
-	{{- end -}}
+	return {{range $i, $r :=.Results}}{{if $i}},{{end}}{{.Name}}{{end}}
+	{{- end}}
 }
 
 {{end -}}
diff --git a/cmd/breaker-cli/main.go b/cmd/breaker-cli/main.go
index 2d2c9b6..8e1a4de 100644
--- a/cmd/breaker-cli/main.go
+++ b/cmd/breaker-cli/main.go
@@ -235,8 +235,6 @@ func generate(ctx context.Context, pkg Package) (io.Reader, error) {
 		return nil, fmt.Errorf("execute template: %w", err)
 	}
 
-	// io.Copy(os.Stdout, buf)
-
 	data, err := imports.Process("", buf.Bytes(), nil)
 	if err != nil {
 		return nil, fmt.Errorf("goimports: %w", err)
diff --git a/cmd/breaker-cli/template.go b/cmd/breaker-cli/template.go
index f1aec85..67e258c 100644
--- a/cmd/breaker-cli/template.go
+++ b/cmd/breaker-cli/template.go
@@ -1,6 +1,7 @@
 package main
 
-const breakerTemplate = `// Code generated by "breaker-cli"; DO NOT EDIT.
+const breakerTemplate = `// Code generated by breaker-cli. DO NOT EDIT.
+// breaker-cli: https://github.com/chenyanchen/breaker/tree/main/cmd/breaker-cli
 
 {{$PackageName := .Name -}}
 package {{$PackageName}}
@@ -21,33 +22,26 @@ func New{{$StructName}}(source {{$PackageName}}.{{$InterfaceName}}) *{{$StructNa
 }
 
 {{range .Implemented.Methods -}}
-    {{$ErrorReturn := "nil" -}}
+    {{$ErrorReturn := "" -}}
 func (b *{{$StructName}}) {{.Name}}({{range $i, $p := .Params}}{{.Name}} {{.Type}}, {{end}}) ({{range .Results}}{{.Type}}, {{end}}) {
+	{{/* Find the error return */}}
+	{{- range .Results}}{{if eq .Type "error"}}{{$ErrorReturn = .Name}}{{end}}{{end -}}
+
+	{{/* Return directly if there are no error return */}}
+	{{- if eq $ErrorReturn "" -}}
+	return b.source.{{.Name}}({{range .Params}}{{if eq .Ellipsis true}}{{.Name}}...{{else}}{{.Name}},{{end}}{{end}})
+	{{- else -}}
 	var (
 		{{- range .Results}}
 		{{.Name}} {{.Type}}
 		{{- end}}
 	)
-	_ = b.breaker.Do(func() error {
-		{{range $i, $r := .Results -}}
-            {{- if $i -}}, {{end}}
-            {{- if eq .Type "error" -}}
-                {{$ErrorReturn = .Name}}
-                {{- .Name -}}
-            {{ else }}
-                {{- .Name -}}
-            {{ end }}
-        {{- end}} = b.source.{{.Name}}(
-	{{- range .Params -}}
-		{{- if eq .Ellipsis true -}}
-			{{- .Name -}}...
-		{{- else -}}
-			{{- .Name -}},
-		{{- end -}}
-	{{- end -}})
+	{{$ErrorReturn}} = b.breaker.Do(func() error {
+		{{range $i, $r := .Results}}{{if $i}},{{end}}{{.Name}}{{end}} = b.source.{{.Name}}({{range .Params}}{{if eq .Ellipsis true}}{{.Name}}...{{else}}{{.Name}},{{end}}{{end}})
 		return {{$ErrorReturn}}
 	})
-	return {{range $i, $r := .Results}}{{if $i}}, {{end}}{{.Name}}{{end}}
+	return {{range $i, $r :=.Results}}{{if $i}},{{end}}{{.Name}}{{end}}
+	{{- end}}
 }
 
 {{end -}}