diff --git a/cmd/swag/main.go b/cmd/swag/main.go
index b6805c786..d31658364 100644
--- a/cmd/swag/main.go
+++ b/cmd/swag/main.go
@@ -143,7 +143,7 @@ func initAction(ctx *cli.Context) error {
 	if len(outputTypes) == 0 {
 		return fmt.Errorf("no output types specified")
 	}
-	var logger swag.Debugger
+	logger := log.New(os.Stdout, "", log.LstdFlags)
 	if ctx.Bool(quietFlag) {
 		logger = log.New(ioutil.Discard, "", log.LstdFlags)
 	}
diff --git a/gen/gen.go b/gen/gen.go
index b85290b4f..a427fb314 100644
--- a/gen/gen.go
+++ b/gen/gen.go
@@ -33,6 +33,12 @@ type Gen struct {
 	jsonIndent    func(data interface{}) ([]byte, error)
 	jsonToYAML    func(data []byte) ([]byte, error)
 	outputTypeMap map[string]genTypeWriter
+	debug         Debugger
+}
+
+// Debugger is the interface that wraps the basic Printf method.
+type Debugger interface {
+	Printf(format string, v ...interface{})
 }
 
 // New creates a new Gen.
@@ -43,6 +49,7 @@ func New() *Gen {
 			return json.MarshalIndent(data, "", "    ")
 		},
 		jsonToYAML: yaml.JSONToYAML,
+		debug:      log.New(os.Stdout, "", log.LstdFlags),
 	}
 
 	gen.outputTypeMap = map[string]genTypeWriter{
@@ -117,6 +124,9 @@ type Config struct {
 
 // Build builds swagger json file  for given searchDir and mainAPIFile. Returns json.
 func (g *Gen) Build(config *Config) error {
+	if config.Debugger != nil {
+		g.debug = config.Debugger
+	}
 	if config.InstanceName == "" {
 		config.InstanceName = swag.Name
 	}
@@ -138,7 +148,7 @@ func (g *Gen) Build(config *Config) error {
 				return fmt.Errorf("could not open overrides file: %w", err)
 			}
 		} else {
-			log.Printf("Using overrides from %s", config.OverridesFile)
+			g.debug.Printf("Using overrides from %s", config.OverridesFile)
 
 			overrides, err = parseOverrides(overridesFile)
 			if err != nil {
@@ -147,7 +157,7 @@ func (g *Gen) Build(config *Config) error {
 		}
 	}
 
-	log.Println("Generate swagger docs....")
+	g.debug.Printf("Generate swagger docs....")
 
 	p := swag.New(swag.SetMarkdownFileDirectory(config.MarkdownFilesDir),
 		swag.SetDebugger(config.Debugger),
@@ -216,7 +226,7 @@ func (g *Gen) writeDocSwagger(config *Config, swagger *spec.Swagger) error {
 		return err
 	}
 
-	log.Printf("create docs.go at  %+v", docFileName)
+	g.debug.Printf("create docs.go at  %+v", docFileName)
 
 	return nil
 }
@@ -240,7 +250,7 @@ func (g *Gen) writeJSONSwagger(config *Config, swagger *spec.Swagger) error {
 		return err
 	}
 
-	log.Printf("create swagger.json at  %+v", jsonFileName)
+	g.debug.Printf("create swagger.json at  %+v", jsonFileName)
 
 	return nil
 }
@@ -269,7 +279,7 @@ func (g *Gen) writeYAMLSwagger(config *Config, swagger *spec.Swagger) error {
 		return err
 	}
 
-	log.Printf("create swagger.yaml at  %+v", yamlFileName)
+	g.debug.Printf("create swagger.yaml at  %+v", yamlFileName)
 
 	return nil
 }