diff --git a/app.go b/app.go
index fdcfda4a..7c10bc68 100644
--- a/app.go
+++ b/app.go
@@ -392,7 +392,7 @@ func (app *App) Listen(address interface{}, tlsconfig ...*tls.Config) error {
 	if !ok {
 		port, ok := address.(int)
 		if !ok {
-			return fmt.Errorf("Listen: Host must be an INT port or STRING address")
+			return fmt.Errorf("listen: host must be an `int` port or `string` address")
 		}
 		addr = strconv.Itoa(port)
 	}
@@ -437,7 +437,7 @@ func (app *App) Shutdown() error {
 	app.mutex.Lock()
 	defer app.mutex.Unlock()
 	if app.server == nil {
-		return fmt.Errorf("Server is not running")
+		return fmt.Errorf("shutdown: server is not running")
 	}
 	return app.server.Shutdown()
 }
@@ -477,7 +477,7 @@ func (app *App) Test(request *http.Request, msTimeout ...int) (*http.Response, e
 		select {
 		case err = <-channel:
 		case <-time.After(time.Duration(timeout) * time.Millisecond):
-			return nil, fmt.Errorf("Timeout error %vms", timeout)
+			return nil, fmt.Errorf("test: timeout error %vms", timeout)
 		}
 	} else {
 		// Without timeout
diff --git a/app_test.go b/app_test.go
index 935e7923..5457997b 100644
--- a/app_test.go
+++ b/app_test.go
@@ -43,7 +43,7 @@ func Test_App_ServerErrorHandler_SmallReadBuffer(t *testing.T) {
 	app := New()
 
 	app.Get("/", func(c *Ctx) {
-		panic(errors.New("Should never called"))
+		panic(errors.New("should never called"))
 	})
 
 	request := httptest.NewRequest("GET", "/", nil)
@@ -67,7 +67,7 @@ func Test_App_ErrorHandler(t *testing.T) {
 	app := New()
 
 	app.Get("/", func(c *Ctx) {
-		c.Next(errors.New("Hi, I'm an error!"))
+		c.Next(errors.New("hi, I'm an error"))
 	})
 
 	resp, err := app.Test(httptest.NewRequest("GET", "/", nil))
@@ -76,7 +76,7 @@ func Test_App_ErrorHandler(t *testing.T) {
 
 	body, err := ioutil.ReadAll(resp.Body)
 	utils.AssertEqual(t, nil, err)
-	utils.AssertEqual(t, "Hi, I'm an error!", string(body))
+	utils.AssertEqual(t, "hi, I'm an error!", string(body))
 
 }
 
@@ -88,7 +88,7 @@ func Test_App_ErrorHandler_Custom(t *testing.T) {
 	})
 
 	app.Get("/", func(c *Ctx) {
-		c.Next(errors.New("Hi, I'm an error!"))
+		c.Next(errors.New("hi, I'm an error"))
 	})
 
 	resp, err := app.Test(httptest.NewRequest("GET", "/", nil))
@@ -97,7 +97,7 @@ func Test_App_ErrorHandler_Custom(t *testing.T) {
 
 	body, err := ioutil.ReadAll(resp.Body)
 	utils.AssertEqual(t, nil, err)
-	utils.AssertEqual(t, "Hi, I'm an custom error!", string(body))
+	utils.AssertEqual(t, "hi, I'm an custom error!", string(body))
 }
 
 func Test_App_Nested_Params(t *testing.T) {
diff --git a/ctx.go b/ctx.go
index ea0fdf71..89917d3c 100644
--- a/ctx.go
+++ b/ctx.go
@@ -254,7 +254,7 @@ func (ctx *Ctx) BodyParser(out interface{}) error {
 		return schemaDecoderQuery.Decode(out, data)
 	}
 
-	return fmt.Errorf("BodyParser: cannot parse content-type: %v", ctype)
+	return fmt.Errorf("bodyparser: cannot parse content-type: %v", ctype)
 }
 
 // ClearCookie expires a specific cookie by key on the client side.
@@ -687,7 +687,7 @@ func (ctx *Ctx) Query(key string) (value string) {
 func (ctx *Ctx) Range(size int) (rangeData Range, err error) {
 	rangeStr := getString(ctx.Fasthttp.Request.Header.Peek(HeaderRange))
 	if rangeStr == "" || !strings.Contains(rangeStr, "=") {
-		return rangeData, fmt.Errorf("malformed range header string")
+		return rangeData, fmt.Errorf("range: malformed range header string")
 	}
 	data := strings.Split(rangeStr, "=")
 	rangeData.Type = data[0]
@@ -695,7 +695,7 @@ func (ctx *Ctx) Range(size int) (rangeData Range, err error) {
 	for i := 0; i < len(arr); i++ {
 		item := strings.Split(arr[i], "-")
 		if len(item) == 1 {
-			return rangeData, fmt.Errorf("malformed range header string")
+			return rangeData, fmt.Errorf("range: malformed range header string")
 		}
 		start, startErr := strconv.Atoi(item[0])
 		end, endErr := strconv.Atoi(item[1])
@@ -720,7 +720,7 @@ func (ctx *Ctx) Range(size int) (rangeData Range, err error) {
 		})
 	}
 	if len(rangeData.Ranges) < 1 {
-		return rangeData, fmt.Errorf("unsatisfiable range")
+		return rangeData, fmt.Errorf("range: unsatisfiable range")
 	}
 	return rangeData, nil
 }
@@ -865,7 +865,7 @@ func (ctx *Ctx) SendFile(file string, compress ...bool) error {
 	sendFileHandler(ctx.Fasthttp)
 	// Check for error
 	if status != 404 && ctx.Fasthttp.Response.StatusCode() == 404 {
-		return fmt.Errorf("file %s not found", file)
+		return fmt.Errorf("sendfile: file %s not found", file)
 	}
 	// Restore status code
 	ctx.Fasthttp.Response.SetStatusCode(status)
diff --git a/ctx_test.go b/ctx_test.go
index 1c777598..d2451fc1 100644
--- a/ctx_test.go
+++ b/ctx_test.go
@@ -568,7 +568,7 @@ func Benchmark_Ctx_Is(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		res = c.Is(".json")
+		_ = c.Is(".json")
 		res = c.Is("json")
 	}
 	utils.AssertEqual(b, true, res)
@@ -679,9 +679,9 @@ func Benchmark_Ctx_Params(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		res = c.Params("param1")
-		res = c.Params("param2")
-		res = c.Params("param3")
+		_ = c.Params("param1")
+		_ = c.Params("param2")
+		_ = c.Params("param3")
 		res = c.Params("param4")
 	}
 	utils.AssertEqual(b, "awesome", res)
diff --git a/middleware/compress.go b/middleware/compress.go
index 6ce0f0c1..88036405 100644
--- a/middleware/compress.go
+++ b/middleware/compress.go
@@ -24,7 +24,7 @@ const (
 	CompressLevelBestCompression = 2
 )
 
-// Default config
+// CompressConfigDefault is the default config
 var CompressConfigDefault = CompressConfig{
 	Next:  nil,
 	Level: CompressLevelDefault,
diff --git a/middleware/logger.go b/middleware/logger.go
index 510b41ff..19f3cf15 100644
--- a/middleware/logger.go
+++ b/middleware/logger.go
@@ -86,7 +86,7 @@ const (
 	LoggerTagCookie        = "cookie:"
 )
 
-// Default config
+// LoggerConfigDefault is the default config
 var LoggerConfigDefault = LoggerConfig{
 	Next:       nil,
 	Format:     "${time} ${method} ${path} - ${ip} - ${status} - ${latency}\n",
@@ -115,7 +115,7 @@ func LoggerWithConfig(config LoggerConfig) fiber.Handler {
 	tmpl.new(config.Format, "${", "}")
 
 	timestamp := time.Now().Format(config.TimeFormat)
-	// Update date/time every second in a seperate go routine
+	// Update date/time every second in a separate go routine
 	if strings.Contains(config.Format, "${time}") {
 		go func() {
 			for {
@@ -261,7 +261,7 @@ func (t *loggerTemplate) new(template, startTag, endTag string) {
 		s = s[n+len(a):]
 		n = bytes.Index(s, b)
 		if n < 0 {
-			panic(fmt.Errorf("Cannot find end tag=%q in the template=%q starting from %q", endTag, template, s))
+			panic(fmt.Errorf("cannot find end tag=%q in the template=%q starting from %q", endTag, template, s))
 		}
 
 		t.tags = append(t.tags, utils.GetString(s[:n]))
diff --git a/middleware/recover.go b/middleware/recover.go
index 52389631..b15a365d 100644
--- a/middleware/recover.go
+++ b/middleware/recover.go
@@ -15,7 +15,7 @@ type (
 	}
 )
 
-// RecoverConfigDefault config
+// RecoverConfigDefault is the default config
 var RecoverConfigDefault = RecoverConfig{
 	Next: nil,
 }
diff --git a/middleware/request_id.go b/middleware/request_id.go
index 70fbaf35..9ad83006 100644
--- a/middleware/request_id.go
+++ b/middleware/request_id.go
@@ -24,7 +24,7 @@ type (
 	}
 )
 
-// Default config
+// RequestIDConfigDefault is the default config
 var RequestIDConfigDefault = RequestIDConfig{
 	Next:   nil,
 	Header: fiber.HeaderXRequestID,
@@ -45,7 +45,7 @@ func RequestID(header ...string) fiber.Handler {
 	return RequestIDWithConfig(config)
 }
 
-// RequestID adds an UUID indentifier to the request
+// RequestIDWithConfig allows you to pass a custom config
 func RequestIDWithConfig(config RequestIDConfig) fiber.Handler {
 	// Set default values
 	if config.Header == "" {
diff --git a/router_test.go b/router_test.go
index 7295c640..8ee11ff1 100644
--- a/router_test.go
+++ b/router_test.go
@@ -16,7 +16,7 @@ import (
 	fasthttp "github.com/valyala/fasthttp"
 )
 
-var routesFixture = routeJson{}
+var routesFixture = routeJSON{}
 
 func init() {
 	dat, err := ioutil.ReadFile("./.github/fixture/testRoutes.json")
@@ -418,7 +418,7 @@ type testRoute struct {
 	Method string `json:"method"`
 	Path   string `json:"path"`
 }
-type routeJson struct {
+type routeJSON struct {
 	TestRoutes []testRoute `json:"testRoutes"`
 	GithubAPI  []testRoute `json:"githubAPI"`
 }
diff --git a/utils_test.go b/utils_test.go
index 6bcb48bf..d604acea 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -235,9 +235,9 @@ func Test_Utils_matchParams(t *testing.T) {
 func Benchmark_Utils_getGroupPath(b *testing.B) {
 	var res string
 	for n := 0; n < b.N; n++ {
-		res = getGroupPath("/v1/long/path/john/doe", "/why/this/name/is/so/awesome")
-		res = getGroupPath("/v1", "/")
-		res = getGroupPath("/v1", "/api")
+		_ = getGroupPath("/v1/long/path/john/doe", "/why/this/name/is/so/awesome")
+		_ = getGroupPath("/v1", "/")
+		_ = getGroupPath("/v1", "/api")
 		res = getGroupPath("/v1", "/api/register/:project")
 	}
 	utils.AssertEqual(b, "/v1/api/register/:project", res)