diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index ef1b5c5c6d..5130b05f24 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -8,9 +8,12 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v2
-    - name: GolangCI-Lint Action
-      uses: golangci/golangci-lint-action@v2
+    - uses: actions/checkout@v2
+    - uses: actions/setup-go@v2
+      with:
+        go-version: 1.17.x
+    - run: go version
+    - run: diff -u <(echo -n) <(gofmt -d .)
+    - uses: golangci/golangci-lint-action@v2
       with:
         version: v1.28.3
diff --git a/bytesconv.go b/bytesconv.go
index 79896e86a0..374092a30f 100644
--- a/bytesconv.go
+++ b/bytesconv.go
@@ -11,11 +11,11 @@ import (
 	"math"
 	"net"
 	"reflect"
+	"runtime"
 	"strings"
 	"sync"
 	"time"
 	"unsafe"
-	"runtime"
 )
 
 // AppendHTMLEscape appends html-escaped s to dst and returns the extended dst.
diff --git a/header.go b/header.go
index 73e98449d2..f15ef371c8 100644
--- a/header.go
+++ b/header.go
@@ -271,11 +271,11 @@ func (h *RequestHeader) SetContentLength(contentLength int) {
 func (h *ResponseHeader) isCompressibleContentType() bool {
 	contentType := h.ContentType()
 	return bytes.HasPrefix(contentType, strTextSlash) ||
-			bytes.HasPrefix(contentType, strApplicationSlash) ||
-			bytes.HasPrefix(contentType, strImageSVG) ||
-			bytes.HasPrefix(contentType, strImageIcon) ||
-			bytes.HasPrefix(contentType, strFontSlash) ||
-			bytes.HasPrefix(contentType, strMultipartSlash)
+		bytes.HasPrefix(contentType, strApplicationSlash) ||
+		bytes.HasPrefix(contentType, strImageSVG) ||
+		bytes.HasPrefix(contentType, strImageIcon) ||
+		bytes.HasPrefix(contentType, strFontSlash) ||
+		bytes.HasPrefix(contentType, strMultipartSlash)
 }
 
 // ContentType returns Content-Type header value.
diff --git a/strings.go b/strings.go
index 7f12cbc676..e28eaac262 100644
--- a/strings.go
+++ b/strings.go
@@ -73,10 +73,10 @@ var (
 	strBytes               = []byte("bytes")
 	strBasicSpace          = []byte("Basic ")
 
-	strApplicationSlash    = []byte("application/")
-	strImageSVG            = []byte("image/svg")
-	strImageIcon           = []byte("image/x-icon")
-	strFontSlash           = []byte("font/")
-	strMultipartSlash      = []byte("multipart/")
-	strTextSlash           = []byte("text/")
+	strApplicationSlash = []byte("application/")
+	strImageSVG         = []byte("image/svg")
+	strImageIcon        = []byte("image/x-icon")
+	strFontSlash        = []byte("font/")
+	strMultipartSlash   = []byte("multipart/")
+	strTextSlash        = []byte("text/")
 )