diff --git a/server/middleware/caching/caching_revalidate.go b/server/middleware/caching/caching_revalidate.go
index 0645164..107a503 100644
--- a/server/middleware/caching/caching_revalidate.go
+++ b/server/middleware/caching/caching_revalidate.go
@@ -123,6 +123,7 @@ func (r *RevalidateProcessor) Lookup(c *Caching, req *http.Request) (bool, error
 	c.cacheStatus = storagev1.CacheMiss
 
 	// drop metadata
+	c.md.Chunks.Clear()
 	if discardErr := c.bucket.DiscardWithMessage(req.Context(), c.id, "revalidate cache with expired"); discardErr != nil {
 		c.log.Errorf("cache revalidate storage error when discarding of object's data: %s, err: %s",
 			c.id.Key(), discardErr)
@@ -152,6 +153,7 @@ func (r *RevalidateProcessor) PreRequest(c *Caching, req *http.Request) (*http.R
 
 		if !conditionHeader {
 			c.log.Warnf("refresh error while get 'Etag' & 'Last-Modified' is nil, delete cache do proxy")
+			c.md.Chunks.Clear()
 			_ = c.bucket.DiscardWithMessage(req.Context(), c.id, "refresh cache no condition header")
 			return req, nil
 		}
@@ -177,6 +179,7 @@ func (r *RevalidateProcessor) revalidate(c *Caching, resp *http.Response, req *h
 	if resp.StatusCode != http.StatusNotModified {
 		c.cacheStatus = storagev1.CacheRevalidateMiss
 		c.setXCache(resp)
+		c.md.Chunks.Clear()
 		_ = c.bucket.DiscardWithMessage(req.Context(), c.id, "revalidate cache not StatusNotModified")
 		return resp, nil
 	}
@@ -216,13 +219,15 @@ func (r *RevalidateProcessor) freshness(c *Caching, resp *http.Response) bool {
 	metadata.RespUnix = now.Unix()
 	metadata.LastRefUnix = now.Unix()
 
-	cloneHeaders := []string{"Last-Modified", "ETag", "Cache-Control"}
-	for _, name := range cloneHeaders {
-		value := resp.Header.Get(name)
-		if value != "" {
-			metadata.Headers.Set(name, value)
-		}
-	}
+	xhttp.CopyHeader(metadata.Headers, resp.Header)
+
+	// cloneHeaders := []string{"Last-Modified", "ETag", "Cache-Control"}
+	// for _, name := range cloneHeaders {
+	// 	value := resp.Header.Get(name)
+	// 	if value != "" {
+	// 		metadata.Headers.Set(name, value)
+	// 	}
+	// }
 	c.cacheable = true
 	c.md = metadata
 
diff --git a/tests/all-features/caching/revalidate_test.go b/tests/all-features/caching/revalidate_test.go
new file mode 100644
index 0000000..aca41c0
--- /dev/null
+++ b/tests/all-features/caching/revalidate_test.go
@@ -0,0 +1,88 @@
+package caching
+
+import (
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/omalloc/tavern/pkg/e2e"
+	xhttp "github.com/omalloc/tavern/pkg/x/http"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRevalidateDiscard(t *testing.T) {
+	f := e2e.GenFile(t, 5<<20)
+
+	t.Run("test Revalidate old-file", func(t *testing.T) {
+		case1 := e2e.New("http://sendya.me.gslb.com/cases/revalidate/file1.apk", e2e.RespCallbackFile(f, func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("X-Case", "old-file")
+			w.Header().Set("Cache-Control", "max-age=1") // 1s 过滤
+		}))
+		defer case1.Close()
+
+		rr := xhttp.NewRequestRange(0, 524287)
+
+		resp, err := case1.Do(func(r *http.Request) {
+			r.Header.Set("Range", rr.String())
+			t.Logf("New Request Range=%s", rr.String())
+		})
+
+		t.Logf("resp size=%d", resp.ContentLength)
+		t.Logf("file offset=%d, end=%d", rr.Start, rr.End)
+		t.Logf("file path=%s", f.Path)
+
+		hashBody := e2e.HashBody(resp)
+		hashFile := e2e.HashFile(f.Path, int(rr.Start), int(rr.End-rr.Start+1))
+
+		assert.NoError(t, err, "response should not error")
+
+		assert.Equal(t, http.StatusPartialContent, resp.StatusCode, "response should be code 206")
+
+		assert.Equal(t, rr.ContentRange(uint64(f.Size)), resp.Header.Get("Content-Range"), "response should be Content-Range")
+
+		assert.Equal(t, "old-file", resp.Header.Get("X-Case"), "response should be X-Case old-file")
+
+		assert.Equal(t, f.MD5, resp.Header.Get("ETag"), "response should be ETag")
+
+		assert.Equal(t, hashBody, hashFile, "response body should be equal to file MD5")
+	})
+
+	t.Run("test Revalidate new-file", func(t *testing.T) {
+		time.Sleep(time.Second)
+
+		case1 := e2e.New("http://sendya.me.gslb.com/cases/revalidate/file1.apk", e2e.RespCallbackFile(f, func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("X-Case", "new-file")
+			w.Header().Set("Cache-Control", "max-age=1") // 1s 过滤
+		}))
+		defer case1.Close()
+
+		rr := xhttp.NewRequestRange(2097152, 3145727)
+
+		resp, err := case1.Do(func(r *http.Request) {
+			r.Header.Set("Range", rr.String())
+			t.Logf("New Request Range=%s", rr.String())
+		})
+		t.Logf("resp size=%d", resp.ContentLength)
+		t.Logf("file offset=%d, end=%d", rr.Start, rr.End)
+		t.Logf("file path=%s", f.Path)
+
+		hashBody := e2e.HashBody(resp)
+		hashFile := e2e.HashFile(f.Path, int(rr.Start), int(rr.End-rr.Start+1))
+
+		assert.NoError(t, err, "response should not error")
+
+		assert.Equal(t, http.StatusPartialContent, resp.StatusCode, "response should be code 206")
+
+		assert.Equal(t, rr.ContentRange(uint64(f.Size)), resp.Header.Get("Content-Range"), "response should be Content-Range")
+
+		assert.Equal(t, "new-file", resp.Header.Get("X-Case"), "response should be X-Case new-file")
+
+		assert.Equal(t, f.MD5, resp.Header.Get("ETag"), "response should be ETag")
+
+		assert.Equal(t, hashBody, hashFile, "response body should be equal to file MD5")
+	})
+
+	// t.Run("PURGE", func(t *testing.T) {
+	// 	e2e.Purge(t, "http://sendya.me.gslb.com/cases/revalidate/file1.apk")
+	// })
+}
diff --git a/tests/config.test.yaml b/tests/config.test.yaml
index 2490eb9..3970bd5 100644
--- a/tests/config.test.yaml
+++ b/tests/config.test.yaml
@@ -60,7 +60,7 @@ server:
       secret: "123"
     path: ./logs/access.log
 plugin:
-  - name: example-plugin
+  - name: qs-plugin
     options:
       option1: value1
       option2: 2