diff --git a/g/encoding/gcompress/gcompress_test.go b/g/encoding/gcompress/gcompress_test.go
index 17829f8af..df1bbb6f3 100644
--- a/g/encoding/gcompress/gcompress_test.go
+++ b/g/encoding/gcompress/gcompress_test.go
@@ -6,23 +6,37 @@
 package gcompress_test
 
 import (
-	"github.com/gogf/gf/g/util/grand"
 	"github.com/gogf/gf/g/encoding/gcompress"
 	"github.com/gogf/gf/g/test/gtest"
 	"testing"
 )
 
-var times = 10
-var length = 2000
+func TestZlib(t *testing.T) {
+	gtest.Case(t, func() {
+		src := "hello, world\n"
+		dst := []byte{120, 156, 202, 72, 205, 201, 201, 215, 81, 40, 207, 47, 202, 73, 225, 2, 4, 0, 0, 255, 255, 33, 231, 4, 147}
+		gtest.Assert(gcompress.Zlib([]byte(src)), dst)
 
-func TestCompress(t *testing.T) {
-	for i := 0; i < times; i++ {
-		src := grand.RandStr(length + i * 10)
-		zlibVal := gcompress.Zlib([]byte(src))
-		dst := gcompress.UnZlib(zlibVal)
-		gtest.Assert(dst, []byte(src))
+		gtest.Assert(gcompress.UnZlib(dst), []byte(src))
+	})
 
-		dst1 := gcompress.UnGzip(gcompress.Gzip([]byte(src)))
-		gtest.Assert(dst1, []byte(src))
-	}
+}
+
+func TestGzip(t *testing.T) {
+	src := "Hello World!!"
+
+	gzip := []byte{
+		0x1f, 0x8b, 0x08, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0xff,
+		0xf2, 0x48, 0xcd, 0xc9, 0xc9,
+		0x57, 0x08, 0xcf, 0x2f, 0xca,
+		0x49, 0x51, 0x54, 0x04, 0x04,
+		0x00, 0x00, 0xff, 0xff, 0x9d,
+		0x24, 0xa8, 0xd1, 0x0d, 0x00,
+		0x00, 0x00,
+	}
+
+	gtest.Assert(gcompress.Gzip([]byte(src)), gzip)
+
+	gtest.Assert(gcompress.UnGzip(gzip), []byte(src))
 }