diff --git a/strutil/random_test.go b/strutil/random_test.go
index 052ddb47a..8e74f37a9 100644
--- a/strutil/random_test.go
+++ b/strutil/random_test.go
@@ -4,7 +4,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"math/rand"
-	"runtime"
 	"testing"
 	"time"
 
@@ -27,12 +26,9 @@ func TestRandomCharsV2(t *testing.T) {
 		fmt.Println(str)
 		assert.Len(t, str, 6)
 		keyMp[str] = true
+		time.Sleep(time.Microsecond * 10)
 	}
 
-	if runtime.GOOS == "windows" {
-		t.Skip("skip test unique on windows")
-		return
-	}
 	assert.Len(t, keyMp, 10)
 }
 
@@ -45,12 +41,9 @@ func TestRandomCharsV2_issues121(t *testing.T) {
 		fmt.Println(str)
 		assert.Len(t, str, 32)
 		keyMp[str] = true
+		time.Sleep(time.Microsecond * 10)
 	}
 
-	if runtime.GOOS == "windows" {
-		t.Skip("skip test unique on windows")
-		return
-	}
 	assert.Len(t, keyMp, 10)
 }
 
@@ -63,12 +56,9 @@ func TestRandomCharsV3(t *testing.T) {
 		fmt.Println(str)
 		assert.Len(t, str, 4)
 		keyMp[str] = true
+		time.Sleep(time.Microsecond * 10)
 	}
 
-	if runtime.GOOS == "windows" {
-		t.Skip("skip test unique on windows")
-		return
-	}
 	assert.Len(t, keyMp, size)
 }
 
@@ -81,15 +71,12 @@ func TestRandWithTpl(t *testing.T) {
 		fmt.Println(str)
 		assert.Len(t, str, 4)
 		keyMp[str] = true
+		time.Sleep(time.Microsecond * 10)
 	}
 
 	assert.NotEmpty(t, strutil.RandWithTpl(8, ""))
 	assert.NotEmpty(t, strutil.RandWithTpl(8, strutil.AlphaBet1))
 
-	if runtime.GOOS == "windows" {
-		t.Skip("skip test unique on windows")
-		return
-	}
 	assert.Len(t, keyMp, size)
 }