diff --git a/g/crypto/gcrc32/gcrc32_test.go b/g/crypto/gcrc32/gcrc32_test.go
index 753e1c034..6472a7a01 100644
--- a/g/crypto/gcrc32/gcrc32_test.go
+++ b/g/crypto/gcrc32/gcrc32_test.go
@@ -11,9 +11,8 @@ package gcrc32_test
 import (
 	"testing"
 
-	"github.com/gogf/gf/g/crypto/gmd5"
-
 	"github.com/gogf/gf/g/crypto/gcrc32"
+	"github.com/gogf/gf/g/crypto/gmd5"
 	"github.com/gogf/gf/g/test/gtest"
 )
 
diff --git a/g/crypto/gmd5/gmd5.go b/g/crypto/gmd5/gmd5.go
index 26888db0a..1a9a56ea3 100644
--- a/g/crypto/gmd5/gmd5.go
+++ b/g/crypto/gmd5/gmd5.go
@@ -13,6 +13,7 @@ import (
 	"io"
 	"os"
 
+	"github.com/gogf/gf/g/internal/errors"
 	"github.com/gogf/gf/g/util/gconv"
 )
 
diff --git a/g/os/gcron/gcron_unit_1_test.go b/g/os/gcron/gcron_unit_1_test.go
index 59e3062ee..125fc2edc 100644
--- a/g/os/gcron/gcron_unit_1_test.go
+++ b/g/os/gcron/gcron_unit_1_test.go
@@ -7,11 +7,12 @@
 package gcron_test
 
 import (
+	"testing"
+	"time"
+
 	"github.com/gogf/gf/g/container/garray"
 	"github.com/gogf/gf/g/os/gcron"
 	"github.com/gogf/gf/g/test/gtest"
-	"testing"
-	"time"
 )
 
 func TestCron_Add_Close(t *testing.T) {
@@ -146,7 +147,7 @@ func TestCron_AddOnce2(t *testing.T) {
 			array.Append(1)
 		})
 		gtest.Assert(cron.Size(), 1)
-		time.Sleep(2500 * time.Millisecond)
+		time.Sleep(3000 * time.Millisecond)
 		gtest.Assert(array.Len(), 1)
 		gtest.Assert(cron.Size(), 0)
 	})