diff --git a/tests/integration/import/auto_id_test.go b/tests/integration/import/auto_id_test.go
index 3673ce0187..d907c71d7f 100644
--- a/tests/integration/import/auto_id_test.go
+++ b/tests/integration/import/auto_id_test.go
@@ -47,7 +47,7 @@ func (s *BulkInsertSuite) runTestAutoID() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 240*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert" + funcutil.RandomString(8)
 
 	var schema *schemapb.CollectionSchema
 	fieldSchema1 := &schemapb.FieldSchema{FieldID: 100, Name: "id", DataType: s.pkType, TypeParams: []*commonpb.KeyValuePair{{Key: common.MaxLengthKey, Value: "128"}}, IsPrimaryKey: true, AutoID: true}
diff --git a/tests/integration/import/binlog_test.go b/tests/integration/import/binlog_test.go
index cc3bb250e5..7dd398244c 100644
--- a/tests/integration/import/binlog_test.go
+++ b/tests/integration/import/binlog_test.go
@@ -62,7 +62,7 @@ func (s *BulkInsertSuite) PrepareSourceCollection(dim int, dmlGroup *DMLGroup) *
 	defer cancel()
 	c := s.Cluster
 
-	collectionName := "TestBinlogImport_A_" + funcutil.GenRandomStr()
+	collectionName := "TestBinlogImport_A_" + funcutil.RandomString(8)
 
 	schema := integration.ConstructSchemaOfVecDataTypeWithStruct(collectionName, dim, true)
 	marshaledSchema, err := proto.Marshal(schema)
@@ -297,7 +297,7 @@ func (s *BulkInsertSuite) runBinlogTest(dmlGroup *DMLGroup) {
 		return num
 	})
 
-	collectionName := "TestBinlogImport_B_" + funcutil.GenRandomStr()
+	collectionName := "TestBinlogImport_B_" + funcutil.RandomString(8)
 
 	schema := integration.ConstructSchema(collectionName, dim, true)
 	marshaledSchema, err := proto.Marshal(schema)
@@ -482,7 +482,7 @@ func (s *BulkInsertSuite) TestInvalidInput() {
 	c := s.Cluster
 	ctx := c.GetContext()
 
-	collectionName := "TestBinlogImport_InvalidInput_" + funcutil.GenRandomStr()
+	collectionName := "TestBinlogImport_InvalidInput_" + funcutil.RandomString(8)
 	schema := integration.ConstructSchema(collectionName, dim, true)
 	marshaledSchema, err := proto.Marshal(schema)
 	s.NoError(err)
diff --git a/tests/integration/import/dynamic_field_test.go b/tests/integration/import/dynamic_field_test.go
index ce02c931ed..873b4772a1 100644
--- a/tests/integration/import/dynamic_field_test.go
+++ b/tests/integration/import/dynamic_field_test.go
@@ -48,7 +48,7 @@ func (s *BulkInsertSuite) testImportDynamicField() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 240*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert_B_" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert_B_" + funcutil.RandomString(8)
 
 	schema := integration.ConstructSchema(collectionName, dim, true, &schemapb.FieldSchema{
 		FieldID:      100,
diff --git a/tests/integration/import/import_test.go b/tests/integration/import/import_test.go
index a72f6a6265..36014c3588 100644
--- a/tests/integration/import/import_test.go
+++ b/tests/integration/import/import_test.go
@@ -81,7 +81,7 @@ func (s *BulkInsertSuite) run() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 240*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert" + funcutil.RandomString(8)
 
 	var schema *schemapb.CollectionSchema
 	fieldSchema1 := &schemapb.FieldSchema{FieldID: 100, Name: "id", DataType: s.pkType, TypeParams: []*commonpb.KeyValuePair{{Key: common.MaxLengthKey, Value: "128"}}, IsPrimaryKey: true, AutoID: false}
@@ -288,7 +288,7 @@ func (s *BulkInsertSuite) TestZeroRowCount() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 60*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert_" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert_" + funcutil.RandomString(8)
 
 	schema := integration.ConstructSchema(collectionName, dim, true,
 		&schemapb.FieldSchema{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true, AutoID: true},
diff --git a/tests/integration/import/multi_vector_test.go b/tests/integration/import/multi_vector_test.go
index e38e9a9cb3..db852bd114 100644
--- a/tests/integration/import/multi_vector_test.go
+++ b/tests/integration/import/multi_vector_test.go
@@ -50,7 +50,7 @@ func (s *BulkInsertSuite) testMultipleVectorFields() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 600*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert_MultipleVectorFields_" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert_MultipleVectorFields_" + funcutil.RandomString(8)
 
 	schema := integration.ConstructSchema(collectionName, 0, true, &schemapb.FieldSchema{
 		FieldID:      100,
diff --git a/tests/integration/import/partition_key_test.go b/tests/integration/import/partition_key_test.go
index d7e3a15cbb..9029fb3f37 100644
--- a/tests/integration/import/partition_key_test.go
+++ b/tests/integration/import/partition_key_test.go
@@ -48,7 +48,7 @@ func (s *BulkInsertSuite) TestImportWithPartitionKey() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 240*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert_WithPartitionKey_" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert_WithPartitionKey_" + funcutil.RandomString(8)
 
 	schema := integration.ConstructSchema(collectionName, dim, true, &schemapb.FieldSchema{
 		FieldID:      100,
@@ -218,7 +218,7 @@ func (s *BulkInsertSuite) TestImportWithAFewRows() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 240*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert_WithPartitionKey_" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert_WithPartitionKey_" + funcutil.RandomString(8)
 
 	schema := integration.ConstructSchema(collectionName, dim, true, &schemapb.FieldSchema{
 		FieldID:      100,
diff --git a/tests/integration/import/vector_array_test.go b/tests/integration/import/vector_array_test.go
index f25ba6bb13..c987af8271 100644
--- a/tests/integration/import/vector_array_test.go
+++ b/tests/integration/import/vector_array_test.go
@@ -47,7 +47,7 @@ func TestGenerateJsonFileWithVectorArray(t *testing.T) {
 		maxArrayCapacity = 10
 	)
 
-	collectionName := "TestBulkInsert_VectorArray_" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert_VectorArray_" + funcutil.RandomString(8)
 
 	// Create schema with StructArrayField containing vector array
 	schema := integration.ConstructSchema(collectionName, 0, true, &schemapb.FieldSchema{
@@ -127,7 +127,7 @@ func (s *BulkInsertSuite) runForStructArray() {
 	ctx, cancel := context.WithTimeout(c.GetContext(), 600*time.Second)
 	defer cancel()
 
-	collectionName := "TestBulkInsert_VectorArray_" + funcutil.GenRandomStr()
+	collectionName := "TestBulkInsert_VectorArray_" + funcutil.RandomString(8)
 
 	// Create schema with StructArrayField containing vector array
 	schema := integration.ConstructSchema(collectionName, 0, true, &schemapb.FieldSchema{