diff --git a/tests/python_client/testcases/test_database.py b/tests/python_client/testcases/test_database.py
index f4fe890abb443..0b4dea6d46426 100644
--- a/tests/python_client/testcases/test_database.py
+++ b/tests/python_client/testcases/test_database.py
@@ -1,7 +1,6 @@
 import pytest
 
 from base.client_base import TestcaseBase
-from base.collection_wrapper import ApiCollectionWrapper
 from common.common_type import CheckTasks, CaseLabel
 from common import common_func as cf
 from common import common_type as ct
@@ -19,6 +18,7 @@ def teardown_method(self, method):
         teardown method: drop collection and db
         """
         log.info("[database_teardown_method] Start teardown database test cases ...")
+        self._connect()
 
         # clear db
         for db in self.database_wrap.list_database()[0]:
@@ -28,9 +28,7 @@ def teardown_method(self, method):
             # drop db collections
             colls, _ = self.utility_wrap.list_collections()
             for coll in colls:
-                cw = ApiCollectionWrapper()
-                cw.init_collection(coll)
-                cw.drop()
+                self.utility_wrap.drop_collection(coll)
 
             # drop db
             if db != ct.default_db:
@@ -182,7 +180,7 @@ def test_list_db_with_invalid_timeout(self, timeout):
         # list db with not existed using
         self.database_wrap.list_database(timeout=timeout, check_task=CheckTasks.err_res,
                                          check_items={ct.err_code: 1,
-                                                      ct.err_msg: "rpc deadline exceeded: Retry timeout"})
+                                                      ct.err_msg: "StatusCode.DEADLINE_EXCEEDED"})
 
     @pytest.mark.parametrize("invalid_db_name", [(), [], 1, [1, "2", 3], (1,), {1: 1}])
     def test_using_invalid_db(self, invalid_db_name):
@@ -206,9 +204,9 @@ def test_using_invalid_db(self, invalid_db_name):
         assert collection_w.name in collections
 
     @pytest.mark.parametrize("invalid_db_name", ["12-s", "12 s", "(mn)", "中文", "%$#"])
-    def test_using_invalid_db_2(self, host, port, invalid_db_name):
+    def test_using_invalid_db_2(self, invalid_db_name):
         # connect with default alias using
-        self.connection_wrap.connect(host=host, port=port, user=ct.default_user, password=ct.default_password)
+        self._connect()
 
         # create collection in default db
         collection_w = self.init_collection_wrap(name=cf.gen_unique_str(prefix))
@@ -226,7 +224,7 @@ def teardown_method(self, method):
         teardown method: drop collection and db
         """
         log.info("[database_teardown_method] Start teardown database test cases ...")
-
+        self._connect()
         # clear db
         for db in self.database_wrap.list_database()[0]:
             # using db
@@ -235,9 +233,7 @@ def teardown_method(self, method):
             # drop db collections
             colls, _ = self.utility_wrap.list_collections()
             for coll in colls:
-                cw = ApiCollectionWrapper()
-                cw.init_collection(coll)
-                cw.drop()
+                self.utility_wrap.drop_collection(coll)
 
             # drop db
             if db != ct.default_db:
@@ -507,14 +503,14 @@ def test_drop_using_db(self):
         using_collections, _ = self.utility_wrap.list_collections()
         assert collection_w_default.name in using_collections
 
-    def test_using_db_not_existed(self, host, port):
+    def test_using_db_not_existed(self):
         """
         target: test using a not existed db
         method: using a not existed db
         expected: exception
         """
         # create db
-        self.connection_wrap.connect(host=host, port=port, user=ct.default_user, password=ct.default_password)
+        self._connect()
         collection_w = self.init_collection_wrap(cf.gen_unique_str(prefix))
 
         # list collection with not exist using db -> exception
@@ -547,9 +543,7 @@ def teardown_method(self, method):
             # drop db collections
             colls, _ = self.utility_wrap.list_collections()
             for coll in colls:
-                cw = ApiCollectionWrapper()
-                cw.init_collection(coll)
-                cw.drop()
+                self.utility_wrap.drop_collection(coll)
 
             # drop db
             if db != ct.default_db: