diff --git a/tests/python_client/milvus_client/test_milvus_client_alias.py b/tests/python_client/milvus_client/test_milvus_client_alias.py
index b156723fc1..84eef11252 100644
--- a/tests/python_client/milvus_client/test_milvus_client_alias.py
+++ b/tests/python_client/milvus_client/test_milvus_client_alias.py
@@ -31,6 +31,8 @@ default_bool_field_name = ct.default_bool_field_name
 default_string_field_name = ct.default_string_field_name
 default_int32_array_field_name = ct.default_int32_array_field_name
 default_string_array_field_name = ct.default_string_array_field_name
+default_schema = cf.gen_default_collection_schema()
+default_binary_schema = cf.gen_default_binary_collection_schema()
 
 
 class TestMilvusClientAliasInvalid(TestMilvusClientV2Base):
@@ -363,7 +365,171 @@ class TestMilvusClientAliasInvalid(TestMilvusClientV2Base):
                          check_task=CheckTasks.err_res, check_items=error)
         self.drop_alias(client, alias)
         self.drop_collection(client, collection_name)
+    
+    @pytest.mark.tags(CaseLabel.L1)
+    def test_milvus_client_alias_create_duplication_alias(self):
+        """
+        target: test two collections creating alias with same name
+        method: 
+                1.create a collection_1 with alias name alias_a
+                2.create a collection_2 also with alias name alias_a
+        expected: 
+                in step 2, creating alias with a duplication name is not allowed
+        """
+        # step 1: create collection with alias name
+        client = self._client()
+        collection_1 = cf.gen_collection_name_by_testcase_name(module_index=1)
+        alias_a = cf.gen_unique_str("collection_alias")
+        self.create_collection(client, collection_1, default_dim, consistency_level="Strong")
+        self.create_alias(client, collection_1, alias_a)
+        
+        # step 2: create a collection_2 also with alias name alias_a
+        collection_2 = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_2, default_dim, consistency_level="Strong")
+        error = {ct.err_code: 1602, ct.err_msg: f"{alias_a} is alias to another collection: {collection_1}: "
+                                                f"alias already exist[database=default][alias={alias_a}]"}
+        self.create_alias(client, collection_2, alias_a, 
+                          check_task=CheckTasks.err_res, 
+                          check_items=error)
+        self.drop_alias(client, alias_a)
+        self.drop_collection(client, collection_1)
+        self.drop_collection(client, collection_2)
+    
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_drop_same_alias_twice(self):
+        """
+        target: test drop same alias twice
+        method: 
+                1.create a collection with alias
+                2.collection drop alias
+                3.collection drop alias again
+        expected: drop alias succ
+        """
+        # step 1: create a collection with alias
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+        self.create_alias(client, collection_name, alias)
+        
+        # step 2: drop alias
+        self.drop_alias(client, alias)
+        
+        # step 3: drop alias again
+        self.drop_alias(client, alias)
+        self.drop_collection(client, collection_name)
+    
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_alias_create_dup_name_collection(self):
+        """
+        target: test creating a collection with a same name as alias, but a different schema
+        method:
+                1.create a collection with alias
+                2.create a collection with same name as alias, but a different schema
+        expected: in step 2, create collection failed
+        """
+        # step 1: create a collection with alias
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+        self.create_alias(client, collection_name, alias)
+        
+        # step 2: create a collection with same name as alias, but a different schema
+        error = {ct.err_code: 65535, 
+                 ct.err_msg: f"collection name [{alias}] conflicts with an existing alias, please choose a unique name"}
+        self.create_collection(client, alias, default_dim, 
+                               consistency_level="Strong",
+                               schema=default_schema,
+                               check_task=CheckTasks.err_res, 
+                               check_items=error)
+        self.drop_alias(client, alias)
+        self.drop_collection(client, collection_name)
 
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_alias_drop_collection_by_alias(self):
+        """
+        target: test dropping a collection by alias
+        method:
+                1.create a collection with alias
+                2.drop a collection by alias
+        expected: in step 2, drop collection by alias failed by design
+        """
+        # step 1: create a collection with alias
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+        self.create_alias(client, collection_name, alias)
+        
+        # step 2: drop collection by alias
+        error = {ct.err_code: 1600, ct.err_msg: f"cannot drop the collection via alias = {alias}"}
+        self.drop_collection(client, alias, check_task=CheckTasks.err_res, check_items=error)
+        self.drop_alias(client, alias)
+        self.drop_collection(client, collection_name)
+
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_alias_reuse_alias_name_from_dropped_collection(self):
+        """
+        target: test dropping a collection which has a alias
+        method:
+                1.create a collection
+                2.create an alias for the collection
+                3.drop the collection
+                4.create a new collection
+                5.create an alias with the same alias name for the new collection
+            expected: in step 5, create alias with the same name for the new collection succ
+        """
+        # step 1: create a collection
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+        
+        # step 2: create an alias for the collection
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_alias(client, collection_name, alias)
+        res, _ = self.list_aliases(client, collection_name)
+        assert len(res['aliases']) == 1
+
+        # step 3: drop the collection
+        self.drop_alias(client, alias)
+        res, _ = self.list_aliases(client, collection_name)
+        assert len(res['aliases']) == 0
+        self.drop_collection(client, collection_name)
+        
+        # step 4: create a new collection
+        collection_name_2 = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_name_2, default_dim, consistency_level="Strong")
+        
+        # step 5: create an alias with the same alias name for the new collection
+        self.create_alias(client, collection_name_2, alias)
+        res, _ = self.list_aliases(client, collection_name_2)
+        assert len(res['aliases']) == 1
+        self.drop_alias(client, alias)
+        self.drop_collection(client, collection_name_2)
+    
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_alias_rename_collection_to_alias_name(self):
+        """
+        target: test renaming a collection to a alias name
+        method:
+                1.create a collection
+                2.create an alias for the collection
+                3.rename the collection to the alias name
+        expected: in step 3, rename collection to alias name failed
+        """
+        # step 1: create a collection
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+
+        # step 2: create an alias for the collection
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_alias(client, collection_name, alias)
+        error = {ct.err_code: 65535, 
+                 ct.err_msg: f"cannot rename collection to an existing alias: {alias}"}
+        self.rename_collection(client, collection_name, alias, 
+                               check_task=CheckTasks.err_res, check_items=error)
 
 class TestMilvusClientAliasValid(TestMilvusClientV2Base):
     """ Test case of search interface """
@@ -498,6 +664,84 @@ class TestMilvusClientAliasValid(TestMilvusClientV2Base):
 class TestMilvusClientAliasOperation(TestMilvusClientV2Base):
     """ This is a migration test case for alias operation """
 
+    @pytest.fixture(scope="function", params=[False, True])
+    def auto_id(self, request):
+        yield request.param
+
+    @pytest.fixture(scope="function", params=["COSINE", "L2"])
+    def metric_type(self, request):
+        yield request.param
+
+    @pytest.mark.tags(CaseLabel.L0)
+    def test_milvus_client_alias_alter_operation_default(self):
+        """
+        target: test collection altering alias
+        method:
+                1. create collection_1, bind alias to collection_1 and insert 2000 entities
+                2. search on alias verify num_entities=2000
+                3. create collection_2 with 1500 entities
+                4. alter alias to collection_2 and search on alias
+                verify num_entities=1500
+        expected:
+                after step 2, collection_1 num_entities == alias num_entities == 2000
+                after step 3, collection_2 num_entities == alias num_entities == 1500
+        """
+        # step 1: create collection and create alias
+        client = self._client()
+        c_name1 = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, c_name1, default_dim, consistency_level="Strong")
+        
+        alias = cf.gen_unique_str("collection_alias")
+        # create a collection alias and bind to collection_1
+        self.create_alias(client, c_name1, alias)
+
+        # step 2: insert 2000 entities and search on alias
+        # default nb is 2000
+        c_info = self.describe_collection(client, c_name1)[0]
+        rows = cf.gen_row_data_by_schema(nb=default_nb, schema=c_info)
+        self.insert(client, c_name1, rows)
+
+        # pymilvus does not support num_entities yet, so we use query to check the number of entities
+        # assert self.num_entities(client, alias) == default_nb == self.num_entities(client, c_name1)
+        res1 = self.query(client, c_name1, filter=default_search_exp,
+                   check_task=CheckTasks.check_query_results,
+                   check_items={exp_res: rows,
+                                "with_vec": True,
+                                "pk_name": default_primary_key_field_name})[0]
+        res1_alias = self.query(client, alias, filter=default_search_exp,
+                   check_task=CheckTasks.check_query_results,
+                   check_items={exp_res: rows,
+                                "with_vec": True,
+                                "pk_name": default_primary_key_field_name})[0]
+        assert len(res1) == len(res1_alias) == default_nb
+
+        # step 3: create collection 2 with 1500 entities
+        nb2 = 1500
+        c_name2 = cf.gen_collection_name_by_testcase_name(module_index=2)
+        self.create_collection(client, c_name2, default_dim, consistency_level="Strong")
+        c_info2 = self.describe_collection(client, c_name2)[0]
+        rows = cf.gen_row_data_by_schema(nb=nb2, schema=c_info2)
+        self.insert(client, c_name2, rows)
+
+        # step 4: alter the collection alias to collection2
+        self.alter_alias(client, c_name2, alias)
+        #assert self.num_entities(client, alias) == nb2 == self.num_entities(client, c_name2)
+        res2 = self.query(client, c_name2, filter=default_search_exp,
+                   check_task=CheckTasks.check_query_results,
+                   check_items={exp_res: rows,
+                                "with_vec": True,
+                                "pk_name": default_primary_key_field_name})[0]
+        res2_alias = self.query(client, alias, filter=default_search_exp,
+                   check_task=CheckTasks.check_query_results,
+                   check_items={exp_res: rows,
+                                "with_vec": True,
+                                "pk_name": default_primary_key_field_name})[0]
+        assert len(res2) == len(res2_alias) == nb2
+
+        self.drop_alias(client, alias)
+        self.drop_collection(client, c_name1)
+        self.drop_collection(client, c_name2)
+
     @pytest.mark.tags(CaseLabel.L1)
     def test_milvus_client_alias_create_operation_default(self):
         """
@@ -507,24 +751,137 @@ class TestMilvusClientAliasOperation(TestMilvusClientV2Base):
                 2.collection create an alias, then init a collection with this alias but not create partitions
         expected: collection is equal to alias
         """
+        # step 1: create partitions and check the partition exists
         client = self._client()
-        collection_name = cf.gen_unique_str(prefix)
-
-        # Create the collection before creating partitions
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
         self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
 
-        # method 1: create partitions and check the partition exists
         for _ in range(10):
             partition_name = cf.gen_unique_str("partition")
             # create partition with different names and check the partition exists
             self.create_partition(client, collection_name, partition_name)
 
-        # method 2: create alias from collection, then init a collection with this alias but not create partitions
-        alias = cf.gen_unique_str(prefix)
+        # step 2: create alias from collection, then init a collection with this alias but not create partitions
+        alias = cf.gen_unique_str("collection_alias")
         self.create_alias(client, collection_name, alias)
         # assert collection is equal to alias according to partitions
         partition_name_list = self.list_partitions(client, collection_name)[0]
         partition_name_list_alias = self.list_partitions(client, alias)[0]
         assert partition_name_list == partition_name_list_alias
+
+        self.drop_alias(client, alias)
+        self.drop_collection(client, collection_name)
+
+    @pytest.mark.tags(CaseLabel.L1)
+    def test_milvus_client_alias_drop_operation_default(self):
+        """
+        target: test collection dropping alias
+        method:
+                1.create a collection with 10 partitions
+                2.collection create an alias
+                3.collection drop the alias
+        expected: 
+                after step 2, collection is equal to alias
+                after step 3, collection with alias name is not exist
+        """
+        # step 1: create collection with 10 partitions
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+
+        for _ in range(10):
+            partition_name = cf.gen_unique_str("partition")
+            self.create_partition(client, collection_name, partition_name)
+            assert self.has_partition(client, collection_name, partition_name)[0]
+
+        # step 2: create alias and drop the alias
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_alias(client, collection_name, alias)
+        collection_partitions = self.list_partitions(client, collection_name)[0]
+        alias_partitions = self.list_partitions(client, alias)[0]
+        assert collection_partitions == alias_partitions
+
+        # step 3: check the alias does not exist
+        self.drop_alias(client, alias)
+        error = {ct.err_code: 1600, ct.err_msg: f"alias not found[database=default][alias={alias}]"}
+        # check if error is raised, if raised, function is True and test passed, vise versa
+        self.describe_alias(client, alias, check_task=CheckTasks.err_res, check_items=error)
+        
+        self.drop_collection(client, collection_name)
+
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_alias_has_collection_partition(self):
+        """
+        target: test utility has collection by alias
+        method:
+                1.create collection with alias and partition
+                2.call has_collection function with alias as param 
+                3.call has_partition function with alias as param
+        expected: result is True
+        """
+        # step 1: create collection with alias and partition
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_alias(client, collection_name, alias)
+        partition_name = cf.gen_unique_str("partition")
+        self.create_partition(client, collection_name, partition_name)
+
+        # step 2: call has_collection function with alias as param and assert True
+        exists_a, _ = self.has_collection(client, alias)
+        assert exists_a
+        exists_p, _ = self.has_partition(client, alias, partition_name)
+        assert exists_p
+
+        self.drop_alias(client, alias)
+        self.drop_collection(client, collection_name)
+
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_alias_drop_collection(self):
+        """
+        target: test utility drop collection by alias
+        method:
+                1.create collection with alias
+                2.call drop_collection function with alias as param
+        expected: Got error: collection cannot be dropped via alias.
+        """
+        # step 1: create collection with alias
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_alias(client, collection_name, alias)
+
+        # step 2: call drop_collection function with alias as param and assert error
+        error = {ct.err_code: 1600, ct.err_msg: f"cannot drop the collection via alias = {alias}"}
+        # check if error is raised, if raised, function is True and test passed, vise versa
+        self.drop_collection(client, alias, check_task=CheckTasks.err_res, check_items=error)
+
+        self.drop_alias(client, alias)
+        self.drop_collection(client, collection_name)
+    
+    @pytest.mark.tags(CaseLabel.L2)
+    def test_milvus_client_alias_enable_mmap_by_alias(self):
+        """
+        target: test utility enable mmap by alias
+        method:
+                1.create collection with alias
+                2.call enable_mmap function with alias as param
+        expected: result is True
+        """
+        # step 1: create collection with alias
+        client = self._client()
+        collection_name = cf.gen_collection_name_by_testcase_name(module_index=1)
+        self.create_collection(client, collection_name, default_dim, consistency_level="Strong")
+        alias = cf.gen_unique_str("collection_alias")
+        self.create_alias(client, collection_name, alias)
+
+        # step 2: enable mmap via alias and verify
+        self.release_collection(client, collection_name)
+        self.alter_collection_properties(client, alias, properties={"mmap.enabled": True})
+        res = self.describe_collection(client, collection_name)[0].get("properties")
+        assert res["mmap.enabled"] == 'True'
+
         self.drop_alias(client, alias)
         self.drop_collection(client, collection_name)
\ No newline at end of file
diff --git a/tests/python_client/testcases/test_alias.py b/tests/python_client/testcases/test_alias.py
index 18e1766b54..dd5819b906 100644
--- a/tests/python_client/testcases/test_alias.py
+++ b/tests/python_client/testcases/test_alias.py
@@ -1,3 +1,7 @@
+##################################################################
+# All test cases in this file have been migrated to milvus_client#
+##################################################################
+'''
 import pytest
 import random
 
@@ -43,7 +47,6 @@ class TestAliasParamsInvalid(TestcaseBase):
                                        check_task=CheckTasks.err_res,
                                        check_items=error)
 
-
 class TestAliasOperation(TestcaseBase):
     """ Test cases of alias interface operations"""
 
@@ -100,9 +103,6 @@ class TestAliasOperation(TestcaseBase):
         res1 = collection_alias.query(expr="", output_fields=["count(*)"])[0]
         assert res1[0].get("count(*)") == nb2
 
-    #########################################################
-    # test_alias_create_operation_default() migrated to milvus_client
-    #########################################################
     @pytest.mark.tags(CaseLabel.L1)
     def test_alias_create_operation_default(self):
         """
@@ -280,7 +280,9 @@ class TestAliasOperation(TestcaseBase):
         pro = collection_alias.describe().get("properties")
         assert pro["mmap.enabled"] == 'False'
 
-
+##########################################################
+# class TestAliasOperationInvalid() has been migrated to milvus_client
+##########################################################
 class TestAliasOperationInvalid(TestcaseBase):
     """ Negative test cases of alias interface operations"""
 
@@ -484,3 +486,4 @@ class TestAliasOperationInvalid(TestcaseBase):
                  ct.err_msg: f"cannot rename collection to an existing alias: {alias_name}"}
         self.utility_wrap.rename_collection(collection_w.name, alias_name,
                                             check_task=CheckTasks.err_res, check_items=error)
+'''
\ No newline at end of file