diff --git a/tests/python_client/requirements.txt b/tests/python_client/requirements.txt
index 5812043a98..3bd8166898 100644
--- a/tests/python_client/requirements.txt
+++ b/tests/python_client/requirements.txt
@@ -27,8 +27,8 @@ pytest-parallel
 pytest-random-order
 
 # pymilvus
-pymilvus==2.5.0rc121
-pymilvus[bulk_writer]==2.5.0rc121
+pymilvus==2.5.1rc4
+pymilvus[bulk_writer]==2.5.1rc4
 
 
 # for customize config test
diff --git a/tests/python_client/testcases/test_insert.py b/tests/python_client/testcases/test_insert.py
index 45d00e3334..ac64dd38d1 100644
--- a/tests/python_client/testcases/test_insert.py
+++ b/tests/python_client/testcases/test_insert.py
@@ -1259,7 +1259,7 @@ class TestInsertInvalid(TestcaseBase):
                 elif data[i][dirty_i].__class__ is str:
                     tmp = data[i][dirty_i]
                     data[i][dirty_i] = random.randint(0, 1000)
-                    error = {ct.err_code: 999, ct.err_msg: "expect string input, got: <class 'int'>"}
+                    error = {ct.err_code: 999, ct.err_msg: "field (varchar) expects string input, got: <class 'int'>"}
                     collection_w.insert(data=data, check_task=CheckTasks.err_res, check_items=error)
                     data[i][dirty_i] = tmp
                 elif data[i][dirty_i].__class__ is bool:
@@ -2206,7 +2206,7 @@ class TestUpsertInvalid(TestcaseBase):
                 elif data[i][dirty_i].__class__ is str:
                     tmp = data[i][dirty_i]
                     data[i][dirty_i] = random.randint(0, 1000)
-                    error = {ct.err_code: 999, ct.err_msg: "expect string input, got: <class 'int'>"}
+                    error = {ct.err_code: 999, ct.err_msg: "field (varchar) expects string input, got: <class 'int'>"}
                     collection_w.upsert(data=data, check_task=CheckTasks.err_res, check_items=error)
                     data[i][dirty_i] = tmp
                 elif data[i][dirty_i].__class__ is bool: