diff --git a/tests/system-test/2-query/csum.py b/tests/system-test/2-query/csum.py
index 75509124ee..b7fa9a0cbb 100644
--- a/tests/system-test/2-query/csum.py
+++ b/tests/system-test/2-query/csum.py
@@ -83,8 +83,8 @@ class TDTestCase:
 
                 tdSql.query(f"select {col} {alias} from {table_expr} {pre_condition}")
                 pre_data = np.array(tdSql.queryResult)[np.array(tdSql.queryResult) != None]
-                if (platform.system().lower() == 'windows' and pre_result.dtype == 'int32'):
-                    pre_result = np.array(pre_result, dtype = 'int64')
+                if (platform.system().lower() == 'windows' and pre_data.dtype == 'int32'):
+                    pre_data = np.array(pre_data, dtype = 'int64')
                 print("data is ", pre_data)
                 pre_csum = np.cumsum(pre_data)
                 tdSql.query(self.csum_query_form(
diff --git a/tests/system-test/2-query/function_diff.py b/tests/system-test/2-query/function_diff.py
index 272cf4ef24..8edc96ed81 100644
--- a/tests/system-test/2-query/function_diff.py
+++ b/tests/system-test/2-query/function_diff.py
@@ -83,8 +83,8 @@ class TDTestCase:
 
                 tdSql.query(f"select {col} {alias} from {table_expr} {pre_condition}")
                 pre_data = np.array(tdSql.queryResult)[np.array(tdSql.queryResult) != None]
-                if (platform.system().lower() == 'windows' and pre_result.dtype == 'int32'):
-                    pre_result = np.array(pre_result, dtype = 'int64')
+                if (platform.system().lower() == 'windows' and pre_data.dtype == 'int32'):
+                    pre_data = np.array(pre_data, dtype = 'int64')
                 pre_diff = np.diff(pre_data)
                 # trans precision for data
                 tdSql.query(self.diff_query_form(
diff --git a/tests/system-test/2-query/mavg.py b/tests/system-test/2-query/mavg.py
index 13d2b4d420..fa2d0f47a4 100644
--- a/tests/system-test/2-query/mavg.py
+++ b/tests/system-test/2-query/mavg.py
@@ -245,6 +245,8 @@ class TDTestCase:
 
                 tdSql.query(f"select {col} {alias} from {table_expr} {pre_condition}")
                 pre_data = np.array(tdSql.queryResult)[np.array(tdSql.queryResult) != None]
+                if (platform.system().lower() == 'windows' and pre_data.dtype == 'int32'):
+                    pre_data = np.array(pre_data, dtype = 'int64')
                 pre_mavg = np.convolve(pre_data, np.ones(k), "valid")/k
                 tdSql.query(self.mavg_query_form(
                     sel=sel, func=func, col=col, m_comm=m_comm, k=k, r_comm=r_comm, alias=alias, fr=fr,
@@ -291,6 +293,8 @@ class TDTestCase:
             # print(f"select {col} from {table_expr} {re.sub('limit [0-9]*|offset [0-9]*','',condition)}")
             if not tdSql.queryResult:
                 pre_result = np.array(tdSql.queryResult)[np.array(tdSql.queryResult) != None]
+                if (platform.system().lower() == 'windows' and pre_result.dtype == 'int32'):
+                    pre_result = np.array(pre_result, dtype = 'int64')
             
                 pre_mavg = pre_mavg = np.convolve(pre_result, np.ones(k), "valid")[offset_val:]/k
                 tdSql.query(self.mavg_query_form(