diff --git a/tests/python_client/common/common_type.py b/tests/python_client/common/common_type.py
index c903afaf5b..13e59dd0c7 100644
--- a/tests/python_client/common/common_type.py
+++ b/tests/python_client/common/common_type.py
@@ -155,7 +155,7 @@ all_index_types = ["FLAT", "IVF_FLAT", "IVF_SQ8", "IVF_PQ", "HNSW", "ANNOY", "RH
 
 default_index_params = [{"nlist": 128}, {"nlist": 128}, {"nlist": 128}, {"nlist": 128, "m": 16, "nbits": 8},
                         {"M": 48, "efConstruction": 500}, {"n_trees": 50}, {"M": 48, "efConstruction": 500},
-                        {"M": 48, "efConstruction": 500, "PQM": 64}, {"M": 48, "efConstruction": 500}, {"nlist": 128},
+                        {"M": 48, "efConstruction": 500, "PQM": 8}, {"M": 48, "efConstruction": 500}, {"nlist": 128},
                         {"nlist": 128}]
 
 Handler_type = ["GRPC", "HTTP"]
diff --git a/tests/python_client/deploy/scripts/utils.py b/tests/python_client/deploy/scripts/utils.py
index c33aa3bde3..e41debca94 100644
--- a/tests/python_client/deploy/scripts/utils.py
+++ b/tests/python_client/deploy/scripts/utils.py
@@ -10,7 +10,7 @@ all_index_types = ["FLAT", "IVF_FLAT", "IVF_SQ8", "IVF_PQ", "HNSW", "ANNOY", "RH
 
 default_index_params = [{"nlist": 128}, {"nlist": 128}, {"nlist": 128}, {"nlist": 128, "m": 16, "nbits": 8},
                         {"M": 48, "efConstruction": 500}, {"n_trees": 50}, {"M": 48, "efConstruction": 500},
-                        {"M": 48, "efConstruction": 500, "PQM": 64}, {"M": 48, "efConstruction": 500}, {"nlist": 128},
+                        {"M": 48, "efConstruction": 500, "PQM": 8}, {"M": 48, "efConstruction": 500}, {"nlist": 128},
                         {"nlist": 128}]
 
 index_params_map = dict(zip(all_index_types, default_index_params))
diff --git a/tests/python_client/utils/util_pymilvus.py b/tests/python_client/utils/util_pymilvus.py
index 2c1298d47a..fe83ff190a 100644
--- a/tests/python_client/utils/util_pymilvus.py
+++ b/tests/python_client/utils/util_pymilvus.py
@@ -59,7 +59,7 @@ default_index_params = [
     # {"search_length": 50, "out_degree": 40, "candidate_pool_size": 100, "knng": 50},
     {"n_trees": 50},
     {"M": 48, "efConstruction": 500},
-    {"M": 48, "efConstruction": 500, "PQM": 64},
+    {"M": 48, "efConstruction": 500, "PQM": 8},
     {"M": 48, "efConstruction": 500},
     {"nlist": 128},
     {"nlist": 128}