diff --git a/tests/python_client/testcases/test_compaction.py b/tests/python_client/testcases/test_compaction.py
index 31cfd8baf7..5581ddb070 100644
--- a/tests/python_client/testcases/test_compaction.py
+++ b/tests/python_client/testcases/test_compaction.py
@@ -236,7 +236,15 @@ class TestCompactionParams(TestcaseBase):
 
         # Flush a new segment and meet condition 20% deleted entities, triggre compaction but no way to get plan
         collection_w.insert(cf.gen_default_dataframe_data(1, start=tmp_nb))
-        assert collection_w.num_entities == tmp_nb + 1
+
+        exp_num_entities_after_compact = tmp_nb - (tmp_nb // ct.compact_delta_ratio_reciprocal) + 1
+        start = time()
+        while True:
+            if collection_w.num_entities == exp_num_entities_after_compact:
+                break
+            if time() - start > 60:
+                raise MilvusException(1, "Auto delete ratio compaction cost more than 60s")
+            sleep(1)
 
         collection_w.create_index(ct.default_float_vec_field_name, index_params=ct.default_flat_index)
         collection_w.load()
diff --git a/tests/python_client/testcases/test_delete.py b/tests/python_client/testcases/test_delete.py
index 78febe2790..c494c7f91a 100644
--- a/tests/python_client/testcases/test_delete.py
+++ b/tests/python_client/testcases/test_delete.py
@@ -387,7 +387,7 @@ class TestDeleteOperation(TestcaseBase):
         # delete half and flush
         expr = f'{ct.default_int64_field_name} in {insert_res.primary_keys[:ct.default_nb // 2]}'
         del_res, _ = collection_w.delete(expr)
-        assert collection_w.num_entities == ct.default_nb
+        assert collection_w.num_entities in [ct.default_nb, ct.default_nb // 2]
 
         # create index
         index_params = {"index_type": "IVF_SQ8",