diff --git a/tests/python_client/testcases/test_compaction.py b/tests/python_client/testcases/test_compaction.py
index 7c32c0c385..ab3fb3a8d1 100644
--- a/tests/python_client/testcases/test_compaction.py
+++ b/tests/python_client/testcases/test_compaction.py
@@ -80,8 +80,6 @@ class TestCompactionParams(TestcaseBase):
         # create collection with shard_num=1, and create partition
         collection_w = self.init_collection_wrap(name=cf.gen_unique_str(prefix), shards_num=1)
         partition_w = self.init_partition_wrap(collection_wrap=collection_w)
-        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
-        log.debug(collection_w.index())
 
         # insert flush twice
         for i in range(2):
@@ -89,6 +87,10 @@ class TestCompactionParams(TestcaseBase):
             partition_w.insert(df)
             assert partition_w.num_entities == tmp_nb * (i + 1)
 
+        # create index
+        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
+        log.debug(collection_w.index())
+
         # compact
         collection_w.compact()
         collection_w.wait_for_compaction_completed()
@@ -950,12 +952,10 @@ class TestCompactionOperation(TestcaseBase):
         from pymilvus import utility
         # create collection shard_num=1, insert 2 segments, each with tmp_nb entities
         collection_w = self.init_collection_wrap(name=cf.gen_unique_str(prefix), shards_num=1)
-        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
-        log.debug(collection_w.index())
 
         # insert twice
         df1 = cf.gen_default_dataframe_data(tmp_nb)
-        collection_w.insert(df1)[0]
+        collection_w.insert(df1)
         assert collection_w.num_entities == tmp_nb
 
         df2 = cf.gen_default_dataframe_data(tmp_nb, start=tmp_nb)
@@ -964,6 +964,9 @@ class TestCompactionOperation(TestcaseBase):
 
         tt = utility.mkts_from_hybridts(insert_two.timestamp, milliseconds=0.1)
 
+        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
+        log.debug(collection_w.index())
+
         collection_w.compact()
         collection_w.wait_for_compaction_completed()
         collection_w.get_compaction_plans(check_task=CheckTasks.check_merge_compact)
@@ -1105,11 +1108,11 @@ class TestCompactionOperation(TestcaseBase):
         """
         # insert into two segments with two shard
         collection_w = self.init_collection_wrap(name=cf.gen_unique_str(prefix), shards_num=2)
-        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
-        log.debug(collection_w.index())
         df = cf.gen_default_dataframe_data(tmp_nb)
         collection_w.insert(df)
         assert collection_w.num_entities == tmp_nb
+        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
+        log.debug(collection_w.index())
 
         # compact
         collection_w.compact()
@@ -1134,13 +1137,13 @@ class TestCompactionOperation(TestcaseBase):
         shards_num = 2
         # insert into two segments with two shard
         collection_w = self.init_collection_wrap(name=cf.gen_unique_str(prefix), shards_num=shards_num)
-        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
-        log.debug(collection_w.index())
         df = cf.gen_default_dataframe_data(tmp_nb)
         collection_w.insert(df)
         expr = f"{ct.default_int64_field_name} in [0, 99]"
         collection_w.delete(expr)
         assert collection_w.num_entities == tmp_nb
+        collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
+        log.debug(collection_w.index())
 
         # compact
         sleep(ct.compact_retention_duration + 1)