diff --git a/tests/test_autochunk/test_autochunk_search.py b/tests/test_autochunk/test_autochunk_search.py
index c824a43ab..6f7214633 100644
--- a/tests/test_autochunk/test_autochunk_search.py
+++ b/tests/test_autochunk/test_autochunk_search.py
@@ -8,8 +8,6 @@ import torch.multiprocessing as mp
 import colossalai
 from colossalai.autochunk.autochunk_codegen import AutoChunkCodeGen
 from colossalai.core import global_context as gpc
-from colossalai.fx import ColoTracer
-from colossalai.fx.graph_module import ColoGraphModule
 from colossalai.fx.passes.meta_info_prop import MetaInfoProp
 from colossalai.fx.profiler import MetaTensor
 from colossalai.utils import free_port
@@ -32,12 +30,31 @@ def assert_chunk_infos(chunk_infos, max_memory, msa_len, pair_len):
             raise NotImplementedError()
     else:
         raise NotImplementedError()
-    
-    assert len(found_regions) == len(target_regions), "len of found regions %s doesn't equal len of target regions %s" % (str(found_regions), str(target_regions))
+
+    assert len(found_regions) == len(
+        target_regions
+    ), "len of found regions %s doesn't equal len of target regions %s" % (
+        str(found_regions),
+        str(target_regions),
+    )
     for region in target_regions:
-        assert region in found_regions, "region:%s not in found regions for msa:%d, pair:%d, maxmem:%d" % (str(region), msa_len, pair_len, max_memory)
+        assert (
+            region in found_regions
+        ), "region:%s not in found regions for msa:%d, pair:%d, maxmem:%d" % (
+            str(region),
+            msa_len,
+            pair_len,
+            max_memory,
+        )
     for region in found_regions:
-        assert region in target_regions, "region:%s should not be found for msa:%d, pair:%d, maxmem:%d" % (str(region), msa_len, pair_len, max_memory)
+        assert (
+            region in target_regions
+        ), "region:%s should not be found for msa:%d, pair:%d, maxmem:%d" % (
+            str(region),
+            msa_len,
+            pair_len,
+            max_memory,
+        )
 
 
 def _test_autochunk_search(rank, msa_len, pair_len, max_memory):