diff --git a/tests/test_autochunk/test_autochunk_codegen.py b/tests/test_autochunk/test_autochunk_codegen.py
index a061e0ce1..02fa07e2c 100644
--- a/tests/test_autochunk/test_autochunk_codegen.py
+++ b/tests/test_autochunk/test_autochunk_codegen.py
@@ -40,20 +40,16 @@ def _test_fwd(model: torch.nn.Module, gm: ColoGraphModule, node, pair):
         non_fx_out = model(node, pair)
         fx_out = gm(node, pair)
 
-    assert torch.allclose(
-        non_fx_out[0], fx_out[0], atol=1e-4
-    ), "fx_out doesn't comply with original output, diff is %.2e" % torch.mean(
-        torch.abs(non_fx_out[0] - fx_out[0])
-    )
-    assert torch.allclose(
-        non_fx_out[1], fx_out[1], atol=1e-4
-    ), "fx_out doesn't comply with original output, diff is %.2e" % torch.mean(
-        torch.abs(non_fx_out[1] - fx_out[1])
-    )
+    assert torch.allclose(non_fx_out[0], fx_out[0],
+                          atol=1e-4), "fx_out doesn't comply with original output, diff is %.2e" % torch.mean(
+                              torch.abs(non_fx_out[0] - fx_out[0]))
+    assert torch.allclose(non_fx_out[1], fx_out[1],
+                          atol=1e-4), "fx_out doesn't comply with original output, diff is %.2e" % torch.mean(
+                              torch.abs(non_fx_out[1] - fx_out[1]))
 
 
 def _test_autochunk_codegen(rank, msa_len, pair_len, max_memory):
-    # launch colossalai to make sure we could execute colossalai.utils.checkpoint currectly
+    # launch colossalai
     colossalai.launch(
         config={},
         rank=rank,
@@ -76,18 +72,14 @@ def _test_autochunk_codegen(rank, msa_len, pair_len, max_memory):
             "pair": pair.to(torch.device("meta")),
         },
     )
-    gm_prop = torch.fx.symbolic_trace(model)  # must use symbolic_trace
+    gm_prop = torch.fx.symbolic_trace(model)    # must use symbolic_trace
     interp = MetaInfoProp(gm_prop)
-    interp.propagate(
-        MetaTensor(node, fake_device="cuda:0"), MetaTensor(pair, fake_device="cuda:0")
-    )
+    interp.propagate(MetaTensor(node, fake_device="cuda:0"), MetaTensor(pair, fake_device="cuda:0"))
 
     # now run it twice to get meta info in graph module, not necessary
     gm = torch.fx.GraphModule(model, graph)
     interp = MetaInfoProp(gm)
-    interp.propagate(
-        MetaTensor(node, fake_device="cuda:0"), MetaTensor(pair, fake_device="cuda:0")
-    )
+    interp.propagate(MetaTensor(node, fake_device="cuda:0"), MetaTensor(pair, fake_device="cuda:0"))
 
     codegen = AutoChunkCodeGen(gm_prop, max_memory=max_memory)
     graph.set_codegen(codegen)
diff --git a/tests/test_autochunk/test_autochunk_search.py b/tests/test_autochunk/test_autochunk_search.py
index 537bf4f41..371fce64f 100644
--- a/tests/test_autochunk/test_autochunk_search.py
+++ b/tests/test_autochunk/test_autochunk_search.py
@@ -23,7 +23,8 @@ def assert_chunk_infos(chunk_infos, max_memory, msa_len, pair_len):
 
     if msa_len == 32 and pair_len == 64:
         if max_memory is None:
-            target_regions = [(142, 154), (366, 373), (233, 283), (301, 351), (127, 134), (204, 228), (167, 191), (161, 166), (198, 203), (6, 69)]
+            target_regions = [(142, 154), (366, 373), (233, 283), (301, 351), (127, 134), (204, 228), (167, 191),
+                              (161, 166), (198, 203), (6, 69)]
         elif max_memory == 20:
             target_regions = [(142, 154), (369, 373), (233, 269), (301, 351)]
         elif max_memory == 25:
@@ -36,24 +37,19 @@ def assert_chunk_infos(chunk_infos, max_memory, msa_len, pair_len):
         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),
-    )
+        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" % (
+        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" % (
+        assert (region in target_regions), "region:%s should not be found for msa:%d, pair:%d, maxmem:%d" % (
             str(region),
             msa_len,
             pair_len,
@@ -62,7 +58,7 @@ def assert_chunk_infos(chunk_infos, max_memory, msa_len, pair_len):
 
 
 def _test_autochunk_search(rank, msa_len, pair_len, max_memory):
-    # launch colossalai to make sure we could execute colossalai.utils.checkpoint currectly
+    # launch colossalai
     colossalai.launch(
         config={},
         rank=rank,
@@ -77,11 +73,9 @@ def _test_autochunk_search(rank, msa_len, pair_len, max_memory):
     node = torch.randn(1, msa_len, pair_len, 256).cuda()
     pair = torch.randn(1, pair_len, pair_len, 128).cuda()
 
-    gm_prop = torch.fx.symbolic_trace(model)  # must use symbolic_trace
+    gm_prop = torch.fx.symbolic_trace(model)    # must use symbolic_trace
     interp = MetaInfoProp(gm_prop)
-    interp.propagate(
-        MetaTensor(node, fake_device="cuda:0"), MetaTensor(pair, fake_device="cuda:0")
-    )
+    interp.propagate(MetaTensor(node, fake_device="cuda:0"), MetaTensor(pair, fake_device="cuda:0"))
 
     codegen = AutoChunkCodeGen(gm_prop, max_memory=max_memory)
     chunk_infos = codegen.chunk_infos