diff --git a/sot/infer_meta.py b/sot/infer_meta.py
index 599c2f6df..21523d0f7 100644
--- a/sot/infer_meta.py
+++ b/sot/infer_meta.py
@@ -176,15 +176,14 @@ def infer_meta_for_layer(layer, *args, **kwargs):
         layer, paddle.nn.Layer
     ), f"Expect a Layer, but got {layer}."
     layer = paddle.jit.to_static(layer, enable_fallback=False)
+
     args_, kwargs_ = convert_meta_to_input_spec(
         args
     ), convert_meta_to_input_spec(kwargs)
-
     (
         concrete_program,
         partial_program_layer,
     ) = layer.forward.get_concrete_program(*args_, **kwargs_)
-
     out = partial_program_layer._restore_out(
         convert_variable_to_meta_info(concrete_program.outputs)
     )
diff --git a/tests/test_instruction_translator_cache.py b/tests/test_instruction_translator_cache.py
index ccc53f2f8..019a6b0e3 100644
--- a/tests/test_instruction_translator_cache.py
+++ b/tests/test_instruction_translator_cache.py
@@ -65,9 +65,13 @@ def fake_inner_fn_5():
 
 
 def mock_start_translate(frame: types.FrameType, **kwargs):
+    true_lambda = lambda frame: True
+    true_lambda.expr = "lambda frame: True"
+    false_lambda = lambda frame: False
+    false_lambda.expr = "lambda frame: False"
     translate_map = {
-        FRAME_1: (FRAME_2.f_code, lambda frame: True),
-        FRAME_3: (FRAME_4.f_code, lambda frame: False),  # Always re-compile
+        FRAME_1: (FRAME_2.f_code, true_lambda),
+        FRAME_3: (FRAME_4.f_code, false_lambda),  # Always re-compile
         FRAME_5: None,
     }
     return translate_map[frame]