diff --git a/test/torchaudio_unittest/common_utils/sox_utils.py b/test/torchaudio_unittest/common_utils/sox_utils.py
index fd0949f31a..ebae9a7d8f 100644
--- a/test/torchaudio_unittest/common_utils/sox_utils.py
+++ b/test/torchaudio_unittest/common_utils/sox_utils.py
@@ -49,8 +49,6 @@ def gen_audio_file(
     ]
     if compression is not None:
         command += ['--compression', str(compression)]
-    if bit_depth is not None:
-        command += ['--bits', str(bit_depth)]
     if encoding is not None:
         command += ['--encoding', str(encoding)]
     command += [