diff --git a/tests/test_trezor.crypto.crc.py b/tests/test_trezor.crypto.crc.py
index 01abcd89..b9d96846 100644
--- a/tests/test_trezor.crypto.crc.py
+++ b/tests/test_trezor.crypto.crc.py
@@ -1,7 +1,6 @@
 from common import *
 
 from trezor.crypto import crc
-from ubinascii import unhexlify
 
 
 class TestCryptoCrc(unittest.TestCase):