diff --git a/tests/test_ciphers.py b/tests/test_ciphers.py
index 0f759ad..921407a 100644
--- a/tests/test_ciphers.py
+++ b/tests/test_ciphers.py
@@ -1092,7 +1092,7 @@ def test_chacha_set_iv_resets_both_directions():
 
         chacha = ChaCha(key)
         chacha.set_iv(nonce_a)
-        ct_a1 = chacha.encrypt(plaintext)
+        _ct_a1 = chacha.encrypt(plaintext)
         # Allocate the decryption context too.
         chacha.decrypt(b"\x00" * 16)
         # Changing IV must reset both contexts: subsequent encrypt/decrypt