Check key size in cipher_setkey()
diff --git a/tests/suites/test_suite_cipher.aes.data b/tests/suites/test_suite_cipher.aes.data
index 94da98e..fc31130 100644
--- a/tests/suites/test_suite_cipher.aes.data
+++ b/tests/suites/test_suite_cipher.aes.data
@@ -788,7 +788,7 @@
 
 AES Decrypt test vector #6
 depends_on:POLARSSL_AES_C:POLARSSL_CIPHER_MODE_CFB
-decrypt_test_vec:POLARSSL_CIPHER_AES_128_CFB128:-1:"ffffffffff800000000000000000000000000000000000000000000000000000":"00000000000000000000000000000000":"be66cfea2fecd6bf0ec7b4352c99bcaa":"00000000000000000000000000000000":"":"":0:0
+decrypt_test_vec:POLARSSL_CIPHER_AES_256_CFB128:-1:"ffffffffff800000000000000000000000000000000000000000000000000000":"00000000000000000000000000000000":"be66cfea2fecd6bf0ec7b4352c99bcaa":"00000000000000000000000000000000":"":"":0:0
 
 AES-128-ECB Encrypt NIST KAT #1
 depends_on:POLARSSL_AES_C:POLARSSL_CIPHER_MODE_CBC