diff --git a/crypto/symm.rs b/crypto/symm.rs
index 63737c70..dbdb4b5c 100644
--- a/crypto/symm.rs
+++ b/crypto/symm.rs
@@ -211,11 +211,11 @@ mod tests {
            vec!(0x8eu8, 0xa2u8, 0xb7u8, 0xcau8, 0x51u8, 0x67u8, 0x45u8, 0xbfu8,
               0xeau8, 0xfcu8, 0x49u8, 0x90u8, 0x4bu8, 0x49u8, 0x60u8, 0x89u8);
         let c = super::Crypter::new(super::AES_256_ECB);
-        c.init(super::Encrypt, k0.as_slice(), []);
+        c.init(super::Encrypt, k0.as_slice(), vec![]);
         c.pad(false);
         let r0 = c.update(p0.as_slice()).append(c.final().as_slice());
         assert!(r0 == c0);
-        c.init(super::Decrypt, k0.as_slice(), []);
+        c.init(super::Decrypt, k0.as_slice(), vec![]);
         c.pad(false);
         let p1 = c.update(r0.as_slice()).append(c.final().as_slice());
         assert!(p1 == p0);
@@ -225,7 +225,7 @@ mod tests {
         use serialize::hex::ToHex;
 
         let cipher = super::Crypter::new(ciphertype);
-        cipher.init(super::Encrypt, key.from_hex().unwrap().as_slice(), iv.from_hex().unwrap().as_slice());
+        cipher.init(super::Encrypt, key.from_hex().unwrap().as_slice(), iv.from_hex().unwrap());
 
         let expected = Vec::from_slice(ct.from_hex().unwrap().as_slice());
         let computed = cipher.update(pt.from_hex().unwrap().as_slice()).append(cipher.final().as_slice());