1 files changed, 3 insertions, 4 deletions
diff --git a/compiler/rustc_serialize/tests/opaque.rs b/compiler/rustc_serialize/tests/opaque.rs
index ec3c34f8bdb..703b7f5e7a5 100644
--- a/compiler/rustc_serialize/tests/opaque.rs
+++ b/compiler/rustc_serialize/tests/opaque.rs
@@ -2,7 +2,7 @@
 
 use rustc_macros::{Decodable, Encodable};
 use rustc_serialize::opaque::{Decoder, Encoder};
-use rustc_serialize::{Decodable, Encodable};
+use rustc_serialize::{Decodable, Encodable, Encoder as EncoderTrait};
 use std::fmt::Debug;
 
 #[derive(PartialEq, Clone, Debug, Encodable, Decodable)]
@@ -32,12 +32,11 @@ fn check_round_trip<T: Encodable<Encoder> + for<'a> Decodable<Decoder<'a>> + Par
     values: Vec<T>,
 ) {
     let mut encoder = Encoder::new();
-
     for value in &values {
-        Encodable::encode(value, &mut encoder).unwrap();
+        Encodable::encode(value, &mut encoder);
     }
 
-    let data = encoder.into_inner();
+    let data = encoder.finish().unwrap();
     let mut decoder = Decoder::new(&data[..], 0);
 
     for value in values {