diff --git a/src/shims/intrinsics.rs b/src/shims/intrinsics.rs
index d62e921695..54f826db1f 100644
--- a/src/shims/intrinsics.rs
+++ b/src/shims/intrinsics.rs
@@ -5,7 +5,7 @@ use rustc::ty::layout::{self, LayoutOf, Size};
 use rustc::ty;
 
 use crate::{
-    PlaceTy, OpTy, ImmTy, Immediate, Scalar, ScalarMaybeUndef, Tag,
+    PlaceTy, OpTy, ImmTy, Immediate, Scalar, Tag,
     OperatorEvalContextExt
 };
 
diff --git a/tests/compiletest.rs b/tests/compiletest.rs
index 076deca6a3..4d799cdb54 100644
--- a/tests/compiletest.rs
+++ b/tests/compiletest.rs
@@ -1,8 +1,7 @@
-#![feature(slice_concat_ext, custom_test_frameworks)]
+#![feature(custom_test_frameworks)]
 // Custom test runner, to avoid libtest being wrapped around compiletest which wraps libtest.
 #![test_runner(test_runner)]
 
-use std::slice::SliceConcatExt;
 use std::path::PathBuf;
 use std::env;