Diagnose when test features are missing
diff --git a/tests/test_precedence.rs b/tests/test_precedence.rs
index 93d50a4..5dbaa2d 100644
--- a/tests/test_precedence.rs
+++ b/tests/test_precedence.rs
@@ -6,7 +6,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(all(feature = "full", feature = "fold"))]
 #![recursion_limit = "1024"]
 #![feature(rustc_private)]
 
@@ -33,6 +32,8 @@
 extern crate syntax;
 extern crate walkdir;
 
+mod features;
+
 use rayon::iter::{IntoParallelIterator, ParallelIterator};
 use regex::Regex;
 use syntax::ast;