diff --git a/Cargo.toml b/Cargo.toml
index c2fd4ca3..53bf38d3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,3 +34,6 @@ version = "0.1"
 
 [dev-dependencies]
 url = "0.2"
+
+[profile.dev]
+debug = false
diff --git a/tests/test.rs b/tests/test.rs
index 471e3a80..ae4d5b2b 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -1,4 +1,4 @@
-#![feature(slicing_syntax, core, std_misc, io)]
+#![feature(core, std_misc, io)]
 
 extern crate postgres;
 extern crate "rustc-serialize" as serialize;