diff --git a/src/test/run-pass/drop-flag-sanity-check.rs b/src/test/run-pass/drop-flag-sanity-check.rs
index bc836f6c8487..02f6cc70fd5b 100644
--- a/src/test/run-pass/drop-flag-sanity-check.rs
+++ b/src/test/run-pass/drop-flag-sanity-check.rs
@@ -17,6 +17,8 @@
 //
 // See also drop-flag-skip-sanity-check.rs.
 
+#![feature(old_io)]
+
 use std::env;
 use std::old_io::process::{Command, ExitSignal, ExitStatus};
 
diff --git a/src/test/run-pass/drop-flag-skip-sanity-check.rs b/src/test/run-pass/drop-flag-skip-sanity-check.rs
index 0b58bb16857f..7066b4017af2 100644
--- a/src/test/run-pass/drop-flag-skip-sanity-check.rs
+++ b/src/test/run-pass/drop-flag-skip-sanity-check.rs
@@ -17,6 +17,8 @@
 //
 // See also drop-flag-sanity-check.rs.
 
+#![feature(old_io)]
+
 use std::env;
 use std::old_io::process::{Command, ExitSignal, ExitStatus};
 
diff --git a/src/test/run-pass/intrinsic-move-val.rs b/src/test/run-pass/intrinsic-move-val.rs
index cd517bcad300..cf978816551e 100644
--- a/src/test/run-pass/intrinsic-move-val.rs
+++ b/src/test/run-pass/intrinsic-move-val.rs
@@ -13,6 +13,7 @@
 #![allow(unknown_features)]
 #![feature(box_syntax)]
 #![feature(intrinsics)]
+#![feature(filling_drop)] // needed to check for drop fill word.
 
 use std::mem::{self, transmute};