diff --git a/src/lib.rs b/src/lib.rs
index e3ef023b..68d99af5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -107,8 +107,6 @@ extern crate serialize;
 
 #[cfg(test)]
 extern crate test;
-#[cfg(test)]
-extern crate debug;
 
 use std::num::{Zero, One, FloatMath};
 use std::cmp;
diff --git a/tests/mat.rs b/tests/mat.rs
index dc0ed56b..c4a2100d 100644
--- a/tests/mat.rs
+++ b/tests/mat.rs
@@ -1,6 +1,5 @@
 #![feature(macro_rules)]
 
-extern crate debug;
 extern crate "nalgebra" as na;
 
 use std::num::{Float, abs};
@@ -247,7 +246,7 @@ fn test_dmat_from_vec() {
         ]
     );
 
-    println!("mat1: {:?}, mat2: {:?}", mat1, mat2);
+    println!("mat1: {}, mat2: {}", mat1, mat2);
 
     assert!(mat1 == mat2);
 }
diff --git a/tests/quat.rs b/tests/quat.rs
index bec1b231..5c7afbfd 100644
--- a/tests/quat.rs
+++ b/tests/quat.rs
@@ -1,6 +1,5 @@
 #![feature(macro_rules)]
 
-extern crate debug;
 extern crate "nalgebra" as na;
 
 use na::{Pnt3, Vec3, Rot3, UnitQuat, Rotation};
diff --git a/tests/vec.rs b/tests/vec.rs
index 51524a91..0c3054a2 100644
--- a/tests/vec.rs
+++ b/tests/vec.rs
@@ -1,6 +1,5 @@
 #![feature(macro_rules)]
 
-extern crate debug;
 extern crate "nalgebra" as na;
 
 use std::rand::random;