diff --git a/src/tests/plane.rs b/src/tests/plane.rs
new file mode 100644
index 0000000..61830ad
--- /dev/null
+++ b/src/tests/plane.rs
@@ -0,0 +1,28 @@
+// Copyright 2013 The CGMath Developers. For a full listing of the authors,
+// refer to the AUTHORS file at the top-level directory of this distribution.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use cgmath::plane::*;
+use cgmath::point::*;
+
+#[test]
+fn test_from_points() {
+    assert_eq!(Plane::from_points(Point3::new(5f, 0f,  5f),
+                                  Point3::new(5f, 5f,  5f),
+                                  Point3::new(5f, 0f, -1f)), Some(Plane::from_abcd(-1f, 0f, 0f, 5f)));
+
+    assert_eq!(Plane::from_points(Point3::new(0f, 5f, -5f),
+                                  Point3::new(0f, 5f,  0f),
+                                  Point3::new(0f, 5f,  5f)), None);     // The points are parallel
+}
diff --git a/src/tests/test.rs b/src/tests/test.rs
index c58f6a3..de0af72 100644
--- a/src/tests/test.rs
+++ b/src/tests/test.rs
@@ -15,6 +15,22 @@
 
 extern mod cgmath;
 
-mod vector;
+// pub mod array;
+// pub mod matrix;
+// pub mod quaternion;
+pub mod vector;
 
-mod angle;
+pub mod angle;
+pub mod plane;
+// pub mod point;
+// pub mod ray;
+// pub mod rotation;
+
+// pub mod projection;
+
+// pub mod aabb;
+// pub mod cylinder;
+// pub mod frustum;
+// pub mod intersect;
+// pub mod obb;
+// pub mod sphere;