diff --git a/test/tests/Point.js b/test/tests/Point.js
index 5cebde0b..448f4b2b 100644
--- a/test/tests/Point.js
+++ b/test/tests/Point.js
@@ -130,3 +130,18 @@ test('equals()', function() {
 		return new Point(0, 0).equals(null);
 	}, false);
 });
+
+test('isColinear()', function() {
+	equals(function() {
+		return new Point(10, 5).isColinear(new Point(20, 10));
+	}, true);
+	equals(function() {
+		return new Point(5, 10).isColinear(new Point(-5, -10));
+	}, true);
+	equals(function() {
+		return new Point(10, 10).isColinear(new Point(20, 10));
+	}, false);
+	equals(function() {
+		return new Point(10, 10).isColinear(new Point(10, -10));
+	}, false);
+});