diff --git a/test/unit_test/perception/Obstalce.tests.js b/test/unit_test/perception/Obstalce.tests.js
index 3ebcd935..787e1531 100644
--- a/test/unit_test/perception/Obstalce.tests.js
+++ b/test/unit_test/perception/Obstalce.tests.js
@@ -43,13 +43,15 @@ describe( 'Obstacle', function () {
 			const geometry = new MeshGeometry( vertices, indices );
 			const obstacle = new Obstacle( geometry );
 			const intersectionPoint = new Vector3();
+			const normal = new Vector3();
 
 			const ray = new Ray( new Vector3( 0.5, 1, 0.5 ), new Vector3( 0, - 1, 0 ) );
 
-			const result = obstacle.intersectRay( ray, intersectionPoint );
+			const result = obstacle.intersectRay( ray, intersectionPoint, normal );
 
 			expect( result ).not.to.be.null;
 			expect( intersectionPoint ).to.deep.equal( { x: 0.5, y: 0, z: 0.5 } );
+			expect( normal ).to.deep.equal( { x: 0, y: 1, z: 0 } );
 
 		} );
 
@@ -60,13 +62,15 @@ describe( 'Obstacle', function () {
 			const geometry = new MeshGeometry( vertices );
 			const obstacle = new Obstacle( geometry );
 			const intersectionPoint = new Vector3();
+			const normal = new Vector3();
 
 			const ray = new Ray( new Vector3( 0.5, 1, 0.5 ), new Vector3( 0, - 1, 0 ) );
 
-			const result = obstacle.intersectRay( ray, intersectionPoint );
+			const result = obstacle.intersectRay( ray, intersectionPoint, normal );
 
 			expect( result ).not.to.be.null;
 			expect( intersectionPoint ).to.deep.equal( { x: 0.5, y: 0, z: 0.5 } );
+			expect( normal ).to.deep.equal( { x: 0, y: 1, z: 0 } );
 
 		} );