diff --git a/test/spec/util.js b/test/spec/util.js
index 07968e7c7..8a23b131a 100644
--- a/test/spec/util.js
+++ b/test/spec/util.js
@@ -35,6 +35,22 @@ describe('Util', function() {
                 expect(iD.util.geo.interp(a, b, 0)).to.eql({ lat: 0, lon: 0});
             });
         });
+        describe('#nodeIntersect', function() {
+            it('correctly says that a node is in an extent', function() {
+                expect(iD.util.geo.nodeIntersect({
+                    lat: 0, lon: 0
+                }, [
+                    [-180, 90],
+                    [180, -90]])).to.be.true;
+            });
+            it('correctly says that a node is outside of an extent', function() {
+                expect(iD.util.geo.nodeIntersect({
+                    lat: 0, lon: 0
+                }, [
+                    [100, 90],
+                    [180, -90]])).to.be.false;
+            });
+        });
         describe('#dist', function() {
             it('distance between two same points is zero', function() {
                 var a = [0, 0],