diff --git a/test/index.html b/test/index.html
index c5461c316..33e0ebd73 100644
--- a/test/index.html
+++ b/test/index.html
@@ -49,6 +49,7 @@
 
     <!-- include spec files here... -->
     <script type="text/javascript" src="spec/util.js"></script>
+    <script type="text/javascript" src="spec/background.js"></script>
     <script type="text/javascript" src="spec/way.js"></script>
     <script type="text/javascript" src="spec/map.js"></script>
     <script type="text/javascript" src="spec/hash.js"></script>
diff --git a/test/spec/Entity.js b/test/spec/Entity.js
index deebe986e..a13036f0b 100644
--- a/test/spec/Entity.js
+++ b/test/spec/Entity.js
@@ -12,6 +12,12 @@ describe('Entity', function () {
                 e = iD.Entity().update({tags: tags});
             expect(e.tags).toBe(tags);
         });
+
+        it("tags the entity as updated", function () {
+            var tags = {foo: 'bar'},
+                e = iD.Entity().update({tags: tags});
+            expect(e._updated).toBe(true);
+        });
     });
 
     describe("#created", function () {
diff --git a/test/spec/background.js b/test/spec/background.js
new file mode 100644
index 000000000..c36662e4c
--- /dev/null
+++ b/test/spec/background.js
@@ -0,0 +1,37 @@
+describe('Background', function() {
+  var c, d;
+
+  beforeEach(function() {
+      d = d3.select(document.createElement('div'));
+      c = iD.Background()
+        .projection(d3.geo.mercator());
+      d.call(c);
+  });
+
+  afterEach(function() {
+      d.remove();
+  });
+
+  describe('iD.Background', function() {
+      it('is instantiated', function() {
+          expect(c).toBeTruthy();
+      });
+
+      it('#size', function() {
+          expect(c.size([100, 100])).toEqual(c);
+          expect(c.size()).toEqual([100,100]);
+      });
+
+      it('#source', function() {
+          expect(c.source(iD.Background.Bing)).toEqual(c);
+          expect(c.source()).toEqual(iD.Background.Bing);
+      });
+  });
+
+  describe('iD.Background.Bing', function() {
+      it('generates tiles', function() {
+          expect(iD.Background.Bing([0,0,0])).toEqual('http://ecn.t0.tiles.virtualearth.net/tiles/a.jpeg?g=587&mkt=en-gb&n=z');
+      });
+  });
+
+});
diff --git a/test/spec/style.js b/test/spec/style.js
new file mode 100644
index 000000000..115b7ff78
--- /dev/null
+++ b/test/spec/style.js
@@ -0,0 +1,16 @@
+describe('Style', function() {
+    describe('#waystack', function() {
+        it('stacks bridges over non-bridges', function() {
+            var a = { tags: { bridge: 'yes' } },
+            b = { tags: {} };
+            expect(iD.Style.waystack(a, b)).toEqual(1);
+            expect(iD.Style.waystack(b, a)).toEqual(-1);
+        });
+        it('stacks layers', function() {
+            var a = { tags: { layer: 1 } },
+            b = { tags: { layer: 0 } };
+            expect(iD.Style.waystack(a, b)).toEqual(1);
+            expect(iD.Style.waystack(b, a)).toEqual(-1);
+        });
+    });
+});