diff --git a/test/spec/renderer/background.js b/test/spec/renderer/background.js
index 0af07f21a..5c97da1d8 100644
--- a/test/spec/renderer/background.js
+++ b/test/spec/renderer/background.js
@@ -1,43 +1,51 @@
 describe('Background', function() {
-  var c, d;
+    var c, d;
 
-  beforeEach(function() {
-      d = d3.select(document.createElement('div'));
-      c = iD.Background(d).projection(d3.geo.mercator());
-      d.call(c);
-  });
+    beforeEach(function() {
+        d = d3.select(document.createElement('div'));
+        c = iD.Background(d).projection(d3.geo.mercator());
+        d.call(c);
+    });
 
-  afterEach(function() {
-      d.remove();
-  });
+    afterEach(function() {
+        d.remove();
+    });
 
-  describe('iD.Background', function() {
-      it('is instantiated', function() {
-          expect(c).to.be.ok;
-      });
+    describe('iD.Background', function() {
+        it('is instantiated', function() {
+            expect(c).to.be.ok;
+        });
 
-      it('#size', function() {
-          expect(c.size([100, 100])).to.equal(c);
-          expect(c.size()).to.eql([100,100]);
-      });
+        it('#size', function() {
+            expect(c.size([100, 100])).to.equal(c);
+            expect(c.size()).to.eql([100,100]);
+        });
 
-      it('#source', function() {
-          expect(c.source(iD.BackgroundSource.Bing)).to.equal(c);
-          expect(c.source()).to.equal(iD.BackgroundSource.Bing);
-      });
-  });
+        it('#source', function() {
+            expect(c.source(iD.BackgroundSource.Bing)).to.equal(c);
+            expect(c.source()).to.equal(iD.BackgroundSource.Bing);
+        });
+    });
 
-  describe('iD.BackgroundSource.Bing', function() {
-      it('generates tiles', function() {
-          expect(iD.BackgroundSource.Bing([0,0,0])).to.equal('http://ecn.t0.tiles.virtualearth.net/tiles/a.jpeg?g=587&mkt=en-gb&n=z');
-      });
-  });
+    describe('iD.BackgroundSource.Bing', function() {
+        it('generates tiles', function() {
+            expect(iD.BackgroundSource.Bing([0,0,0])).to.equal('http://ecn.t0.tiles.virtualearth.net/tiles/a.jpeg?g=587&mkt=en-gb&n=z');
+        });
+    });
 
-  describe('iD.BackgroundSource.Template', function() {
-      it('generates a tile-generating source', function() {
-          var source = iD.BackgroundSource.template('{z}/{x}/{y}');
-          expect(source([0,1,2])).to.equal('2/0/1');
-      });
-  });
+    describe('iD.BackgroundSource.Template', function() {
+        it('generates a tile-generating source', function() {
+            var source = iD.BackgroundSource.template('{z}/{x}/{y}');
+            expect(source([0,1,2])).to.equal('2/0/1');
+        });
+        it('supports subdomains', function() {
+            var source = iD.BackgroundSource.template('{t}/{z}/{x}/{y}', ['apples', 'oranges']);
+            expect(source([0,1,2])).to.equal('apples/2/0/1');
+        });
+        it('distributes requests between subdomains', function() {
+            var source = iD.BackgroundSource.template('{t}/{z}/{x}/{y}', ['apples', 'oranges']);
+            expect(source([0,1,1])).to.equal('oranges/1/0/1');
+        });
+    });
 
 });