diff --git a/Specs/Core/CesiumTerrainProviderSpec.js b/Specs/Core/CesiumTerrainProviderSpec.js
index 8c7885755bf6..575a2009083d 100644
--- a/Specs/Core/CesiumTerrainProviderSpec.js
+++ b/Specs/Core/CesiumTerrainProviderSpec.js
@@ -600,5 +600,20 @@ defineSuite([
                 expect(terrainProvider.getTileDataAvailable(1, 0, 2)).toBe(false);
             });
         });
+
+        it('supports a query string in the base URL', function() {
+            var baseUrl = 'made/up/url?a=some&b=query';
+
+            loadWithXhr.load = function(url, responseType, method, data, headers, deferred, overrideMimeType) {
+                // Just return any old file, as long as its big enough
+                loadWithXhr.defaultLoad('Data/EarthOrientationParameters/IcrfToFixedStkComponentsRotationData.json', responseType, method, data, headers, deferred);
+            };
+
+            returnHeightmapTileJson();
+
+            return waitForTile(0, 0, 0, false, false, function(loadedData) {
+                expect(loadedData).toBeInstanceOf(HeightmapTerrainData);
+            });
+        });
     });
 });
diff --git a/Specs/Scene/TileMapServiceImageryProviderSpec.js b/Specs/Scene/TileMapServiceImageryProviderSpec.js
index 06845062e95f..2eb396bb6f6b 100644
--- a/Specs/Scene/TileMapServiceImageryProviderSpec.js
+++ b/Specs/Scene/TileMapServiceImageryProviderSpec.js
@@ -114,6 +114,28 @@ defineSuite([
         });
     });
 
+    it('supports a query string at the end of the URL', function() {
+        var provider = new TileMapServiceImageryProvider({
+            url : 'made/up/tms/server/?a=some&b=query'
+        });
+
+        return pollToPromise(function() {
+            return provider.ready;
+        }).then(function() {
+            spyOn(loadImage, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
+                expect(url).not.toContain('//');
+
+                // Just return any old image.
+                loadImage.defaultCreateImage('Data/Images/Red16x16.png', crossOrigin, deferred);
+            });
+
+            return provider.requestImage(0, 0, 0).then(function(image) {
+                expect(loadImage.createImage).toHaveBeenCalled();
+                expect(image).toBeInstanceOf(Image);
+            });
+        });
+    });
+
     it('requestImage returns a promise for an image and loads it for cross-origin use', function() {
         var provider = new TileMapServiceImageryProvider({
             url : 'made/up/tms/server/'