Use my own fork of Karma.

It adds the ability to specify in file patterns whether the matching files should be considered binary files.  I'll open a Karma pull request with this soon because it fixes karma-runner/karma#1070.

Specs/karma-spec-main.js

@@ -225,7 +225,7 @@ require(['./ThirdParty/when'], function(when) {
      * Load the modules via AMD, and then run all of the loaded specs. This includes initializing the `HtmlReporter` instance and then executing the loaded Jasmine environment.
      */
     var modules = ['Specs/addDefaultMatchers-2.1', 'Specs/equalsMethodEqualityTester-2.1'].concat(specs);
-    //var modules = ['Specs/addDefaultMatchers-2.1', 'Specs/equalsMethodEqualityTester-2.1', 'Specs/Scene/GlobeSpec'];
+    //var modules = ['Specs/addDefaultMatchers-2.1', 'Specs/equalsMethodEqualityTester-2.1', 'Specs/Core/CesiumTerrainProviderSpec'];
     require(modules, function(addDefaultMatchers, equalsMethodEqualityTester) {
         //jasmine.DEFAULT_TIMEOUT_INTERVAL = 1000000;
         //htmlReporter.initialize();

karma.conf.js

@@ -18,12 +18,12 @@ module.exports = function(config) {
         'Specs/karma-spec-main.js',
         {pattern: 'Source/**/*.js', included: false},
         {pattern: 'Specs/**/*.js', included: false},
-        {pattern: 'Specs/Data/**', included: false},
-        {pattern: 'Source/Assets/**', included: false}
+        {pattern: 'Specs/Data/**', included: false, isBinary: true},
+        {pattern: 'Source/Assets/**', included: false, isBinary: true}
     ],
 
     proxies: {
-        '/Data': 'http://localhost:8080/Specs/Data'
+        '/Data': '/base/Specs/Data'
     },
 
     // list of files to exclude
@@ -67,6 +67,6 @@ module.exports = function(config) {
 
     // Continuous Integration mode
     // if true, Karma captures browsers, runs the tests and exits
-    singleRun: false
+    singleRun: true
   });
 };

package.json

@@ -13,7 +13,7 @@
     "express": "4.4.4",
     "jasmine-core": "^2.1.3",
     "jsdoc": "3.3.0-alpha9",
-    "karma": "^0.12.30",
+    "karma": "kring/karma#filePatternBinary",
     "karma-chrome-launcher": "^0.1.7",
     "karma-firefox-launcher": "^0.1.4",
     "karma-ie-launcher": "^0.1.5",