diff --git a/buildout.cfg b/buildout.cfg
index 4c7734f..e182f32 100644
--- a/buildout.cfg
+++ b/buildout.cfg
@@ -71,6 +71,7 @@ downloads = .
 packages =
     phaser-official#2.2.2
     jasmine#2.1.3
+    deep-diff#0.3.0
 
 [mkdir-var]
 recipe = z3c.recipe.mkdir
diff --git a/karma.conf.js b/karma.conf.js
index eb524eb..40b46bd 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -5,6 +5,7 @@ module.exports = function (config) {
         frameworks: ['jasmine'],
         files: [
             'src/vendor/phaser-official/build/phaser.js',
+            'src/vendor/deep-diff/releases/deep-diff-0.3.0.min.js',
             'build/main.js'
         ],
         client: {
diff --git a/src/index.html b/src/index.html
index 8109edc..3b4fb3d 100644
--- a/src/index.html
+++ b/src/index.html
@@ -15,6 +15,7 @@
 
 <!-- build:remove -->
 <script src="http://localhost:35729/livereload.js"></script>
+<script src="vendor/deep-diff/releases/deep-diff-0.3.0.min.js"></script>
 <!-- /build -->
 
 <!-- build:js all.min.js -->
diff --git a/src/scripts/game/ai/AbstractAI.ts b/src/scripts/game/ai/AbstractAI.ts
index 2ed1540..0eb6d15 100644
--- a/src/scripts/game/ai/AbstractAI.ts
+++ b/src/scripts/game/ai/AbstractAI.ts
@@ -18,7 +18,7 @@ module SpaceTac.Game.AI {
         async: boolean;
 
         // Time at which work as started
-        private started: number;
+        started: number;
 
         // Queue of work items to process
         //  Work items will be called successively, leaving time for other processing between them.
diff --git a/src/scripts/game/specs/Universe.spec.ts b/src/scripts/game/specs/Universe.spec.ts
index 4737ae7..ad1290b 100644
--- a/src/scripts/game/specs/Universe.spec.ts
+++ b/src/scripts/game/specs/Universe.spec.ts
@@ -25,6 +25,17 @@ module SpaceTac.Game.Specs {
             applyGameSteps(universe);
             applyGameSteps(loaded_universe);
 
+            // Clean stored times as they might differ
+            var clean = (u: Universe) => {
+                u.battle.fleets.forEach((fleet: Fleet) => {
+                    if (fleet.player.ai) {
+                        fleet.player.ai.started = 0;
+                    }
+                });
+            };
+            clean(universe);
+            clean(loaded_universe);
+
             // Check equality after game steps
             expect(loaded_universe).toEqual(universe);
         });