diff --git a/package.json b/package.json
index aecc268ec3..c903625b79 100644
--- a/package.json
+++ b/package.json
@@ -116,7 +116,7 @@
     "rewire": "^2.3.3",
     "rimraf": "^2.2.8",
     "shelljs": "^0.4.0",
-    "sinon": "^1.12.2",
+    "sinon": "1.15.4",
     "sinon-chai": "^2.7.0",
     "superagent": "~0.15.7",
     "superagent-defaults": "~0.1.5",
diff --git a/test/common/algos.mocha.coffee b/test/common/algos.mocha.coffee
index 6dc4f1d25f..5be39a7ae3 100644
--- a/test/common/algos.mocha.coffee
+++ b/test/common/algos.mocha.coffee
@@ -656,7 +656,7 @@ describe 'Cron', ->
     afterTasks = after.habits.concat(after.dailys).concat(after.todos).concat(after.rewards)
     expect(beforeTasks).to.eql afterTasks
 
-  xdescribe 'preening', ->
+  describe 'preening', ->
     beforeEach ->
       @clock = sinon.useFakeTimers(Date.parse("2013-11-20"), "Date")