diff --git a/api/tests/test-mount.js b/api/tests/test-mount.js
index 97358e76..5a376de1 100644
--- a/api/tests/test-mount.js
+++ b/api/tests/test-mount.js
@@ -7,7 +7,7 @@ var m = require("../../render/hyperscript")
 var apiMounter = require("../../api/mount")
 
 o.spec("m.mount", function() {
-	var FRAME_BUDGET = 1000 / 60
+	var FRAME_BUDGET = Math.floor(1000 / 60)
 	var $window, root, mount, renderers
 	
 	o.beforeEach(function() {
diff --git a/api/tests/test-router.js b/api/tests/test-router.js
index deb2fec1..6f10a136 100644
--- a/api/tests/test-router.js
+++ b/api/tests/test-router.js
@@ -8,7 +8,7 @@ var m = require("../../render/hyperscript")
 var apiRouter = require("../../api/router")
 
 o.spec("m.route", function() {
-	var FRAME_BUDGET = 1000 / 60
+	var FRAME_BUDGET = Math.floor(1000 / 60)
 	var $window, root, route, renderers
 	
 	o.beforeEach(function() {
diff --git a/api/tests/test-throttle.js b/api/tests/test-throttle.js
index 627952cd..924bc1c0 100644
--- a/api/tests/test-throttle.js
+++ b/api/tests/test-throttle.js
@@ -5,7 +5,7 @@ var callAsync = require("../../test-utils/callAsync")
 var throttle = require("../../api/throttle")
 
 o.spec("throttle", function() {
-	var FRAME_BUDGET = 1000 / 60
+	var FRAME_BUDGET = Math.floor(1000 / 60)
 	var spy, throttled
 	o.beforeEach(function() {
 		spy = o.spy()