diff --git a/test/helpers/index.js b/test/helpers/index.js
index 114fa77..0165616 100644
--- a/test/helpers/index.js
+++ b/test/helpers/index.js
@@ -1,6 +1,10 @@
+/* global Bare */
+
 const nil = new Int32Array(new SharedArrayBuffer(4))
 
-exports.isAround = function isAround (actual, expected, epsilon = 10) {
+const isWindows = Bare.platform === 'win32'
+
+exports.isAround = function isAround (actual, expected, epsilon = isWindows ? 50 : 25) {
   return Math.abs(actual - expected) < epsilon
 }
 
diff --git a/test/timeout.js b/test/timeout.js
index 7f89e18..cb95ac5 100644
--- a/test/timeout.js
+++ b/test/timeout.js
@@ -30,7 +30,7 @@ test('setTimeout refresh', async function (t) {
 
   const timer = timers.setTimeout(function () {
     t.is(ticks, 6, 'was refreshed')
-    t.ok(isAround(Date.now() - started, 200), 'timers took ' + Math.abs(Date.now() - started) + 'ms')
+    t.ok(isAround(Date.now() - started, 200, 100), 'timers took ' + Math.abs(Date.now() - started) + 'ms')
   }, 50)
 
   let ticks = 0