diff --git a/lib/time.js b/lib/time.js
index 2f3c6c30..2ccd0390 100644
--- a/lib/time.js
+++ b/lib/time.js
@@ -140,7 +140,7 @@ function timeoutPromise (timeout) {
     // if no timeout is specified, never settle
     if (!timeout) return
 
-    setTimeout(() => reject(new Error(`timeout after ${timeout / 1000}s`)), timeout)
+    setTimeout(() => reject(new TimeoutError(timeout)), timeout)
   })
 }