diff --git a/lib/test.js b/lib/test.js
index f417034de..ad86c1c4f 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -278,7 +278,7 @@ class Test {
 	}
 
 	clearTimeout() {
-		clearTimeout(this.timeoutTimer);
+		nowAndTimers.clearTimeout(this.timeoutTimer);
 		this.timeoutTimer = null;
 	}