diff --git a/spec/common/misc/throttle.spec.ts b/spec/common/misc/throttle.spec.ts
index d35d13f9e1..f7a273a6f9 100644
--- a/spec/common/misc/throttle.spec.ts
+++ b/spec/common/misc/throttle.spec.ts
@@ -94,6 +94,7 @@ class Foo {
         });
     }
 
+    @sequentialize((args) => 'qux' + args[0])
     @throttle(1, () => 'qux')
     qux(a: number) {
         this.calls++;