diff --git a/test/SILGen/mangling_predates_concurrency.swift b/test/SILGen/mangling_predates_concurrency.swift
index 65e5edfc1a95e..b76e0112094f0 100644
--- a/test/SILGen/mangling_predates_concurrency.swift
+++ b/test/SILGen/mangling_predates_concurrency.swift
@@ -1,4 +1,5 @@
 // RUN: %target-swift-emit-silgen %s | %FileCheck %s
+// REQUIRES: concurrency
 
 
 // CHECK: sil [ossa] @$s29mangling_predates_concurrency16excitingFunction5value4bodyyycx_yycSgtlF : $@convention(thin) <T where T : Sendable> (@in_guaranteed T, @guaranteed Optional<@Sendable @callee_guaranteed () -> ()>) -> @owned @callee_guaranteed () -> ()