From 32adae431d3f58e4103ca7ea507ee110c18e19c4 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Thu, 6 Feb 2020 15:40:34 +0900
Subject: [PATCH] [ruby/spec] Just test that sleep completes

---
 spec/ruby/core/mutex/sleep_spec.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spec/ruby/core/mutex/sleep_spec.rb b/spec/ruby/core/mutex/sleep_spec.rb
index 6638f5a5a2..9832e3125e 100644
--- a/spec/ruby/core/mutex/sleep_spec.rb
+++ b/spec/ruby/core/mutex/sleep_spec.rb
@@ -97,7 +97,7 @@ describe "Mutex#sleep" do
     m.lock
     times.each do |time|
       # just testing that sleep completes
-      m.sleep(time).should_not == nil
+      -> {m.sleep(time)}.should_not raise_error
     end
   end
 end