diff --git a/test/rake/test_rake_task.rb b/test/rake/test_rake_task.rb
index 2ab995a6ff..3c8eac0da5 100644
--- a/test/rake/test_rake_task.rb
+++ b/test/rake/test_rake_task.rb
@@ -270,7 +270,7 @@ class TestRakeTask < Rake::TestCase
     result = []
 
     t_a = task(:a) do |t|
-      sleep 0.02
+      sleep 0.2
       mx.synchronize { result << t.name }
     end