diff --git a/activesupport/test/file_update_checker_test.rb b/activesupport/test/file_update_checker_test.rb
index 9d5417b70c..bd1df0f858 100644
--- a/activesupport/test/file_update_checker_test.rb
+++ b/activesupport/test/file_update_checker_test.rb
@@ -50,12 +50,13 @@ class FileUpdateCheckerWithEnumerableTest < ActiveSupport::TestCase
 
   def test_should_be_robust_to_handle_files_with_wrong_modified_time
     i = 0
-    time = 1.year.from_now # wrong mtime from the future
+    now = Time.now
+    time = Time.mktime(now.year + 1, now.month, now.day) # wrong mtime from the future
     File.utime time, time, FILES[2]
 
     checker = ActiveSupport::FileUpdateChecker.new(FILES){ i += 1 }
 
-    sleep(0.1)
+    sleep(1)
     FileUtils.touch(FILES[0..1])
 
     assert checker.execute_if_updated