diff --git a/spec/cron_spec.rb b/spec/cron_spec.rb
index <HASH>..<HASH> 100644
--- a/spec/cron_spec.rb
+++ b/spec/cron_spec.rb
@@ -22,6 +22,11 @@ describe Fugit::Cron do
     [ '0 0 1 1 *', '2018-01-01 00:00:00' ],
     [ '* * 29 * *', '2017-01-29 00:00:00' ],
     [ '* * 29 * *', '2016-02-29 00:00:00', '2016-02-01' ],
+    [ '* * L * *', '2016-02-29 00:00:00', '2016-02-01' ],
+    [ '* * last * *', '2016-02-29 00:00:00', '2016-02-01' ],
+    [ '* * -1 * *', '2016-02-29 00:00:00', '2016-02-01' ],
+    [ '0 0 -4,-3 * *', '2016-02-26 00:00:00', '2016-02-01' ],
+    [ '0 0 -4,-3 * *', '2016-02-27 00:00:00', '2016-02-26 12:00' ],
 
     [ '* * * * sun', '2017-01-8' ],
Add specs for negative/last day of month