diff --git a/protocol/minmax_test.go b/protocol/minmax_test.go
index 1cfbcabaf..c1cfc9338 100644
--- a/protocol/minmax_test.go
+++ b/protocol/minmax_test.go
@@ -9,9 +9,11 @@ import (
 var _ = Describe("minmax", func() {
 	It("calculates packet number max", func() {
 		Expect(protocol.MaxPacketNumber(1, 2)).To(Equal(protocol.PacketNumber(2)))
+		Expect(protocol.MaxPacketNumber(2, 1)).To(Equal(protocol.PacketNumber(2)))
 	})
 
 	It("calculates packet number min", func() {
 		Expect(protocol.MinPacketNumber(1, 2)).To(Equal(protocol.PacketNumber(1)))
+		Expect(protocol.MinPacketNumber(2, 1)).To(Equal(protocol.PacketNumber(1)))
 	})
 })