diff --git a/test/ipaddress/mongoid_test.rb b/test/ipaddress/mongoid_test.rb
index b463e841ce35e2fa019c0f635fbf5f0c0a9c8166..4f3209305e8e94672db13e3884a4a0b80f439531 100644
--- a/test/ipaddress/mongoid_test.rb
+++ b/test/ipaddress/mongoid_test.rb
@@ -38,7 +38,7 @@ class MongoidTest < Minitest::Test
 
     @invalid_values.each do |invalid_value|
       # Invalid addresses should serialize to nil
-      assert_equal nil, IPAddress.mongoize(invalid_value)
+      assert_nil IPAddress.mongoize(invalid_value)
     end
   end
 
@@ -57,7 +57,7 @@ class MongoidTest < Minitest::Test
 
     @invalid_values.each do |invalid_value|
       # Invalid stored value should be loaded as nil
-      assert_equal nil, IPAddress.demongoize(invalid_value)
+      assert_nil IPAddress.demongoize(invalid_value)
     end
   end
 
@@ -67,4 +67,4 @@ class MongoidTest < Minitest::Test
     assert_equal IPAddress.mongoize(@valid_network4), IPAddress.evolve(@valid_network4)
   end
 
-end
\ No newline at end of file
+end