diff --git a/test/assertions.rb b/test/assertions.rb
index bf30710c..9fab9d69 100644
--- a/test/assertions.rb
+++ b/test/assertions.rb
@@ -1,5 +1,5 @@
 module Assertions
-  def assert_method_visibility(object, method_name, visiblity)
-    assert object.send("#{visiblity}_methods").include?(method_name), "#{method_name} is not #{visiblity}"
+  def assert_method_visibility(object, method_name, visibility)
+    assert object.send("#{visibility}_methods").include?(method_name), "#{method_name} is not #{visibility}"
   end
 end