Updating tests to better follow Rails convention

Author: ron-shinall

Rakefile

@@ -14,5 +14,5 @@ task default: %i[test standard]
 Rake::TestTask.new(:test) do |t|
   t.libs << "test"
   t.libs << "lib"
-  t.test_files = FileList["test/**/test_*.rb"]
+  t.test_files = FileList["test/**/*_test.rb"]
 end