diff --git a/test/styles_parser_test.rb b/test/styles_parser_test.rb
new file mode 100644
index 0000000..5be61d9
--- /dev/null
+++ b/test/styles_parser_test.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class StylesParserTest < Test::Unit::TestCase
+  context "An attachment with :convert_options" do
+    setup do
+      options = {
+        styles: {
+          thumb: "100x100",
+          large: "400x400"
+        },
+        convert_options: {
+          all: "-do_stuff",
+          thumb: "-thumbnailize"
+        }
+      }
+      @parser = Paperclip::StylesParser.new(options)
+    end
+
+    should "report the correct options when sent #extra_options_for(:thumb)" do
+      assert_equal "-thumbnailize -do_stuff", @parser.extra_options_for(:thumb), @parser.convert_options.inspect
+    end
+
+    should "report the correct options when sent #extra_options_for(:large)" do
+      assert_equal "-do_stuff", @parser.extra_options_for(:large)
+    end
+
+    before_should "call extra_options_for(:thumb/:large)" do
+      Paperclip::StylesParser.any_instance.expects(:extra_options_for).with(:thumb).at_least_once
+      Paperclip::StylesParser.any_instance.expects(:extra_options_for).with(:large).at_least_once
+    end
+  end
+end