diff --git a/.rubocop.yml b/.rubocop.yml
index 588e630c..b6e5b25a 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -71,7 +71,6 @@ AllCops:
   - features/support/formatter.rb
   - features/support/helpers.rb
   - test/test_configuration.rb
-  - test/test_convertible.rb
   - test/test_doctor_command.rb
   - test/test_document.rb
   - test/test_entry_filter.rb
diff --git a/test/test_convertible.rb b/test/test_convertible.rb
index 517f5c3b..4509ed36 100644
--- a/test/test_convertible.rb
+++ b/test/test_convertible.rb
@@ -1,30 +1,30 @@
-require 'helper'
-require 'ostruct'
+require "helper"
+require "ostruct"
 
 class TestConvertible < JekyllUnitTest
   context "yaml front-matter" do
     setup do
       @convertible = OpenStruct.new(
         "site" => Site.new(Jekyll.configuration(
-          "source" => File.expand_path('../fixtures', __FILE__)
+          "source" => File.expand_path("../fixtures", __FILE__)
         ))
       )
       @convertible.extend Jekyll::Convertible
-      @base = File.expand_path('../fixtures', __FILE__)
+      @base = File.expand_path("../fixtures", __FILE__)
     end
 
     should "parse the front-matter correctly" do
-      ret = @convertible.read_yaml(@base, 'front_matter.erb')
-      assert_equal({'test' => 'good'}, ret)
+      ret = @convertible.read_yaml(@base, "front_matter.erb")
+      assert_equal({ "test" => "good" }, ret)
     end
 
     should "not parse if the front-matter is not at the start of the file" do
-      ret = @convertible.read_yaml(@base, 'broken_front_matter1.erb')
+      ret = @convertible.read_yaml(@base, "broken_front_matter1.erb")
       assert_equal({}, ret)
     end
 
     should "not parse if there is syntax error in front-matter" do
-      name = 'broken_front_matter2.erb'
+      name = "broken_front_matter2.erb"
       out = capture_stderr do
         ret = @convertible.read_yaml(@base, name)
         assert_equal({}, ret)
@@ -35,15 +35,15 @@ class TestConvertible < JekyllUnitTest
 
     should "not allow ruby objects in yaml" do
       out = capture_stderr do
-        @convertible.read_yaml(@base, 'exploit_front_matter.erb')
+        @convertible.read_yaml(@base, "exploit_front_matter.erb")
       end
-      refute_match(/undefined class\/module DoesNotExist/, out)
+      refute_match(%r!undefined class\/module DoesNotExist!, out)
     end
 
     should "not parse if there is encoding error in file" do
-      name = 'broken_front_matter3.erb'
+      name = "broken_front_matter3.erb"
       out = capture_stderr do
-        ret = @convertible.read_yaml(@base, name, :encoding => 'utf-8')
+        ret = @convertible.read_yaml(@base, name, :encoding => "utf-8")
         assert_equal({}, ret)
       end
       assert_match(/invalid byte sequence in UTF-8/, out)
@@ -51,7 +51,7 @@ class TestConvertible < JekyllUnitTest
     end
 
     should "parse the front-matter but show an error if permalink is empty" do
-      name = 'empty_permalink.erb'
+      name = "empty_permalink.erb"
       assert_raises(Errors::InvalidPermalinkError) do
         @convertible.read_yaml(@base, name)
       end
@@ -59,7 +59,7 @@ class TestConvertible < JekyllUnitTest
 
     should "parse the front-matter correctly whitout permalink" do
       out = capture_stderr do
-        @convertible.read_yaml(@base, 'front_matter.erb')
+        @convertible.read_yaml(@base, "front_matter.erb")
       end
       refute_match(/Invalid permalink/, out)
     end