diff --git a/.rubocop.yml b/.rubocop.yml
index 84c8d1b7..b85e8b99 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -11,7 +11,6 @@ AllCops:
   - lib/jekyll/deprecator.rb
   - lib/jekyll/document.rb
   - lib/jekyll/filters.rb
-  - lib/jekyll/frontmatter_defaults.rb
   - lib/jekyll/regenerator.rb
   - lib/jekyll/renderer.rb
   - lib/jekyll/site.rb
diff --git a/lib/jekyll/frontmatter_defaults.rb b/lib/jekyll/frontmatter_defaults.rb
index 22df50f2..27dab903 100644
--- a/lib/jekyll/frontmatter_defaults.rb
+++ b/lib/jekyll/frontmatter_defaults.rb
@@ -11,37 +11,42 @@ module Jekyll
     end
 
     def update_deprecated_types(set)
-      return set unless set.key?('scope') && set['scope'].key?('type')
+      return set unless set.key?("scope") && set["scope"].key?("type")
 
-      set['scope']['type'] =
-        case set['scope']['type']
-        when 'page'
-          Deprecator.defaults_deprecate_type('page', 'pages')
-          'pages'
-        when 'post'
-          Deprecator.defaults_deprecate_type('post', 'posts')
-          'posts'
-        when 'draft'
-          Deprecator.defaults_deprecate_type('draft', 'drafts')
-          'drafts'
+      set["scope"]["type"] =
+        case set["scope"]["type"]
+        when "page"
+          Deprecator.defaults_deprecate_type("page", "pages")
+          "pages"
+        when "post"
+          Deprecator.defaults_deprecate_type("post", "posts")
+          "posts"
+        when "draft"
+          Deprecator.defaults_deprecate_type("draft", "drafts")
+          "drafts"
         else
-          set['scope']['type']
+          set["scope"]["type"]
         end
 
       set
     end
 
     def ensure_time!(set)
-      return set unless set.key?('values') && set['values'].key?('date')
-      return set if set['values']['date'].is_a?(Time)
-      set['values']['date'] = Utils.parse_date(set['values']['date'], "An invalid date format was found in a front-matter default set: #{set}")
+      return set unless set.key?("values") && set["values"].key?("date")
+      return set if set["values"]["date"].is_a?(Time)
+      set["values"]["date"] = Utils.parse_date(
+        set["values"]["date"],
+        "An invalid date format was found in a front-matter default set: #{set}"
+      )
       set
     end
 
     # Finds a default value for a given setting, filtered by path and type
     #
-    # path - the path (relative to the source) of the page, post or :draft the default is used in
-    # type - a symbol indicating whether a :page, a :post or a :draft calls this method
+    # path - the path (relative to the source) of the page,
+    # post or :draft the default is used in
+    # type - a symbol indicating whether a :page,
+    # a :post or a :draft calls this method
     #
     # Returns the default value or nil if none was found
     def find(path, type, setting)
@@ -49,9 +54,9 @@ module Jekyll
       old_scope = nil
 
       matching_sets(path, type).each do |set|
-        if set['values'].key?(setting) && has_precedence?(old_scope, set['scope'])
-          value = set['values'][setting]
-          old_scope = set['scope']
+        if set["values"].key?(setting) && precedence?(old_scope, set["scope"])
+          value = set["values"][setting]
+          old_scope = set["scope"]
         end
       end
       value
@@ -67,11 +72,11 @@ module Jekyll
       defaults = {}
       old_scope = nil
       matching_sets(path, type).each do |set|
-        if has_precedence?(old_scope, set['scope'])
-          defaults = Utils.deep_merge_hashes(defaults, set['values'])
-          old_scope = set['scope']
+        if precedence?(old_scope, set["scope"])
+          defaults = Utils.deep_merge_hashes(defaults, set["values"])
+          old_scope = set["scope"]
         else
-          defaults = Utils.deep_merge_hashes(set['values'], defaults)
+          defaults = Utils.deep_merge_hashes(set["values"], defaults)
         end
       end
       defaults
@@ -91,9 +96,9 @@ module Jekyll
     end
 
     def applies_path?(scope, path)
-      return true if !scope.key?('path') || scope['path'].empty?
+      return true if !scope.key?("path") || scope["path"].empty?
 
-      scope_path = Pathname.new(scope['path'])
+      scope_path = Pathname.new(scope["path"])
       Pathname.new(sanitize_path(path)).ascend do |ascended_path|
         if ascended_path.to_s == scope_path.to_s
           return true
@@ -113,7 +118,7 @@ module Jekyll
     # Returns true if either of the above conditions are satisfied,
     #   otherwise returns false
     def applies_type?(scope, type)
-      !scope.key?('type') || scope['type'].eql?(type.to_s)
+      !scope.key?("type") || scope["type"].eql?(type.to_s)
     end
 
     # Checks if a given set of default values is valid
@@ -122,7 +127,7 @@ module Jekyll
     #
     # Returns true if the set is valid and can be used in this class
     def valid?(set)
-      set.is_a?(Hash) && set['values'].is_a?(Hash)
+      set.is_a?(Hash) && set["values"].is_a?(Hash)
     end
 
     # Determines if a new scope has precedence over an old one
@@ -131,18 +136,18 @@ module Jekyll
     # new_scope - the new scope hash
     #
     # Returns true if the new scope has precedence over the older
-    def has_precedence?(old_scope, new_scope)
+    def precedence?(old_scope, new_scope)
       return true if old_scope.nil?
 
-      new_path = sanitize_path(new_scope['path'])
-      old_path = sanitize_path(old_scope['path'])
+      new_path = sanitize_path(new_scope["path"])
+      old_path = sanitize_path(old_scope["path"])
 
       if new_path.length != old_path.length
         new_path.length >= old_path.length
-      elsif new_scope.key? 'type'
+      elsif new_scope.key? "type"
         true
       else
-        !old_scope.key? 'type'
+        !old_scope.key? "type"
       end
     end
 
@@ -151,7 +156,7 @@ module Jekyll
     # Returns an array of hashes
     def matching_sets(path, type)
       valid_sets.select do |set|
-        !set.key?('scope') || applies?(set['scope'], path, type)
+        !set.key?("scope") || applies?(set["scope"], path, type)
       end
     end
 
@@ -162,7 +167,7 @@ module Jekyll
     #
     # Returns an array of hashes
     def valid_sets
-      sets = @site.config['defaults']
+      sets = @site.config["defaults"]
       return [] unless sets.is_a?(Array)
 
       sets.map do |set|
@@ -170,7 +175,7 @@ module Jekyll
           ensure_time!(update_deprecated_types(set))
         else
           Jekyll.logger.warn "Defaults:", "An invalid front-matter default set was found:"
-          Jekyll.logger.warn "#{set}"
+          Jekyll.logger.warn set.to_s
           nil
         end
       end.compact
@@ -181,7 +186,7 @@ module Jekyll
       if path.nil? || path.empty?
         ""
       else
-        path.gsub(/\A\//, '').gsub(/([^\/])\z/, '\1')
+        path.gsub(%r!\A/!, "").gsub(%r!([^/])\z!, '\1')
       end
     end
   end