diff --git a/lib/jekyll/plugin_manager.rb b/lib/jekyll/plugin_manager.rb
index d4ad9951..502c4a73 100644
--- a/lib/jekyll/plugin_manager.rb
+++ b/lib/jekyll/plugin_manager.rb
@@ -76,7 +76,7 @@ module Jekyll
     #
     # Returns an Array of plugin search paths
     def plugins_path
-      if (site.config['plugins_dir'] == Jekyll::Configuration::DEFAULTS['plugins_dir'])
+      if site.config['plugins_dir'] == Jekyll::Configuration::DEFAULTS['plugins_dir']
         [site.in_source_dir(site.config['plugins_dir'])]
       else
         Array(site.config['plugins_dir']).map { |d| File.expand_path(d) }
diff --git a/lib/jekyll/regenerator.rb b/lib/jekyll/regenerator.rb
index bb9284aa..20522350 100644
--- a/lib/jekyll/regenerator.rb
+++ b/lib/jekyll/regenerator.rb
@@ -115,7 +115,7 @@ module Jekyll
     #
     # Returns nothing.
     def add_dependency(path, dependency)
-      return if (metadata[path].nil? || @disabled)
+      return if metadata[path].nil? || @disabled
 
       unless metadata[path]["deps"].include? dependency
         metadata[path]["deps"] << dependency
diff --git a/lib/jekyll/utils.rb b/lib/jekyll/utils.rb
index 1d81e0f0..6b6e8f1c 100644
--- a/lib/jekyll/utils.rb
+++ b/lib/jekyll/utils.rb
@@ -62,7 +62,7 @@ module Jekyll
     end
 
     def value_from_singular_key(hash, key)
-      hash[key] if (hash.key?(key) || (hash.default_proc && hash[key]))
+      hash[key] if hash.key?(key) || (hash.default_proc && hash[key])
     end
 
     def value_from_plural_key(hash, key)