diff --git a/_plugins/jekyll-topic-filter.rb b/_plugins/jekyll-topic-filter.rb
index ee1603db493ce8..7a8df2f121aebb 100644
--- a/_plugins/jekyll-topic-filter.rb
+++ b/_plugins/jekyll-topic-filter.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'json'
 require 'yaml'
 require './_plugins/gtn'
@@ -972,8 +973,8 @@ def to_material(site, page)
     end
 
     def get_workflow(site, page, workflow)
-      mat = self.to_material(site, page)
-      mat['workflows'].select{|w| w['workflow'] == workflow }[0]
+      mat = to_material(site, page)
+      mat['workflows'].select { |w| w['workflow'] == workflow }[0]
     end
   end
 end
diff --git a/_plugins_dev/api-fake.rb b/_plugins_dev/api-fake.rb
index d71a507b7e41e8..7ccb492ba59804 100644
--- a/_plugins_dev/api-fake.rb
+++ b/_plugins_dev/api-fake.rb
@@ -2,10 +2,8 @@
 
 module Jekyll
   class APIGenerator < Generator
-
-    def generate(site)
-      puts "[GTN/API] Disabled"
+    def generate(_site)
+      puts '[GTN/API] Disabled'
     end
   end
 end
-
diff --git a/_plugins_dev/notebook.rb b/_plugins_dev/notebook.rb
index e040caf409fd21..771e4a06e9e1fd 100644
--- a/_plugins_dev/notebook.rb
+++ b/_plugins_dev/notebook.rb
@@ -1,21 +1,21 @@
-def jupyter_pre_render(site)
+def jupyter_pre_render(_site)
   nil
 end
 
-def jupyter_post_write(site)
+def jupyter_post_write(_site)
   nil
 end
 
 module Jekyll
   class RmarkdownGenerator < Generator
-    def generate(site)
-      puts "Notebooks disabled"
+    def generate(_site)
+      puts 'Notebooks disabled'
     end
   end
 
   class JupyterNotebookGenerator < Generator
-    def generate(site)
-      puts "Notebooks disabled"
+    def generate(_site)
+      puts 'Notebooks disabled'
     end
   end
 end
diff --git a/_plugins_dev/sitemap-fake.rb b/_plugins_dev/sitemap-fake.rb
index 55665f47eb2284..1fde44ac368599 100644
--- a/_plugins_dev/sitemap-fake.rb
+++ b/_plugins_dev/sitemap-fake.rb
@@ -7,15 +7,14 @@ def generate(site)
       result += '<!-- This sitemap has FAKE modification dates intentionally, that step is slow. -->'
       result += '<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">'
 
-      site.pages.each {|t|
+      site.pages.each do |t|
         result += "<url><loc>#{site.config['url'] + site.config['baseurl'] + t.url}</loc><lastmod>2016-06-30T18:00:00-07:00</lastmod></url>"
-      }
-      result += "</urlset>"
+      end
+      result += '</urlset>'
 
-      page2 = PageWithoutAFile.new(site, "", '.', "sitemap.xml")
+      page2 = PageWithoutAFile.new(site, '', '.', 'sitemap.xml')
       page2.content = result
       site.pages << page2
     end
   end
 end
-