diff --git a/guides/source/debugging_rails_applications.md b/guides/source/debugging_rails_applications.md
index 5f738b76af..c1f26c2a5e 100644
--- a/guides/source/debugging_rails_applications.md
+++ b/guides/source/debugging_rails_applications.md
@@ -159,10 +159,10 @@ class ArticlesController < ApplicationController
   def create
     @article = Article.new(params[:article])
     logger.debug "New article: #{@article.attributes.inspect}"
-    logger.debug  Article should be valid: #{@article.valid?}"
+    logger.debug "Article should be valid: #{@article.valid?}"
 
     if @article.save
-      flash[:notice] =  Article was successfully created.'
+      flash[:notice] =  'Article was successfully created.'
       logger.debug "The article was saved and now the user is going to be redirected..."
       redirect_to(@article)
     else
@@ -184,7 +184,8 @@ vbkNvbnRyb2xsZXI6OkZsYXNoOjpGbGFzaEhhc2h7AAY6CkB1c2VkewA=--b18cd92fba90eacf8137e
  "body"=>"I'm learning how to print in logs!!!", "published"=>"0"},
  "authenticity_token"=>"2059c1286e93402e389127b1153204e0d1e275dd", "action"=>"create", "controller"=>"articles"}
 New article: {"updated_at"=>nil, "title"=>"Debugging Rails", "body"=>"I'm learning how to print in logs!!!",
- "published"=>false, "created_at"=>nil} Article should be valid: true
+ "published"=>false, "created_at"=>nil}
+Article should be valid: true
   Article Create (0.000443)   INSERT INTO "articles" ("updated_at", "title", "body", "published",
  "created_at") VALUES('2008-09-08 14:52:54', 'Debugging Rails',
  'I''m learning how to print in logs!!!', 'f', '2008-09-08 14:52:54')
diff --git a/guides/source/engines.md b/guides/source/engines.md
index 3145733d4c..e630e3d93b 100644
--- a/guides/source/engines.md
+++ b/guides/source/engines.md
@@ -394,7 +394,7 @@ end
 ```
 
 This helps prevent conflicts with any other engine or application that may have
-a article resource as well.
+an article resource as well.
 
 Finally, the assets for this resource are generated in two files:
 `app/assets/javascripts/blorgh/articles.js` and
@@ -506,8 +506,8 @@ NOTE: Because the `has_many` is defined inside a class that is inside the
 model for these objects, so there's no need to specify that using the
 `:class_name` option here.
 
-Next, there needs to be a form so that comments can be created on a article. To add
-this, put this line underneath the call to `render @article.comments` in
+Next, there needs to be a form so that comments can be created on an article. To
+add this, put this line underneath the call to `render @article.comments` in
 `app/views/blorgh/articles/show.html.erb`:
 
 ```erb
@@ -739,9 +739,10 @@ the application. In the case of the `blorgh` engine, making articles and comment
 have authors would make a lot of sense.
 
 A typical application might have a `User` class that would be used to represent
-authors for a article or a comment. But there could be a case where the application
-calls this class something different, such as `Person`. For this reason, the
-engine should not hardcode associations specifically for a `User` class.
+authors for an article or a comment. But there could be a case where the
+application calls this class something different, such as `Person`. For this
+reason, the engine should not hardcode associations specifically for a `User`
+class.
 
 To keep it simple in this case, the application will have a class called `User`
 that represents the users of the application. It can be generated using this
diff --git a/guides/source/testing.md b/guides/source/testing.md
index c01b2e575a..a55466341a 100644
--- a/guides/source/testing.md
+++ b/guides/source/testing.md
@@ -585,7 +585,7 @@ Here's another example that uses `flash`, `assert_redirected_to`, and `assert_di
 
 ```ruby
 test "should create article" do
-  assert_difference('article.count') do
+  assert_difference('Article.count') do
     post :create, article: {title: 'Hi', body: 'This is my first article.'}
   end
   assert_redirected_to article_path(assigns(:article))