diff --git a/Rakefile b/Rakefile
index 07cdfd9..d327fa3 100644
--- a/Rakefile
+++ b/Rakefile
@@ -9,6 +9,7 @@ require 'rake/minify'
 require 'time'
 require 'yaml'
 require 'octopress'
+require 'rake/testtask'
 
 ### Configuring Octopress:
 ###   Under _config/ you will find:
@@ -525,3 +526,7 @@ task :list do
   puts "Tasks: #{(Rake::Task.tasks - [Rake::Task[:list]]).join(', ')}"
   puts "(type rake -T for more detail)\n\n"
 end
+
+Rake::TestTask.new do |t|
+  t.pattern = "spec/**/*_spec.rb"
+end
diff --git a/lib/octopress/configuration.rb b/lib/octopress/configuration.rb
index 48c0bf5..0e0034c 100644
--- a/lib/octopress/configuration.rb
+++ b/lib/octopress/configuration.rb
@@ -2,8 +2,10 @@ require 'yaml'
 
 module Octopress
   module Configuration
+    CONFIG_DIR = File.join(File.dirname(__FILE__), '../', '../' '_config')
+
     def self.config_dir(*subdirs)
-      File.absolute_path(File.join(File.dirname(__FILE__), '../', '../' '_config', *subdirs))
+      File.absolute_path(File.join(CONFIG_DIR, *subdirs))
     end
 
     # Static: Reads the configuration of the specified file
diff --git a/spec/fixtures/no_override/defaults/classic.yml b/spec/fixtures/no_override/defaults/classic.yml
new file mode 100644
index 0000000..1e586e7
--- /dev/null
+++ b/spec/fixtures/no_override/defaults/classic.yml
@@ -0,0 +1,11 @@
+---
+# ------------------------------- #
+#   Classic Theme Configuration   #
+# ------------------------------- #
+
+url: http://yoursite.com
+title: My Octopress Blog
+subtitle: A blogging framework for hackers.
+author: Your Name
+simple_search: http://google.com/search
+description:
diff --git a/spec/fixtures/override/defaults/classic.yml b/spec/fixtures/override/defaults/classic.yml
new file mode 100644
index 0000000..1e586e7
--- /dev/null
+++ b/spec/fixtures/override/defaults/classic.yml
@@ -0,0 +1,11 @@
+---
+# ------------------------------- #
+#   Classic Theme Configuration   #
+# ------------------------------- #
+
+url: http://yoursite.com
+title: My Octopress Blog
+subtitle: A blogging framework for hackers.
+author: Your Name
+simple_search: http://google.com/search
+description:
diff --git a/spec/fixtures/override/site.yml b/spec/fixtures/override/site.yml
new file mode 100644
index 0000000..83b9e6b
--- /dev/null
+++ b/spec/fixtures/override/site.yml
@@ -0,0 +1,11 @@
+---
+# ------------------------------- #
+#   Classic Theme Configuration   #
+# ------------------------------- #
+
+url: http://myownsite.com
+title: My Octopress custom Blog
+subtitle: "How did this get here? I'm not good with computers"
+author: John Doe
+simple_search: http://google.com/search
+description:
diff --git a/spec/octopress/configuration_spec.rb b/spec/octopress/configuration_spec.rb
new file mode 100644
index 0000000..59b4b0f
--- /dev/null
+++ b/spec/octopress/configuration_spec.rb
@@ -0,0 +1,42 @@
+require 'minitest/autorun'
+require_relative '../../lib/octopress'
+
+describe Octopress::Configuration do
+  describe '.read_configuration' do
+    subject do
+      Octopress::Configuration.read_configuration
+    end
+
+    describe "when no override" do
+      before do
+        Octopress::Configuration::CONFIG_DIR = File.join(File.dirname(__FILE__), '../', 'fixtures', 'no_override')
+      end
+
+      it "returns the default config with keys as symbols" do
+        expected_config = { :url           => "http://yoursite.com",
+                            :title         => "My Octopress Blog",
+                            :subtitle      => "A blogging framework for hackers.",
+                            :author        => "Your Name",
+                            :simple_search => "http://google.com/search",
+                            :description   => nil }
+        subject.must_equal expected_config
+      end
+    end
+
+    describe "when override" do
+      before do
+        Octopress::Configuration::CONFIG_DIR = File.join(File.dirname(__FILE__), '../', 'fixtures', 'override')
+      end
+
+      it "returns the default config with keys as symbols" do
+        expected_config = { :url           => "http://myownsite.com",
+                            :title         => "My Octopress custom Blog",
+                            :subtitle      => "How did this get here? I'm not good with computers",
+                            :author        => "John Doe",
+                            :simple_search => "http://google.com/search",
+                            :description   => nil }
+        subject.must_equal expected_config
+      end
+    end
+  end
+end