diff --git a/.gitignore b/.gitignore
index e941c6e..cfd315e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 .config
 .yardoc
 Gemfile.lock
+NoGecode.gemfile.lock
 InstalledFiles
 _yardoc
 coverage
diff --git a/Gemfile b/Gemfile
index 34eaa39..2885897 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,10 @@ group :gecode do
   gem "dep_selector", "~> 1.0"
 end
 
-group :development do
+# If this group is named "development", then `bundle install --without
+# development` automagically excludes development dependencies that are listed
+# in the gemspec, which will skip installing rspec and then we can't run tests.
+group :dev do
   gem 'fuubar'
   gem 'yard'
   gem 'redcarpet'
@@ -28,10 +31,3 @@ group :development do
   end
 end
 
-group :test do
-  gem 'thor', '>= 0.16.0'
-  gem 'rake', '>= 0.9.2.2'
-
-  gem 'spork'
-  gem 'rspec'
-end
diff --git a/NoGecode.gemfile b/NoGecode.gemfile
new file mode 100644
index 0000000..9e9ddcc
--- /dev/null
+++ b/NoGecode.gemfile
@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gemspec
+
diff --git a/Thorfile b/Thorfile
index 37dedf1..35f8080 100644
--- a/Thorfile
+++ b/Thorfile
@@ -28,4 +28,9 @@ class Default < Thor
   def spec
     exec "rspec --color --format=documentation spec"
   end
+
+  desc "spec", "Run RSpec code examples"
+  def nogecode_spec
+    exec "rspec -t '~gecode' --color --format=documentation spec"
+  end
 end
diff --git a/spec/acceptance/solutions_spec.rb b/spec/acceptance/solutions_spec.rb
index 31aba95..9961586 100644
--- a/spec/acceptance/solutions_spec.rb
+++ b/spec/acceptance/solutions_spec.rb
@@ -1,6 +1,6 @@
 require 'spec_helper'
 
-describe "Solutions" do
+describe "Solutions", :gecode do
 
   before do
     Solve.engine = :gecode