diff --git a/Rakefile b/Rakefile
index f1778b4..2367e4b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -58,11 +58,12 @@ task :generate_test_gem => ['engine_cart:setup'] do
 
     system "echo '\ngem \"rspec-rails\"\n' >> Gemfile"
 
-    Bundler.clean_system "bundle update --quiet"
+    Bundler.unbundled_system "bundle update --quiet"
+
     system "echo 'require \"engine_cart/rake_task\"\n' >> Rakefile"
 
     system("bundle exec rake engine_cart:prepare")
-    Bundler.clean_system "bundle install --quiet"
+    Bundler.unbundled_system "bundle install --quiet"
   end
 end
 
diff --git a/lib/engine_cart/tasks/engine_cart.rake b/lib/engine_cart/tasks/engine_cart.rake
index 730c142..61e35a5 100644
--- a/lib/engine_cart/tasks/engine_cart.rake
+++ b/lib/engine_cart/tasks/engine_cart.rake
@@ -108,7 +108,7 @@ namespace :engine_cart do
 
       # Copy our test app generators into the app and prepare it
       if File.exist? "#{EngineCart.templates_path}/lib/generators"
-        Bundler.clean_system "cp -r #{EngineCart.templates_path}/lib/generators #{EngineCart.destination}/lib"
+        Bundler.unbundled_system "cp -r #{EngineCart.templates_path}/lib/generators #{EngineCart.destination}/lib"
       end
 
       within_test_app do
@@ -120,7 +120,7 @@ namespace :engine_cart do
         end
       end
 
-      Bundler.clean_system "bundle install --quiet"
+      Bundler.unbundled_system "bundle install --quiet"
 
       EngineCart.write_fingerprint