diff --git a/lib/appraisal/appraisal.rb b/lib/appraisal/appraisal.rb
index 657202ca..a59f5c54 100644
--- a/lib/appraisal/appraisal.rb
+++ b/lib/appraisal/appraisal.rb
@@ -37,7 +37,8 @@ def gemfile_path
     end
 
     def bundle_command
-      "bundle install --gemfile='#{gemfile_path}'"
+      gemfile = "--gemfile='#{gemfile_path}'"
+      "bundle check #{gemfile} || bundle install #{gemfile}"
     end
 
     private
diff --git a/spec/appraisal/appraisal_spec.rb b/spec/appraisal/appraisal_spec.rb
index 2f2e05de..07d751f6 100644
--- a/spec/appraisal/appraisal_spec.rb
+++ b/spec/appraisal/appraisal_spec.rb
@@ -6,7 +6,7 @@
     appraisal = Appraisal::Appraisal.new('fake', 'fake')
     appraisal.stub(:gemfile_path).and_return("/home/test/test directory")
 
-    appraisal.bundle_command.should == "bundle install --gemfile='/home/test/test directory'"
+    appraisal.bundle_command.should == "bundle check --gemfile='/home/test/test directory' || bundle install --gemfile='/home/test/test directory'"
   end
 
   it "cleans up spaces and punctuation when outputting its gemfile" do