Add coveralls support properly

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index c7516d0..5f5fb9b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source "http://rubygems.org"
 
-group :development do
+group :development, :test do
   gem 'coveralls', require: false
   gem 'rspec'
   gem 'webmock'