--- a/spec/homesick_cli_spec.rb
+++ b/spec/homesick_cli_spec.rb
@@ -14,6 +14,8 @@
   before { allow(homesick).to receive(:repos_dir).and_return(castles) }
 
   describe 'smoke tests' do
+    ENV['LC_MESSAGES'] = 'C'
+
     context 'when running bin/homesick' do
       before do
         bin_path = Pathname.new(__FILE__).parent.parent