diff --git a/spec/commands_spec.rb b/spec/commands_spec.rb
index 0e071af..4c5be22 100644
--- a/spec/commands_spec.rb
+++ b/spec/commands_spec.rb
@@ -166,6 +166,7 @@
       sj = SugarJar::Commands.new(
         { 'no_change' => true, 'feature_prefix' => 'someuser/' },
       )
+      expect(sj).to receive(:all_local_branches).and_return(['/nonexistent'])
       expect(sj.send(:fprefix, 'test')).to eq('someuser/test')
     end