diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 31602c8..a8414d6 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,12 @@
 # frozen_string_literal: true
 
 require 'simplecov'
-SimpleCov.start
+
+SimpleCov.start do
+  enable_coverage :branch
+  primary_coverage :branch
+end
+
 require 'polariscope'
 require 'pry'