diff --git a/sorbet/rbi/shims/test_helper.rbi b/sorbet/rbi/shims/test_helper.rbi
new file mode 100644
index 0000000..739e7a5
--- /dev/null
+++ b/sorbet/rbi/shims/test_helper.rbi
@@ -0,0 +1,2 @@
+def add_filter(*); end
+def enable_coverage(*); end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 4e8438c..493e6e6 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -2,7 +2,10 @@
 # typed: true
 
 require "simplecov"
-SimpleCov.start
+SimpleCov.start do
+  add_filter "/test/"
+  enable_coverage :branch
+end
 
 $LOAD_PATH.unshift File.expand_path("../lib", __dir__)
 require "rubrik"