diff --git a/spec/integration/maybe_spec.rb b/spec/integration/maybe_spec.rb
index 769fb04..2112c59 100644
--- a/spec/integration/maybe_spec.rb
+++ b/spec/integration/maybe_spec.rb
@@ -16,7 +16,7 @@
 
       it "returns a new instance" do
         expect(none).to eql(None())
-        expect(none.trace).to match(%r{rspec/integration/maybe_spec.rb:9:in `|'block})
+        expect(none.trace).to match(%r{spec/integration/maybe_spec.rb:9:in (`|')block})
       end
     end