diff --git a/spec/docile_spec.rb b/spec/docile_spec.rb
index f8c0e90..70454e6 100644
--- a/spec/docile_spec.rb
+++ b/spec/docile_spec.rb
@@ -196,7 +196,7 @@ describe Docile do
 
         it "raises NoMethodError" do
           expect { subject.call(5) }.
-            to raise_error(NoMethodError, /undefined method `at' /)
+            to raise_error(NoMethodError, /method `at' /)
         end
 
         it "removes fallback instrumentation from the DSL object after block" do