diff --git a/bench/phone_bench.exs b/bench/phone_bench.exs
index d8daddc..8065349 100644
--- a/bench/phone_bench.exs
+++ b/bench/phone_bench.exs
@@ -9,11 +9,23 @@ defmodule PhoneBench do
     {:ok, _result} = Phone.parse(@nanp_phone_number)
   end
 
+  bench "Phone.parse/1 with an NANP phone number error" do
+    {:error, _result} = Phone.parse("1253630123")
+  end
+
   bench "Phone.parse/1 with an Andorra phone number" do
     {:ok, _result} = Phone.parse(@andorra_phone_number)
   end
 
+  bench "Phone.parse/1 with an Andorra phone number error" do
+    {:error, _result} = Phone.parse("37612345")
+  end
+
   bench "Phone.parse/1 with a Zimbabwe phone number" do
     {:ok, _result} = Phone.parse(@zimbabwe_phone_number)
   end
+
+  bench "Phone.parse/1 with a Zimbabwe phone number error" do
+    {:error, _result} = Phone.parse("263")
+  end
 end