diff --git a/test/credo/check/readability/string_sigils_test.exs b/test/credo/check/readability/string_sigils_test.exs
index e8f9ebe4f..5cf659ba6 100644
--- a/test/credo/check/readability/string_sigils_test.exs
+++ b/test/credo/check/readability/string_sigils_test.exs
@@ -99,6 +99,7 @@ defmodule Credo.Check.Readability.StringSigilsTest do
     "foo": "bar"
     }
     \"\"\"
+    |> Jason.decode!
     """
     |> to_source_file
     |> refute_issues(@described_check)