diff --git a/lib/kennel/api.rb b/lib/kennel/api.rb
index 194dcedb..607dd341 100644
--- a/lib/kennel/api.rb
+++ b/lib/kennel/api.rb
@@ -18,7 +18,7 @@ def self.tag(api_resource, reply)
     def initialize(app_key = nil, api_key = nil)
       @app_key = app_key || ENV.fetch("DATADOG_APP_KEY")
       @api_key = api_key || ENV.fetch("DATADOG_API_KEY")
-      url = Utils.path_to_url("", subdomain: "app")
+      url = Utils.path_to_url("")
       @client = Faraday.new(url: url) { |c| c.adapter :net_http_persistent }
     end
 
diff --git a/lib/kennel/utils.rb b/lib/kennel/utils.rb
index 1fc7ef65..0f219c72 100644
--- a/lib/kennel/utils.rb
+++ b/lib/kennel/utils.rb
@@ -12,8 +12,8 @@ def capture_sh(command)
         result
       end
 
-      def path_to_url(path, subdomain: nil)
-        subdomain ||= (ENV["DATADOG_SUBDOMAIN"] || "app")
+      def path_to_url(path)
+        subdomain = (ENV["DATADOG_SUBDOMAIN"] || "app")
         "https://#{subdomain}.datadoghq.com#{path}"
       end