diff --git a/lib/referator/machine.rb b/lib/referator/machine.rb
index de27e9e..75aaf11 100644
--- a/lib/referator/machine.rb
+++ b/lib/referator/machine.rb
@@ -49,6 +49,25 @@ module Referator
       :pong
     end
 
+    def do_exec(command)
+      File.open File.expand_path command.data, workdir do |file|
+        code = ''
+        while running?
+          line = file.gets&.strip
+          break if line.nil?
+          next if line.empty? || line.start_with?('#')
+
+          if line.end_with? '\\'
+            code += line[...-1]
+          else
+            call Command.parse "#{code}#{line}"
+            code = ''
+          end
+        end
+      end
+      nil
+    end
+
     ##########
     # Config #
     ##########
diff --git a/test.rb b/test.rb
index df8050b..1e3c61b 100755
--- a/test.rb
+++ b/test.rb
@@ -133,9 +133,9 @@ cmd :REGISTER_FORMAT, { name: :json, script: :render }
 ################
 
 cmd :REGISTER_REF, RAW_REFS[:self][:foo]
-cmd :REGISTER_REF, RAW_REFS[:self][:bar]
 cmd :REGISTER_REF, RAW_REFS[:link][:example_com]
-cmd :REGISTER_REF, RAW_REFS[:link][:causa_arcana_com]
+
+cmd(:EXEC, 'conf_register_ref') { |result| raise unless result.nil? }
 
 #######
 # REF #
diff --git a/test/conf_register_ref b/test/conf_register_ref
new file mode 100644
index 0000000..d5419a4
--- /dev/null
+++ b/test/conf_register_ref
@@ -0,0 +1,16 @@
+# self references
+register_ref { \
+  "category": "self", \
+  "id": "/blog/bar",  \
+  "slug": "blog-bar", \
+  "text": "Bar"       \
+}
+
+# link references
+register_ref { \
+  "category": "link",                \
+  "id": "causa_arcana_com",          \
+  "slug": "causa-arcana-com",        \
+  "url": "https://causa-arcana.com", \
+  "text": "Causa Arcana"             \
+}