diff --git a/molecule/settings.py b/molecule/settings.py
index 7ebfa99..66159dd 100644
--- a/molecule/settings.py
+++ b/molecule/settings.py
@@ -204,7 +204,7 @@ class SpecPreprocessor:
             # call recursively
             new_split_line.append(new_arg)
 
-        new_line = " ".join(new_split_line)
+        new_line = " ".join(new_split_line) + "\n"
         return self._builtin_recursive_expand(new_line)
 
     def parse(self):