diff --git a/test/code/formatPreservation/addArgNewWithoutParentheses.test b/test/code/formatPreservation/addArgNewWithoutParentheses.test
new file mode 100644
index 0000000000..62d5d7aa2a
--- /dev/null
+++ b/test/code/formatPreservation/addArgNewWithoutParentheses.test
@@ -0,0 +1,9 @@
+Add Arg New Without Parentheses
+-----
+<?php
+new DateTime;
+-----
+$stmts[0]->expr->args = [new Node\Arg(new Scalar\String_('now'))];
+-----
+<?php
+new DateTime('now');