diff --git a/tests/test-diffdir.out b/tests/test-diffdir.out
--- a/tests/test-diffdir.out
+++ b/tests/test-diffdir.out
@@ -8,3 +8,8 @@ diff -r 3903775176ed b
 +++ b/b
 @@ -0,0 +1,1 @@
 +123
+diff -r 3903775176ed b
+--- /dev/null
++++ b/b
+@@ -0,0 +1,1 @@
++123