diff --git a/etc/mtree/BSD.tests.dist b/etc/mtree/BSD.tests.dist
index f7965dac288..b21256c8563 100644
--- a/etc/mtree/BSD.tests.dist
+++ b/etc/mtree/BSD.tests.dist
@@ -996,6 +996,8 @@
         ..
         diff
         ..
+        diff3
+        ..
         dirname
         ..
         du