diff --git a/src/tests/.gitignore b/src/tests/.gitignore
index d77228426..1445bb223 100644
--- a/src/tests/.gitignore
+++ b/src/tests/.gitignore
@@ -1,6 +1,7 @@
 t.t
 tdb.t
 date.t
+duration.t
 pending.data
 completed.data