diff --git a/test/tw-1643.t b/test/tw-1643.t
new file mode 100755
index 000000000..e1fb9aa7e
--- /dev/null
+++ b/test/tw-1643.t
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+source bash_tap_tw.sh
+
+task add TW-1643 pro:YDKJS +work
+task context define work +work
+task context work
+task pro:YDKJS mod prio:M
+task all | grep TW-1643