Index: tests/shells.test
===================================================================
diff -u -r1d2bdbea2141f159f982e8dde0f9b0a6778a8b71 -r8e2e356e9bcef39f43dfe3690b82d9586c7adc72
--- tests/shells.test	(.../shells.test)	(revision 1d2bdbea2141f159f982e8dde0f9b0a6778a8b71)
+++ tests/shells.test	(.../shells.test)	(revision 8e2e356e9bcef39f43dfe3690b82d9586c7adc72)
@@ -1,4 +1,7 @@
 # -*- Tcl -*-
+
+package prefer latest
+
 package require nx
 package require nx::test