diff -r e9d5f54765a2 -r d0bc98161794 tests/test-exchange-C4.t
--- a/tests/test-exchange-C4.t	Tue Mar 14 16:56:48 2017 -0700
+++ b/tests/test-exchange-C4.t	Tue Mar 21 10:25:12 2017 +0100
@@ -2,7 +2,7 @@
 
 Initial setup
 
-  $ . $TESTDIR/_exc-util.sh
+  $ . $TESTDIR/testlib/exchange-util.sh
 
 === C.4 multiple successors, one is pruned ===