diff --git a/txexpr/test/contract-tests.rkt b/txexpr/test/contract-tests.rkt
index b011631..c84173b 100644
--- a/txexpr/test/contract-tests.rkt
+++ b/txexpr/test/contract-tests.rkt
@@ -6,7 +6,7 @@
 
 (module+ test
   (check-exn (regexp (string-append
-                      "txexpr: contract violation\n"
+                      "txexpr.*: contract violation\n"
                       " *expected: txexpr-tag\\?\n"
                       " *given: 4\n"
                       " *in: the 1st argument.*"