Testsuite: random number used for DSN MIME boundary can have few digits

diff --git a/test/runtest b/test/runtest
index 22fb69fb30e90c5683719fee4ba85d39b6342b35..f79d51e872fb7a62447efc6d64a6a65e7d7ea37c 100755 (executable)
--- a/test/runtest
+++ b/test/runtest
@@ -806,7 +806,7 @@ RESET_AFTER_EXTRA_LINE_READ:
 
   # ==========================================================
   # MIME boundaries in RFC3461 DSN messages
-  s/\d{8,10}-eximdsn-\d{7,10}/NNNNNNNNNN-eximdsn-MMMMMMMMMM/;
+  s/\d{8,10}-eximdsn-\d+/NNNNNNNNNN-eximdsn-MMMMMMMMMM/;
 
   # ==========================================================
   # Some munging is specific to the specific file types