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

diff --git a/test/runtest b/test/runtest
index 49964af2adda7198fb35d5076d1887026319c99e..c6d9c729e22c4bc1cb61d6c12e0859f2bdff691b 100755 (executable)
--- a/test/runtest
+++ b/test/runtest
@@ -809,7 +809,7 @@ 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