diff --git a/tests/TESTrun b/tests/TESTrun

index b423627..aa3c97d 100755

--- a/tests/TESTrun

+++ b/tests/TESTrun

@@ -102,7 +102,7 @@ sub runtest {

     #

     # Furthermore, on Windows, fc can't read the standard input, so we

     # can't do it as a pipeline in any case.

-    $r = system "$TCPDUMP -# -n -r $input $options >tests/NEW/${outputbase} 2>${rawstderrlog}";

+    $r = system "$TCPDUMP -# -nn -r $input $options >tests/NEW/${outputbase} 2>${rawstderrlog}";

     if($r != 0) {

         #

         # Something other than "tcpdump opened the file, read it, and