diff --git a/tests/seek_test.sh b/tests/seek_test.sh
index 7132a25901..996acb3566 100755
--- a/tests/seek_test.sh
+++ b/tests/seek_test.sh
@@ -16,7 +16,7 @@ for i in $list ; do
     tests/seek_test $i >> $logfile
 done
 
-if diff -u "$reffile" "$logfile" ; then
+if diff -u -w "$reffile" "$logfile" ; then
     echo
     echo seek regression test: success
     exit 0