diff --git a/tests/kdc/check-digest.in b/tests/kdc/check-digest.in
index 2089db090..fa1c35b4f 100644
--- a/tests/kdc/check-digest.in
+++ b/tests/kdc/check-digest.in
@@ -72,6 +72,8 @@ rm -f current-db*
 rm -f out-*
 rm -f mkey.file*
 
+> messages.log
+
 echo Creating database
 ${kadmin} \
     init \