diff --git a/tests/gss/check-gssmask.in b/tests/gss/check-gssmask.in
index d94d20677..218a60d88 100644
--- a/tests/gss/check-gssmask.in
+++ b/tests/gss/check-gssmask.in
@@ -63,6 +63,8 @@ rm -f current-db*
 rm -f out-*
 rm -f mkey.file*
 
+> messages.log
+
 echo Creating database
 ${kadmin} \
     init \