+ # Environment cleaning
+ next if /\w+ in keep_environment\? (yes|no)/;
+
+ # Sizes vary with test hostname
+ s/^cmd buf flush \d+ bytes/cmd buf flush ddd bytes/;
+
+ # Different platforms put different error messages into retry records
+ s/dbfn_write: key=.* datalen \K\d{2,3}$/nn/;
+ s/dbfn_read: size \K\d{2,3}(?= return$)/nnn/;
+
+ # Spool filesystem free space changes on different systems.
+ s/((?:spool|log) directory space =) -?\d+K (inodes =)\s*-?\d+/$1 nnnnnK $2 nnnnn/;
+
+ # CONTENT_SCAN
+ next if /try option acl_(?:not_)?smtp_mime$/;
+