ORA-12154: space is really matter

Got an stupid error ORA-12154: TNS:could not resolve the connect identifier specifed.
Double check tnsnames.ora, sqlnet.ora, TNS_ADMIN – all were correct
This one in tnsnames doesn’t work:

TEST =
(DESCRIPTION =
  (ADDRESS = (PROTOCOL= TCP)(HOST= myhost)(Port= 1521))
  (CONNECT_DATA =
    (SERVER = DEDICATED)
    (SERVICE_NAME = db1)
)
)

and this one works:

TEST =
(DESCRIPTION =
  (ADDRESS = (PROTOCOL= TCP)(HOST= myhost)(Port= 1521))
  (CONNECT_DATA =
    (SERVER = DEDICATED)
    (SERVICE_NAME = db1)
 )
)

Difference only in one space in penultimate line.

It’s interesting, that tnsping shows another error

TNS-12533: TNS:illegal ADDRESS parameters

but sqlplus

ORA-12154: TNS:could not resolve the connect identifier specifed