This is how your solution evolves one generation:

. . X X .           . . X X X
. X . X X           . X . . X
X . . . X    -->    X . . . X
. X X X .           . X . . X
. . X X .           . X . X .

So it cant be the solution to any 3x3 pattern, since there are alive cells on the outside rim

Hi, can some one explain , how it can be that I have correct answer and test not passed ?

3 by 3
. . X X .
. X . X X
X . . . X
. X X X .
. . X X .

your solution
. . X X .
. X . X X
X . . . X
. X X X .
. . X X .