Australia fast bowler Mitchell Johnson is on the verge of announcing his retirement from Test cricket, according to reports.

The 34-year-old admitted before his side's second Test against New Zealand that his future in the game was on his mind due to his advancing years.

However, Johnson's struggles at the WACA against the Kiwis over the course of the match has speeded up his decision to end his Test career after recording figures of 1-157 in his 28 overs.

The Aussie will make his announcement at the end of his side's clash against Brendon McCullum's men as speculation increased after his manager Sam Halvorsen was seen entering the dressing room at the end of day four, report several media outlets.

Johnson has played 73 Tests for the Baggy Greens, taking 311 wickets.