 His career ended unhappily on Australia's first ever tour to the West Indies. He took match figures of 2 / 126 in the First Test in Kingston, Jamaica in a high-scoring win. These were to be his last Test wickets as he took a total of 0 / 60 in the Second Test in Trinidad. He was retained for the Third Test but injured himself early in the match while fielding and neither batted nor bowled. He was injured for the next month and missed the Fourth Test but returned for the Fifth. Early on the first day he suffered yet another knee injury as he changed direction while attempting to catch a Clyde Walcott pull shot. His teammates Alan Davidson and Peter Burge removed a bench from the dressing room wall and used it as an improvised stretcher to carry Johnston from the ground; his Test career ended without bowling or batting in either of his last two matches. His final Test wicket had been that of Glendon Gibbs in the second innings of the First Test. In six first-class matches for the tour, he managed only nine wickets at 51.00.
