s.mgr.clock = s.clock
			if _, err := s.mgr.GetServiceAccountToken("a", "b", getTokenRequest()); err != nil {
				t.Fatalf("unexpected error: %v", err)
			}
			if s.tg.count != 1 {
				t.Fatalf("unexpected client call, got: %d, want: 1", s.tg.count)
			}

			if _, err := s.mgr.GetServiceAccountToken("a", "b", getTokenRequest()); err != nil {
				t.Fatalf("unexpected error: %v", err)
			}
			if s.tg.count != 1 {