@testset "Monotonic Basin Hopping" begin

  using PlotlyJS

  println("Testing Monotonic Basin Hopper")

  # First we test the random mission guess generator
  println("Testing guess generator function")
  flybys = [Earth, Venus, Jupiter]
  launch_window = ( DateTime(2021,12,25), DateTime(2025,12,25) )
  max_C3 = 10.
  max_v∞ = 8.
  latest_arrival = DateTime(2030,12,25)
  random_guess = Thesis.mission_guess(flybys, bepi, 12_000., launch_window, max_C3, max_v∞, latest_arrival)
  @test typeof(random_guess) == Mission_Guess
  
  # Then the perturb function
  println("Testing perturb function")
  mission_guess = Thesis.perturb(test_mission)
  @test mission_guess.launch_date != test_mission.launch_date
  @test mission_guess.launch_v∞ != test_mission.launch_v∞
  for i in 1:2
    @test mission_guess.phases[i].v∞_in != test_mission.phases[i].v∞_in
    @test mission_guess.phases[i].v∞_out != test_mission.phases[i].v∞_out
    @test mission_guess.phases[i].tof != test_mission.phases[i].tof
  end
  @test !mission_guess.converged
  
  # # Then the inner loop builder function
  println("Testing inner loop solver function")
  mission = Thesis.inner_loop_solve(test_mg)
  @test !mission.converged

  # For the valid case we need to use a lambert's solver
  leave, arrive = DateTime(1992,11,19), DateTime(1993,4,1)
  earth_state = state(Earth, leave)
  venus_state = state(Venus, arrive)
  v∞_out, v∞_in, tof = Thesis.lamberts(Earth, Venus, leave, arrive)
  phase = Phase(Venus, 1.01v∞_in, -1.01v∞_in, tof, 0.01*ones(20,3))
  mission_guess = Mission_Guess(bepi, 12_000., leave, v∞_out, [phase])
  mission = Thesis.inner_loop_solve(mission_guess)
  @test mission.converged
  if !mission.converged println(mission.message) end

  # Now we're ready to test the whole thing!
  println("Testing whole thing")
  flybys = [ Earth, Venus ]
  start_mass = 12_000.
  launch_window = DateTime(1997, 10, 1), DateTime(1997, 10, 31)
  max_C3 = 15.
  max_v∞ = 20.
  latest_arrival = DateTime(2001, 1, 1)
  best, archive = mbh(flybys, bepi, start_mass, launch_window, max_C3, max_v∞, latest_arrival,
                      verbose=true)
  @test typeof(best) == Mission


end