@testset "Find Closest" begin

  println("Testing NLP solver")

  using NLsolve, PlotlyJS

  # Initial Setup
  sc = Sc("test")
  a = rand(25000:1.:40000)
  e = rand(0.01:0.01:0.05)
  i = rand(0.01:0.01:π/6)
  T = 2π*√(a^3/μs["Earth"])
  prop_time = T
  n = 10

  # A simple orbit raising
  start = oe_to_xyz([ a, e, i, 0., 0., 0. ], μs["Earth"])
  Tx, Ty, Tz = conv_T(repeat([0.6], n), repeat([0.], n), repeat([0.], n),
                      start,
                      sc.mass,
                      sc,
                      prop_time,
                      μs["Earth"])
  final = prop(hcat(Tx, Ty, Tz), start, sc, μs["Earth"], prop_time)[3]
  new_T = 2π*√(xyz_to_oe(final, μs["Earth"])[1]^3/μs["Earth"])

  # This should be close enough to 0.6 for convergence
  Tx, Ty, Tz = conv_T(repeat([0.59], n), repeat([0.01], n), repeat([0.], n),
                      start,
                      sc.mass,
                      sc,
                      prop_time,
                      μs["Earth"])
  result = nlp_solve(start, final, sc, μs["Earth"], 0.0, prop_time, hcat(Tx, Ty, Tz))

  # Test and plot
  @test converged(result)
  path1 = prop(zeros((100,3)), start, sc, μs["Earth"], T)[1]
  path2, mass, calc_final = prop(tanh.(result.zero), start, sc, μs["Earth"], prop_time)
  path3 = prop(zeros((100,3)), calc_final, sc, μs["Earth"], new_T)[1]
  path4 = prop(zeros((100,3)), final, sc, μs["Earth"], new_T)[1]
  savefig(plot_orbits([path1, path2, path3, path4],
                      labels=["initial", "transit", "after transit", "final"],
                      colors=["#FFFFFF","#FF4444","#44FF44","#4444FF"]),
                      "../plots/find_closest_test.html")
  if converged(result)
    @test norm(calc_final - final) < 1e-4
  end

end