diff --git a/test/ci/test_all_ocp.jl b/test/ci/test_all_ocp.jl
index c5cc571b..482e2276 100644
--- a/test/ci/test_all_ocp.jl
+++ b/test/ci/test_all_ocp.jl
@@ -75,7 +75,7 @@ end
     test_problem(jackson())
 end
 
-# moonlander / quadrotor -- DISABLED, see control-toolbox/CTDirect.jl#626.
+# moonlander -- DISABLED, see control-toolbox/CTDirect.jl#626.
 #
 # ADNLPModels' SparseReverseADHessian (used by the :manual and :optimized ADNLP
 # backends) records its ReverseDiff tape on an *uninitialised* Vector{Dual} and
@@ -84,24 +84,24 @@ end
 # throws `DomainError: sincos(x) is only defined for finite x` before any solve.
 # Deterministic on the Julia 1.12 CI runners, flaky on 1.10.
 # Upstream: JuliaSmoothOptimizers/ADNLPModels.jl#383
-#
-# NB: the ":quadrotor" testset below always ran moonlander() (copy-paste slip) --
-# wire it to quadrotor() with adnlp_backend=:default when re-enabling (#626).
-#
-# if !isdefined(Main, :moonlander)
-#     include("../problems/moonlander.jl")
-# end
-# @testset verbose = true showtiming = true ":moonlander" begin
-#     test_problem(moonlander(); adnlp_backend=:manual)
-# end
-
-#if !isdefined(Main, :quadrotor)
-#     include("../problems/quadrotor.jl")
+
+#if !isdefined(Main, :moonlander)
+#    include("../problems/moonlander.jl")
 #end
-#@testset verbose = true showtiming = true ":quadrotor" begin
-#    test_problem(quadrotor())
+#@testset verbose = true showtiming = true ":moonlander" begin
+#    test_problem(moonlander(); adnlp_backend=:manual)
 #end
 
+
+# NB: the ":quadrotor" testset below always ran moonlander() (copy-paste slip) --
+# quadrotor
+if !isdefined(Main, :quadrotor)
+     include("../problems/quadrotor.jl")
+end
+@testset verbose = true showtiming = true ":quadrotor" begin
+    test_problem(quadrotor(); adnlp_backend=:manual)
+end
+
 # robbins
 if !isdefined(Main, :robbins)
     include("../problems/robbins.jl")
@@ -126,13 +126,13 @@ end
     test_problem(space_shuttle())
 end
 
-# # truck trailer
-# if !isdefined(Main, :truck_trailer)
-#     include("../problems/truck_trailer.jl")
-# end
-# @testset verbose = true showtiming = true ":truck_trailer" begin
-#     test_problem(truck_trailer(); adnlp_backend=:manual)
-# end
+# truck trailer
+if !isdefined(Main, :truck_trailer)
+    include("../problems/truck_trailer.jl")
+end
+@testset verbose = true showtiming = true ":truck_trailer" begin
+    test_problem(truck_trailer(); adnlp_backend=:manual)
+end
 
 # vanderpol
 if !isdefined(Main, :vanderpol)