diff --git a/ext/SciMLBaseZygoteExt.jl b/ext/SciMLBaseZygoteExt.jl
index 0a2ce6ea1..1f09d55c3 100644
--- a/ext/SciMLBaseZygoteExt.jl
+++ b/ext/SciMLBaseZygoteExt.jl
@@ -4,10 +4,10 @@ using Zygote
 using Zygote: @adjoint, pullback
 import Zygote: literal_getproperty
 using SciMLBase
-using SciMLBase: ODESolution, sym_to_index, remake, 
+using SciMLBase: ODESolution, remake, 
                  getobserved, build_solution, EnsembleSolution,
                  NonlinearSolution, AbstractTimeseriesSolution
-using SymbolicIndexingInterface: symbolic_type, NotSymbolic
+using SymbolicIndexingInterface: symbolic_type, NotSymbolic, variable_index
 using RecursiveArrayTools
 
 # This method resolves the ambiguity with the pullback defined in
@@ -34,7 +34,7 @@ end
 
 @adjoint function getindex(VA::ODESolution, sym, j::Int)
     function ODESolution_getindex_pullback(Δ)
-        i = symbolic_type(sym) != NotSymbolic() ? sym_to_index(sym, VA) : sym
+        i = symbolic_type(sym) != NotSymbolic() ? variable_index(VA, sym) : sym
         du, dprob = if i === nothing
             getter = getobserved(VA)
             grz = pullback(getter, sym, VA.u[j], VA.prob.p, VA.t[j])[2](Δ)
@@ -96,7 +96,7 @@ end
 
 @adjoint function getindex(VA::ODESolution, sym)
     function ODESolution_getindex_pullback(Δ)
-        i = symbolic_type(sym) != NotSymbolic() ? sym_to_index(sym, VA) : sym
+        i = symbolic_type(sym) != NotSymbolic() ? variable_index(VA, sym) : sym
         if i === nothing
             throw(error("Zygote AD of purely-symbolic slicing for observed quantities is not yet supported. Work around this by using `A[sym,i]` to access each element sequentially in the function being differentiated."))
         else
diff --git a/src/ensemble/ensemble_solutions.jl b/src/ensemble/ensemble_solutions.jl
index 07d73172e..57e596270 100644
--- a/src/ensemble/ensemble_solutions.jl
+++ b/src/ensemble/ensemble_solutions.jl
@@ -209,7 +209,7 @@ end
     end
 end
 
-Base.@propagate_inbounds function Base.getindex(x::AbstractEnsembleSolution, ::Union{ScalarSymbolic,ArraySymbolic}, s, ::Colon)
+Base.@propagate_inbounds function RecursiveArrayTools._getindex(x::AbstractEnsembleSolution, ::Union{ScalarSymbolic,ArraySymbolic}, s, ::Colon)
     return [xi[s] for xi in x.u]
 end
 
diff --git a/src/integrator_interface.jl b/src/integrator_interface.jl
index ebfdf0c73..8aad874e5 100644
--- a/src/integrator_interface.jl
+++ b/src/integrator_interface.jl
@@ -450,18 +450,17 @@ function Base.getproperty(A::DEIntegrator, sym::Symbol)
     end
 end
 
-Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, ::NotSymbolic, I::Union{Int, AbstractArray{Int},
+Base.@propagate_inbounds function _getindex(A::DEIntegrator, ::NotSymbolic, I::Union{Int, AbstractArray{Int},
         CartesianIndex, Colon, BitArray,
         AbstractArray{Bool}}...)
     A.u[I...]
 end
 
-Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, ::ScalarSymbolic, sym)
+Base.@propagate_inbounds function _getindex(A::DEIntegrator, ::ScalarSymbolic, sym)
     if is_variable(A, sym)
         return A[variable_index(A, sym)]
     elseif is_parameter(A, sym)
-        Base.depwarn("Indexing with parameters is deprecated. Use `getp(sys, $sym)(integrator)` for parameter indexing.", :parameter_getindex)
-        return getp(A, sym)(A)
+        error("Indexing with parameters is deprecated. Use `getp(sys, $sym)(integrator)` for parameter indexing")
     elseif is_independent_variable(A, sym)
         return A.t
     elseif is_observed(A, sym)
@@ -471,11 +470,11 @@ Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, ::ScalarSymboli
     end
 end
 
-Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, ::ArraySymbolic, sym)
+Base.@propagate_inbounds function _getindex(A::DEIntegrator, ::ArraySymbolic, sym)
     return A[collect(sym)]
 end
 
-Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, ::ScalarSymbolic, sym::Union{Tuple,AbstractArray})
+Base.@propagate_inbounds function _getindex(A::DEIntegrator, ::ScalarSymbolic, sym::Union{Tuple,AbstractArray})
     return getindex.((A,), sym)
 end
 
@@ -484,12 +483,20 @@ Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, sym)
     elsymtype = symbolic_type(eltype(sym))
 
     if symtype != NotSymbolic()
-        return getindex(A, symtype, sym)
+        return _getindex(A, symtype, sym)
     else
-        return getindex(A, elsymtype, sym)
+        return _getindex(A, elsymtype, sym)
     end
 end
 
+Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, ::SymbolicIndexingInterface.SolvedVariables)
+    return getindex(A, variable_symbols(A))
+end
+
+Base.@propagate_inbounds function Base.getindex(A::DEIntegrator, ::SymbolicIndexingInterface.AllVariables)
+    return getindex(A, all_variable_symbols(A))
+end
+
 function observed(A::DEIntegrator, sym)
     getobserved(A)(sym, A.u, A.p, A.t)
 end
@@ -500,8 +507,7 @@ function Base.setindex!(A::DEIntegrator, val, sym)
         if is_variable(A, sym)
             A.u[variable_index(A, sym)] = val
         elseif is_parameter(A, sym)
-            Base.depwarn("Parameter indexing is deprecated. Use `setp(sys, $sym)(integrator, $val)` to set parameter value.", :parameter_setindex)
-            setp(A, sym)(A, val)
+            error("Parameter indexing is deprecated. Use `setp(sys, $sym)(integrator, $val)` to set parameter value.")
         else
             error("Invalid indexing of integrator: $sym is not a state or parameter, it may be an observed variable.")
         end
diff --git a/src/problems/problem_interface.jl b/src/problems/problem_interface.jl
index f8eb35a6e..32f912055 100644
--- a/src/problems/problem_interface.jl
+++ b/src/problems/problem_interface.jl
@@ -1,13 +1,20 @@
 SymbolicIndexingInterface.symbolic_container(prob::AbstractSciMLProblem) = prob.f
 SymbolicIndexingInterface.parameter_values(prob::AbstractSciMLProblem) = prob.p
 
+Base.@propagate_inbounds function Base.getindex(prob::AbstractSciMLProblem, ::SymbolicIndexingInterface.SolvedVariables)
+    return getindex(prob, variable_symbols(prob))
+end
+
+Base.@propagate_inbounds function Base.getindex(prob::AbstractSciMLProblem, ::SymbolicIndexingInterface.AllVariables)
+    return getindex(prob, all_variable_symbols(prob))
+end
+
 Base.@propagate_inbounds function Base.getindex(prob::AbstractSciMLProblem, sym)
     if symbolic_type(sym) == ScalarSymbolic()
         if is_variable(prob.f, sym)
             return prob.u0[variable_index(prob.f, sym)]
         elseif is_parameter(prob.f, sym)
-        Base.depwarn("Indexing with parameters is deprecated. Use `getp(prob, $sym)(prob)` for parameter indexing.", :parameter_getindex)
-            return getp(prob, sym)(prob)
+        error("Indexing with parameters is deprecated. Use `getp(prob, $sym)(prob)` for parameter indexing.")
         elseif is_independent_variable(prob.f, sym)
             return getindepsym(prob)
         elseif is_observed(prob.f, sym)
@@ -37,8 +44,7 @@ function ___internal_setindex!(prob::AbstractSciMLProblem, val, sym)
         if is_variable(prob.f, sym)
             prob.u0[variable_index(prob.f, sym)] = val
         elseif is_parameter(prob.f, sym)
-            Base.depwarn("Indexing with parameters is deprecated. Use `setp(prob, $sym)(prob, $val)` to set parameter value.", :parameter_setindex)
-            setp(prob, sym)(prob, val)
+            error("Indexing with parameters is deprecated. Use `setp(prob, $sym)(prob, $val)` to set parameter value.")
         else
             error("Invalid indexing of problem: $sym is not a state or parameter, it may be an observed variable.")
         end
diff --git a/src/solutions/ode_solutions.jl b/src/solutions/ode_solutions.jl
index 33f3d1d8f..c1d291da3 100644
--- a/src/solutions/ode_solutions.jl
+++ b/src/solutions/ode_solutions.jl
@@ -179,22 +179,30 @@ end
 function (sol::AbstractODESolution)(t::Number, ::Type{deriv}, idxs,
     continuity) where {deriv}
     symbolic_type(idxs) == NotSymbolic() && error("Incorrect specification of `idxs`")
-    augment(sol.interp([t], nothing, deriv, sol.prob.p, continuity), sol)[idxs][1]
+    if is_parameter(sol, idxs)
+        return getp(sol, idxs)(sol)
+    else
+        return augment(sol.interp([t], nothing, deriv, sol.prob.p, continuity), sol)[idxs][1]
+    end
 end
 
 function (sol::AbstractODESolution)(t::Number, ::Type{deriv}, idxs::AbstractVector,
     continuity) where {deriv}
     all(!isequal(NotSymbolic()), symbolic_type.(idxs)) || error("Incorrect specification of `idxs`")
     interp_sol = augment(sol.interp([t], nothing, deriv, sol.prob.p, continuity), sol)
-    [first(interp_sol[idx]) for idx in idxs]
+    [is_parameter(sol, idx) ? getp(sol, idx)(sol) : first(interp_sol[idx]) for idx in idxs]
 end
 
 function (sol::AbstractODESolution)(t::AbstractVector{<:Number}, ::Type{deriv}, idxs,
     continuity) where {deriv}
     symbolic_type(idxs) == NotSymbolic() && error("Incorrect specification of `idxs`")
-    interp_sol = augment(sol.interp(t, nothing, deriv, sol.prob.p, continuity), sol)
-    p = hasproperty(sol.prob, :p) ? sol.prob.p : nothing
-    return DiffEqArray(interp_sol[idxs], t, p, sol)
+    if is_parameter(sol, idxs)
+        return getp(sol, idxs)(sol)
+    else
+        interp_sol = augment(sol.interp(t, nothing, deriv, sol.prob.p, continuity), sol)
+        p = hasproperty(sol.prob, :p) ? sol.prob.p : nothing
+        return DiffEqArray(interp_sol[idxs], t, p, sol)
+    end
 end
 
 function (sol::AbstractODESolution)(t::AbstractVector{<:Number}, ::Type{deriv},
diff --git a/src/solutions/solution_interface.jl b/src/solutions/solution_interface.jl
index 5e1bf1b72..95b19417b 100644
--- a/src/solutions/solution_interface.jl
+++ b/src/solutions/solution_interface.jl
@@ -73,8 +73,7 @@ Base.@propagate_inbounds function Base.getindex(A::AbstractNoTimeSolution, sym)
         if is_variable(A, sym)
             return A[variable_index(A, sym)]
         elseif is_parameter(A, sym)
-            Base.depwarn("Indexing with parameters is deprecated. Use `getp(sys, $sym)(sol)` for parameter indexing.", :parameter_getindex)
-            return getp(A, sym)(A)
+            error("Indexing with parameters is deprecated. Use `getp(sys, $sym)(sol)` for parameter indexing.")
         elseif is_observed(A, sym)
             return SymbolicIndexingInterface.observed(A, sym)(A.u, A.prob.p)
         else
@@ -88,6 +87,14 @@ Base.@propagate_inbounds function Base.getindex(A::AbstractNoTimeSolution, sym)
     end
 end
 
+Base.@propagate_inbounds function Base.getindex(A::AbstractNoTimeSolution, ::SymbolicIndexingInterface.SolvedVariables)
+    return getindex(A, variable_symbols(A))
+end
+
+Base.@propagate_inbounds function Base.getindex(A::AbstractNoTimeSolution, ::SymbolicIndexingInterface.AllVariables)
+    return getindex(A, all_variable_symbols(A))
+end
+
 function observed(A::AbstractTimeseriesSolution, sym, i::Int)
     getobserved(A)(sym, A[i], A.prob.p, A.t[i])
 end
diff --git a/test/downstream/ensemble_nondes.jl b/test/downstream/ensemble_nondes.jl
index 789bdb4fc..970512ef0 100644
--- a/test/downstream/ensemble_nondes.jl
+++ b/test/downstream/ensemble_nondes.jl
@@ -17,7 +17,7 @@ sol = Optimization.solve(ensembleprob, OptimizationOptimJL.BFGS(), EnsembleDistr
 @test findmin(i -> sol[i].objective, 1:4)[1] < sol1.objective
 
 prob = OptimizationProblem(optf, x0, lb = [-0.5, -0.5], ub = [0.5, 0.5])
-ensembleprob = Optimization.EnsembleProblem(prob, 5, prob_func = (prob, i, repeat) -> remake(prob, u0 = rand(-0.5:0.001:0.5, 2)))
+ensembleprob = Optimization.EnsembleProblem(prob, prob_func = (prob, i, repeat) -> remake(prob, u0 = rand(-0.5:0.001:0.5, 2)))
 
 sol = Optimization.solve(ensembleprob, OptimizationOptimJL.BFGS(), EnsembleThreads(), trajectories = 5, maxiters = 5)
 @test findmin(i -> sol[i].objective, 1:4)[1] < sol1.objective
@@ -35,4 +35,4 @@ ensembleprob = EnsembleProblem(prob, [u0, u0 .+ rand(2), u0 .+ rand(2), u0 .+ ra
 
 sol = solve(ensembleprob, EnsembleThreads(), trajectories = 4, maxiters = 100)
 
-sol = solve(ensembleprob, EnsembleDistributed(), trajectories = 4, maxiters = 100)
\ No newline at end of file
+sol = solve(ensembleprob, EnsembleDistributed(), trajectories = 4, maxiters = 100)
diff --git a/test/downstream/integrator_indexing.jl b/test/downstream/integrator_indexing.jl
index f5f180b03..c7dcf73fa 100644
--- a/test/downstream/integrator_indexing.jl
+++ b/test/downstream/integrator_indexing.jl
@@ -18,9 +18,9 @@ tspan = (0.0, 1000000.0)
 oprob = ODEProblem(population_model, u0, tspan, p)
 integrator = init(oprob, Rodas4())
 
-@test_deprecated integrator[a]
-@test_deprecated integrator[population_model.a]
-@test_deprecated integrator[:a]
+@test_throws Exception integrator[a]
+@test_throws Exception integrator[population_model.a]
+@test_throws Exception integrator[:a]
 @test getp(oprob, a)(integrator) == getp(oprob, population_model.a)(integrator) == getp(oprob, :a)(integrator) == 2.0
 @test getp(oprob, b)(integrator) == getp(oprob, population_model.b)(integrator) == getp(oprob, :b)(integrator) == 1.0
 @test getp(oprob, c)(integrator) == getp(oprob, population_model.c)(integrator) == getp(oprob, :c)(integrator) == 1.0
@@ -28,7 +28,8 @@ integrator = init(oprob, Rodas4())
 
 @test integrator[s1] == integrator[population_model.s1] == integrator[:s1] == 2.0
 @test integrator[s2] == integrator[population_model.s2] == integrator[:s2] == 1.0
-
+@test integrator[solvedvariables] == integrator.u
+@test integrator[allvariables] == integrator.u
 step!(integrator, 100.0, true)
 
 @test getp(population_model, a)(integrator) == getp(population_model, population_model.a)(integrator) == getp(population_model, :a)(integrator) == 2.0
@@ -299,6 +300,6 @@ eqs = [collect(D.(x) .~ x)
     D(y) ~ norm(x) * y - x[1]]
 @named sys = ODESystem(eqs, t, [sts...;], [ps...;])
 prob = ODEProblem(sys, [], (0, 1.0))
-@test_broken local integrator = init(prob, Tsit5())
-@test_broken integrator[x] isa Vector{<:Vector}
-@test_broken integrator[@nonamespace sys.x] isa Vector{<:Vector}
+integrator = init(prob, Tsit5())
+@test integrator[x] isa Vector{Float64}
+@test integrator[@nonamespace sys.x] isa Vector{Float64}
diff --git a/test/downstream/problem_interface.jl b/test/downstream/problem_interface.jl
index 3e4cb9cef..67c10c8a0 100644
--- a/test/downstream/problem_interface.jl
+++ b/test/downstream/problem_interface.jl
@@ -1,4 +1,5 @@
 using ModelingToolkit, OrdinaryDiffEq, Test
+using SymbolicIndexingInterface
 
 @parameters σ ρ β
 @variables t x(t) y(t) z(t)
@@ -26,20 +27,37 @@ tspan = (0.0, 100.0)
 # ODEProblem.
 oprob = ODEProblem(sys, u0, tspan, p, jac = true)
 
-@test oprob[σ] == oprob[sys.σ] == oprob[:σ] == 28.0
-@test oprob[ρ] == oprob[sys.ρ] == oprob[:ρ] == 10.0
-@test oprob[β] == oprob[sys.β] == oprob[:β] == 8 / 3
+@test_throws Exception oprob[σ]
+@test_throws Exception oprob[sys.σ]
+@test_throws Exception oprob[:σ]
+getσ1 = getp(sys, σ)
+getσ2 = getp(sys, sys.σ)
+getσ3 = getp(sys, :σ)
+@test getσ1(oprob) == getσ2(oprob) == getσ3(oprob) == 28.0
+getρ1 = getp(sys, ρ)
+getρ2 = getp(sys, sys.ρ)
+getρ3 = getp(sys, :ρ)
+@test getρ1(oprob) == getρ2(oprob) == getρ3(oprob) == 10.0
+getβ1 = getp(sys, β)
+getβ2 = getp(sys, sys.β)
+getβ3 = getp(sys, :β)
+@test getβ1(oprob) == getβ2(oprob) == getβ3(oprob) == 8 / 3
 
 @test oprob[x] == oprob[sys.x] == oprob[:x] == 1.0
 @test oprob[y] == oprob[sys.y] == oprob[:y] == 0.0
 @test oprob[z] == oprob[sys.z] == oprob[:z] == 0.0
-
-oprob[σ] = 10.0
-@test oprob[σ] == oprob[sys.σ] == oprob[:σ] == 10.0
-oprob[sys.ρ] = 20.0
-@test oprob[ρ] == oprob[sys.ρ] == oprob[:ρ] == 20.0
-oprob[σ] = 30.0
-@test oprob[σ] == oprob[sys.σ] == oprob[:σ] == 30.0
+@test oprob[solvedvariables] == oprob[variable_symbols(sys)]
+@test oprob[allvariables] == oprob[all_variable_symbols(sys)]
+
+setσ = setp(sys, σ)
+setσ(oprob, 10.0)
+@test getσ1(oprob) == getσ2(oprob) == getσ3(oprob) == 10.0
+setρ = setp(sys, sys.ρ)
+setρ(oprob, 20.0)
+@test getρ1(oprob) == getρ2(oprob) == getρ3(oprob) == 20.0
+setβ = setp(sys, :β)
+setβ(oprob, 30.0)
+@test getβ1(oprob) == getβ2(oprob) == getβ3(oprob) == 30.0
 
 oprob[x] = 10.0
 @test oprob[x] == oprob[sys.x] == oprob[:x] == 10.0
@@ -56,20 +74,22 @@ noiseeqs = [0.1 * x,
 sprob = SDEProblem(noise_sys, u0, (0.0, 100.0), p)
 u0
 
-@test sprob[σ] == sprob[noise_sys.σ] == sprob[:σ] == 28.0
-@test sprob[ρ] == sprob[noise_sys.ρ] == sprob[:ρ] == 10.0
-@test sprob[β] == sprob[noise_sys.β] == sprob[:β] == 8 / 3
+@test getσ1(sprob) == getσ2(sprob) == getσ3(sprob) == 28.0
+@test getρ1(sprob) == getρ2(sprob) == getρ3(sprob) == 10.0
+@test getβ1(sprob) == getβ2(sprob) == getβ3(sprob) == 8 / 3
 
 @test sprob[x] == sprob[noise_sys.x] == sprob[:x] == 1.0
 @test sprob[y] == sprob[noise_sys.y] == sprob[:y] == 0.0
 @test sprob[z] == sprob[noise_sys.z] == sprob[:z] == 0.0
 
-sprob[σ] = 10.0
-@test sprob[σ] == sprob[noise_sys.σ] == sprob[:σ] == 10.0
-sprob[noise_sys.ρ] = 20.0
-@test sprob[ρ] == sprob[noise_sys.ρ] == sprob[:ρ] == 20.0
-sprob[σ] = 30.0
-@test sprob[σ] == sprob[noise_sys.σ] == sprob[:σ] == 30.0
+setσ(sprob, 10.0)
+@test getσ1(sprob) == getσ2(sprob) == getσ3(sprob) == 10.0
+setρ(sprob, 20.0)
+@test getρ1(sprob) == getρ2(sprob) == getρ3(sprob) == 20.0
+setp(noise_sys, noise_sys.ρ)(sprob, 25.0)
+@test getρ1(sprob) == getρ2(sprob) == getρ3(sprob) == 25.0
+setβ(sprob, 30.0)
+@test getβ1(sprob) == getβ2(sprob) == getβ3(sprob) == 30.0
 
 sprob[x] = 10.0
 @test sprob[x] == sprob[noise_sys.x] == sprob[:x] == 10.0
diff --git a/test/downstream/solution_interface.jl b/test/downstream/solution_interface.jl
index 4e89a968d..88e312a92 100644
--- a/test/downstream/solution_interface.jl
+++ b/test/downstream/solution_interface.jl
@@ -21,9 +21,9 @@ sol = solve(oprob, Rodas4())
 @test sol[s1] == sol[population_model.s1] == sol[:s1]
 @test sol[s2] == sol[population_model.s2] == sol[:s2]
 @test sol[s1][end] ≈ 1.0
-@test_deprecated sol[a]
-@test_deprecated sol[population_model.a]
-@test_deprecated sol[:a]
+@test_throws Exception sol[a]
+@test_throws Exception sol[population_model.a]
+@test_throws Exception sol[:a]
 
 # Tests on SDEProblem
 noiseeqs = [0.1 * s1,
@@ -34,9 +34,9 @@ sol = solve(sprob, ImplicitEM())
 
 @test sol[s1] == sol[noisy_population_model.s1] == sol[:s1]
 @test sol[s2] == sol[noisy_population_model.s2] == sol[:s2]
-@test_deprecated sol[a]
-@test_deprecated sol[noisy_population_model.a]
-@test_deprecated sol[:a]
+@test_throws Exception sol[a]
+@test_throws Exception sol[noisy_population_model.a]
+@test_throws Exception sol[:a]
 ### Tests on layered model (some things should not work). ###
 
 @parameters t σ ρ β
diff --git a/test/downstream/symbol_indexing.jl b/test/downstream/symbol_indexing.jl
index f9fc43c23..c74f928ef 100644
--- a/test/downstream/symbol_indexing.jl
+++ b/test/downstream/symbol_indexing.jl
@@ -49,9 +49,13 @@ sol = solve(prob, Rodas4())
 @test_throws Any sol['a', [1, 2, 3]]
 
 @test sol[a] isa AbstractVector
+@test sol[:a] == sol[a]
 @test sol[a, 1] isa Real
+@test sol[:a, 1] == sol[a, 1]
 @test sol[a, 1:5] isa AbstractVector
+@test sol[:a, 1:5] == sol[a, 1:5]
 @test sol[a, [1, 2, 3]] isa AbstractVector
+@test sol[:a, [1, 2, 3]] == sol[a, [1, 2, 3]]
 
 @test sol[:, 1] isa AbstractVector
 @test sol[:, 1:2] isa AbstractDiffEqArray
@@ -68,7 +72,7 @@ sol = solve(prob, Rodas4())
 @test sol[α, 3] isa Float64
 @test length(sol[α, 5:10]) == 6
 @test getp(prob, γ)(sol) isa Real
-@test getp(prob, γ)(sol) == 2.0
+@test getp(prob, γ)(sol) == getp(prob, :γ)(sol) == 2.0
 @test getp(prob, (lorenz1.σ, lorenz1.ρ))(sol) isa Tuple
 
 @test sol[[lorenz1.x, lorenz2.x]] isa Vector{Vector{Float64}}
@@ -182,16 +186,16 @@ plot(sol,idxs=(t,α))
 
 using LinearAlgebra
 @variables t
-sts = @variables x[1:3](t)=[1, 2, 3.0] y(t)=1.0
+sts = @variables x(t)[1:3]=[1, 2, 3.0] y(t)=1.0
 ps = @parameters p[1:3] = [1, 2, 3]
 D = Differential(t)
 eqs = [collect(D.(x) .~ x)
     D(y) ~ norm(x) * y - x[1]]
 @named sys = ODESystem(eqs, t, [sts...;], [ps...;])
 prob = ODEProblem(sys, [], (0, 1.0))
-@test_broken sol = solve(prob, Tsit5())
-@test_broken sol[x] isa Vector{<:Vector}
-@test_broken sol[@nonamespace sys.x] isa Vector{<:Vector}
+sol = solve(prob, Tsit5())
+@test sol[x] isa Vector{<:Vector}
+@test sol[@nonamespace sys.x] isa Vector{<:Vector}
 
 # accessing parameters
 @variables t x(t)