diff --git a/Project.toml b/Project.toml
index 9206411..6d271cb 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "DerivableInterfaces"
 uuid = "6c5e35bf-e59e-4898-b73c-732dcc4ba65f"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
-version = "0.5.1"
+version = "0.5.2"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
diff --git a/src/abstractinterface.jl b/src/abstractinterface.jl
index 8223c6d..dd89129 100644
--- a/src/abstractinterface.jl
+++ b/src/abstractinterface.jl
@@ -6,6 +6,8 @@ interface(x1, x_rest...) = combine_interfaces(interface(x1), interface.(x_rest).
 
 abstract type AbstractInterface end
 
+interface(x::AbstractInterface) = x
+
 (interface::AbstractInterface)(f) = InterfaceFunction(interface, f)
 
 # Adapted from `Base.Broadcast.combine_styles`.
diff --git a/src/defaultarrayinterface.jl b/src/defaultarrayinterface.jl
index 3861a3e..d0d7a2e 100644
--- a/src/defaultarrayinterface.jl
+++ b/src/defaultarrayinterface.jl
@@ -1,19 +1,50 @@
-struct DefaultArrayInterface{N} <: AbstractArrayInterface{N} end
+using TypeParameterAccessors: parenttype, set_eltype, unspecify_type_parameters
 
+struct DefaultArrayInterface{N,A<:AbstractArray} <: AbstractArrayInterface{N} end
+
+DefaultArrayInterface{N}() where {N} = DefaultArrayInterface{N,AbstractArray}()
 DefaultArrayInterface() = DefaultArrayInterface{Any}()
 DefaultArrayInterface(::Val{N}) where {N} = DefaultArrayInterface{N}()
 DefaultArrayInterface{M}(::Val{N}) where {M,N} = DefaultArrayInterface{N}()
+DefaultArrayInterface{M,A}(::Val{N}) where {M,A,N} = DefaultArrayInterface{N,A}()
+
+# This version remembers the `ndims` of the wrapper type.
+function _interface(::Val{N}, arrayt::Type{<:AbstractArray}) where {N}
+  arrayt′ = parenttype(arrayt)
+  if arrayt′ === arrayt
+    return DefaultArrayInterface{N,unspecify_type_parameters(arrayt)}()
+  end
+  return typeof(interface(arrayt′))(Val(N))
+end
 
-using TypeParameterAccessors: parenttype
-function interface(a::Type{<:AbstractArray})
-  parenttype(a) === a && return DefaultArrayInterface()
-  return interface(parenttype(a))
+function DerivableInterfaces.interface(arrayt::Type{<:AbstractArray{<:Any,N}}) where {N}
+  return _interface(Val(N), arrayt)
 end
-function interface(a::Type{<:AbstractArray{<:Any,N}}) where {N}
-  parenttype(a) === a && return DefaultArrayInterface{N}()
-  return interface(parenttype(a))
+function DerivableInterfaces.interface(arrayt::Type{<:AbstractArray})
+  return _interface(Val(Any), arrayt)
+end
+
+function Base.similar(
+  ::DefaultArrayInterface{<:Any,A}, T::Type, ax::Tuple
+) where {A<:AbstractArray}
+  if isabstracttype(A)
+    # If the type is abstract, default to constructing the array on CPU.
+    return similar(Array{T}, ax)
+  else
+    return similar(set_eltype(A, T), ax)
+  end
 end
 
+function combine_interface_rule(
+  interface1::DefaultArrayInterface{N,A}, interface2::DefaultArrayInterface{N,A}
+) where {N,A<:AbstractArray}
+  return DefaultArrayInterface{N,A}()
+end
+function combine_interface_rule(
+  interface1::DefaultArrayInterface{<:Any,A}, interface2::DefaultArrayInterface{<:Any,A}
+) where {A<:AbstractArray}
+  return DefaultArrayInterface{Any,A}()
+end
 function combine_interface_rule(
   interface1::DefaultArrayInterface{N}, interface2::DefaultArrayInterface{N}
 ) where {N}
@@ -22,7 +53,7 @@ end
 function combine_interface_rule(
   interface1::DefaultArrayInterface, interface2::DefaultArrayInterface
 )
-  return DefaultArrayInterface{Any}()
+  return DefaultArrayInterface()
 end
 
 @interface ::DefaultArrayInterface function Base.getindex(
@@ -48,7 +79,3 @@ end
 )
   return Base.mapreduce(f, op, as...; kwargs...)
 end
-
-function Base.similar(::DefaultArrayInterface, T::Type, ax::Tuple)
-  return similar(Array{T}, ax)
-end
diff --git a/test/Project.toml b/test/Project.toml
index 2c88278..03a08a0 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -2,6 +2,7 @@
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 ArrayLayouts = "4c555306-a7a7-4459-81d9-ec55ddd5c99a"
 DerivableInterfaces = "6c5e35bf-e59e-4898-b73c-732dcc4ba65f"
+JLArrays = "27aeb0d3-9eb9-45fb-866b-73c2ecf80fcb"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
 Suppressor = "fd094767-a336-5f1f-9728-57cf17d0bbfb"
@@ -12,6 +13,7 @@ TestExtras = "5ed8adda-3752-4e41-b88a-e8b09835ee3a"
 Aqua = "0.8"
 ArrayLayouts = "1"
 DerivableInterfaces = "0.5"
+JLArrays = "0.2"
 LinearAlgebra = "1"
 SafeTestsets = "0.1"
 Suppressor = "0.2"
diff --git a/test/SparseArrayDOKs.jl b/test/SparseArrayDOKs.jl
index 9f80c3f..192cf64 100644
--- a/test/SparseArrayDOKs.jl
+++ b/test/SparseArrayDOKs.jl
@@ -267,7 +267,7 @@ end
 
 # Specify the interface the type adheres to.
 function DerivableInterfaces.interface(arrayt::Type{<:SparseArrayDOK})
-  SparseArrayInterface{ndims(arrayt)}()
+  return SparseArrayInterface{ndims(arrayt)}()
 end
 
 # Define aliases like `SparseMatrixDOK`, `AnySparseArrayDOK`, etc.
diff --git a/test/test_defaultarrayinterface.jl b/test/test_defaultarrayinterface.jl
index 6d2cb23..6820882 100644
--- a/test/test_defaultarrayinterface.jl
+++ b/test/test_defaultarrayinterface.jl
@@ -1,4 +1,5 @@
 using DerivableInterfaces: @interface, DefaultArrayInterface, interface
+using JLArrays: JLArray, jl
 using Test: @testset, @test
 using TestExtras: @constinferred
 
@@ -33,14 +34,47 @@ end
 end
 
 @testset "DefaultArrayInterface" begin
-  @test interface(Array) === DefaultArrayInterface{Any}()
-  @test interface(Array{Float32}) === DefaultArrayInterface{Any}()
-  @test interface(Matrix) === DefaultArrayInterface{2}()
-  @test interface(Matrix{Float32}) === DefaultArrayInterface{2}()
-  @test DefaultArrayInterface() === DefaultArrayInterface{Any}()
-  @test DefaultArrayInterface(Val(2)) === DefaultArrayInterface{2}()
-  @test DefaultArrayInterface{Any}(Val(2)) === DefaultArrayInterface{2}()
-  @test DefaultArrayInterface{3}(Val(2)) === DefaultArrayInterface{2}()
+  @test @constinferred(interface(Array)) === DefaultArrayInterface{Any,Array}()
+  @test @constinferred(interface(Array{Float32})) === DefaultArrayInterface{Any,Array}()
+  @test @constinferred(interface(Matrix)) === DefaultArrayInterface{2,Array}()
+  @test @constinferred(interface(Matrix{Float32})) === DefaultArrayInterface{2,Array}()
+  @test @constinferred(DefaultArrayInterface()) === DefaultArrayInterface{Any}()
+  @test @constinferred(DefaultArrayInterface(Val(2))) === DefaultArrayInterface{2}()
+  @test @constinferred(DefaultArrayInterface{Any}(Val(2))) === DefaultArrayInterface{2}()
+  @test @constinferred(DefaultArrayInterface{3}(Val(2))) === DefaultArrayInterface{2}()
+
+  # DefaultArrayInterface
+  @test @constinferred(interface(AbstractArray)) === DefaultArrayInterface{Any}()
+  @test @constinferred(interface(AbstractArray{<:Any,3})) === DefaultArrayInterface{3}()
+  @test @constinferred(interface(Array{Float32})) === DefaultArrayInterface{Any,Array}()
+  @test @constinferred(interface(Array{Float32,3})) === DefaultArrayInterface{3,Array}()
+  @test @constinferred(interface(SubArray{<:Any,<:Any,Array})) ===
+    DefaultArrayInterface{Any,Array}()
+  @test @constinferred(interface(SubArray{<:Any,<:Any,AbstractArray})) ===
+    DefaultArrayInterface{Any}()
+  @test @constinferred(interface(SubArray{<:Any,2,Array})) ===
+    DefaultArrayInterface{2,Array}()
+  @test @constinferred(interface(randn(2, 2))) === DefaultArrayInterface{2,Array}()
+  @test @constinferred(interface(view(randn(2, 2), 1:2, 1))) ===
+    DefaultArrayInterface{1,Array}()
+
+  # Combining DefaultArrayInterface
+  @test @constinferred(interface(DefaultArrayInterface(), DefaultArrayInterface())) ===
+    DefaultArrayInterface()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2}(), DefaultArrayInterface{2}())
+  ) === DefaultArrayInterface{2}()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2}(), DefaultArrayInterface{3}())
+  ) === DefaultArrayInterface()
+  @test @constinferred(interface(DefaultArrayInterface(), DefaultArrayInterface{3}())) ===
+    DefaultArrayInterface()
+  @test @constinferred(interface(randn(2, 2), randn(2, 2))) ===
+    DefaultArrayInterface{2,Array}()
+  @test @constinferred(interface(randn(2, 2), randn(2))) ===
+    DefaultArrayInterface{Any,Array}()
+  @test @constinferred(interface(randn(2, 2), randn(2, 2)')) ===
+    DefaultArrayInterface{2,Array}()
 end
 
 @testset "similar(::DefaultArrayInterface, ...)" begin
@@ -48,14 +82,77 @@ end
   @test typeof(a) === Matrix{Float32}
   @test size(a) == (2, 2)
 
+  a = @constinferred similar(DefaultArrayInterface{Any,Array}(), Float32, (2, 2))
+  @test typeof(a) === Matrix{Float32}
+  @test size(a) == (2, 2)
+
   a = @constinferred similar(DefaultArrayInterface{1}(), Float32, (2, 2))
   @test typeof(a) === Matrix{Float32}
   @test size(a) == (2, 2)
 end
 
 @testset "Broadcast.DefaultArrayStyle" begin
-  @test interface(Broadcast.DefaultArrayStyle) == DefaultArrayInterface()
-  @test interface(Broadcast.DefaultArrayStyle{2}) == DefaultArrayInterface{2}()
-  @test interface(Broadcast.Broadcasted(nothing, +, (randn(2), randn(2)))) ==
-    DefaultArrayInterface{1}()
+  @test @constinferred(interface(Broadcast.DefaultArrayStyle)) == DefaultArrayInterface()
+  @test @constinferred(interface(Broadcast.DefaultArrayStyle{2})) ==
+    DefaultArrayInterface{2}()
+  @test @constinferred(
+    interface(Broadcast.Broadcasted(nothing, +, (randn(2), randn(2))))
+  ) == DefaultArrayInterface{1}()
+end
+
+@testset "DefaultArrayInterface with custom array type" begin
+  # ArrayInterface
+  a = jl(randn(2, 2))
+  @test @constinferred(interface(JLArray{Float32})) === DefaultArrayInterface{Any,JLArray}()
+  @test @constinferred(interface(SubArray{<:Any,2,JLArray{Float32}})) ===
+    DefaultArrayInterface{2,JLArray}()
+  @test @constinferred(interface(a)) === DefaultArrayInterface{2,JLArray}()
+  @test @constinferred(interface(a')) === DefaultArrayInterface{2,JLArray}()
+  @test @constinferred(interface(view(a, 1:2, 1))) === DefaultArrayInterface{1,JLArray}()
+  a′ = @constinferred similar(a, Float32, (2, 3, 3))
+  @test a′ isa JLArray{Float32,3}
+  @test size(a′) == (2, 3, 3)
+
+  # Combining ArrayInterface
+  @test @constinferred(
+    interface(DefaultArrayInterface{2,JLArray}(), DefaultArrayInterface{2,JLArray}())
+  ) === DefaultArrayInterface{2,JLArray}()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2,JLArray}(), DefaultArrayInterface{3,JLArray}())
+  ) === DefaultArrayInterface{Any,JLArray}()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2,JLArray}(), DefaultArrayInterface{2}())
+  ) === DefaultArrayInterface{2}()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2,JLArray}(), DefaultArrayInterface{2,Array}())
+  ) === DefaultArrayInterface{2}()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2}(), DefaultArrayInterface{2,JLArray}())
+  ) === DefaultArrayInterface{2}()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2,Array}(), DefaultArrayInterface{2,JLArray}())
+  ) === DefaultArrayInterface{2}()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2,JLArray}(), DefaultArrayInterface{3}())
+  ) === DefaultArrayInterface()
+  @test @constinferred(
+    interface(DefaultArrayInterface{2,JLArray}(), DefaultArrayInterface{3,Array}())
+  ) === DefaultArrayInterface()
+  @test @constinferred(
+    interface(DefaultArrayInterface{3}(), DefaultArrayInterface{2,JLArray}())
+  ) === DefaultArrayInterface()
+  @test @constinferred(
+    interface(DefaultArrayInterface{3,Array}(), DefaultArrayInterface{2,JLArray}())
+  ) === DefaultArrayInterface()
+  @test @constinferred(interface(jl(randn(2, 2)), jl(randn(2, 2)))) ===
+    DefaultArrayInterface{2,JLArray}()
+  @test @constinferred(interface(jl(randn(2, 2)), jl(randn(2, 2))')) ===
+    DefaultArrayInterface{2,JLArray}()
+  @test @constinferred(interface(jl(randn(2, 2)), jl(randn(2, 2, 2)))) ===
+    DefaultArrayInterface{Any,JLArray}()
+  @test @constinferred(interface(view(jl(randn(2, 2))', 1:2, 1), jl(randn(2)))) ===
+    DefaultArrayInterface{1,JLArray}()
+  @test @constinferred(interface(randn(2, 2), jl(randn(2, 2)))) ===
+    DefaultArrayInterface{2}()
+  @test @constinferred(interface(randn(2, 2), jl(randn(2)))) === DefaultArrayInterface()
 end