diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a8a094d..9706e52 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -8,57 +8,60 @@ on:
       - master
     tags: '*'
   workflow_dispatch:
+
+concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master` branch
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 jobs:
   test:
-    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ github.event_name }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         version:
-          - '1.0'
-          - '1.6'
+          - 'min'
+          - 'lts'
           - '1'
-          - 'nightly'
+          - 'pre'
         os:
           - ubuntu-latest
-        arch:
-          - x64
+          - windows-latest
+          - macOS-latest
+        exclude:
+          # For Julia 1.6 no aarch64 binary exists
+          - version: 'min'
+            os: macOS-latest
+        include:
+          - version: 'min'
+            os: macOS-13 # uses x64
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
-          arch: ${{ matrix.arch }}
-      - uses: actions/cache@v4
-        env:
-          cache-name: cache-artifacts
-        with:
-          path: ~/.julia/artifacts
-          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
-          restore-keys: |
-            ${{ runner.os }}-test-${{ env.cache-name }}-
-            ${{ runner.os }}-test-
-            ${{ runner.os }}-
+      - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
         with:
-          file: lcov.info
+          files: lcov.info
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: true
   docs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'
-      - run: |
-          julia --project=docs -e '
-            using Pkg
-            Pkg.develop(PackageSpec(path=pwd()))
-            Pkg.instantiate()'
+      - uses: julia-actions/cache@v2
+      - run: julia --project=docs -e 'import Pkg; Pkg.instantiate()'
       - run: |
           julia --project=docs -e '
             using Documenter: doctest
diff --git a/.github/workflows/CompatHelper.yml b/.github/workflows/CompatHelper.yml
index 14fd628..5aa0054 100644
--- a/.github/workflows/CompatHelper.yml
+++ b/.github/workflows/CompatHelper.yml
@@ -24,9 +24,8 @@ jobs:
       - name: "Run CompatHelper"
         run: |
           import CompatHelper
-          CompatHelper.main()
+          CompatHelper.main(; dirs = ["", "docs"])
         shell: julia --color=yes {0}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-#           COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
-#           COMPATHELPER_PRIV: ${{ secrets.COMPATHELPER_PRIV }}
+          COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
diff --git a/.gitignore b/.gitignore
index 8fe2f16..25e1e9d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ Manifest.toml
 *.jl.cov
 *.jl.mem
 .DS_Store
+.vscode/
\ No newline at end of file
diff --git a/Project.toml b/Project.toml
index b076d4b..99a2b9e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -12,13 +12,22 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
+Aqua = "0.8.12"
+Distributed = "<0.0.1, 1"
+LinearAlgebra = "<0.0.1, 1"
 Primes = "0.4, 0.5"
+Random = "<0.0.1, 1"
+Serialization = "<0.0.1, 1"
+SparseArrays = "<0.0.1, 1"
+SpecialFunctions = "0.8, 1, 2"
 Statistics = "<0.0.1, 1"
+Test = "<0.0.1, 1"
 julia = "1"
 
 [extras]
+Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["Test", "SpecialFunctions"]
+test = ["Aqua", "Test", "SpecialFunctions"]
diff --git a/docs/Project.toml b/docs/Project.toml
index aa96972..c271cfe 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -1,3 +1,10 @@
 [deps]
 DistributedArrays = "aaf54ef3-cdf8-58ed-94cc-d582ad619b94"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+
+[compat]
+DistributedArrays = "0.6"
+Documenter = "1"
+
+[sources.DistributedArrays]
+path = ".."
diff --git a/src/DistributedArrays.jl b/src/DistributedArrays.jl
index 916cce4..d7d43d0 100644
--- a/src/DistributedArrays.jl
+++ b/src/DistributedArrays.jl
@@ -14,6 +14,8 @@ import LinearAlgebra: axpy!, dot, norm, mul!
 import Primes
 import Primes: factor
 
+import SparseArrays
+
 # DArray exports
 export DArray, SubDArray, SubOrDArray, @DArray
 export dzeros, dones, dfill, drand, drandn, distribute, localpart, localindices, ppeval
diff --git a/src/broadcast.jl b/src/broadcast.jl
index 4026a54..030f689 100644
--- a/src/broadcast.jl
+++ b/src/broadcast.jl
@@ -63,7 +63,7 @@ end
 #     - Q: How do decide on the cuts
 #   - then localise arguments on each node
 ##
-@inline function Base.copyto!(dest::DDestArray, bc::Broadcasted)
+@inline function Base.copyto!(dest::DDestArray, bc::Broadcasted{Nothing})
     axes(dest) == axes(bc) || Broadcast.throwdm(axes(dest), axes(bc))
 
     # Distribute Broadcasted
diff --git a/src/darray.jl b/src/darray.jl
index b55ccbc..0d1311b 100644
--- a/src/darray.jl
+++ b/src/darray.jl
@@ -384,7 +384,9 @@ function makelocal(A::DArray{<:Any, <:Any, AT}, I::Vararg{Any, N}) where {N, AT}
 end
 
 # shortcut to set/get localparts of a distributed object
-function Base.getindex(d::DArray, s::Symbol)
+Base.getindex(d::DArray, s::Symbol) = _getindex(d, s)
+Base.getindex(d::DistributedArrays.DArray{<:Any, 1}, s::Symbol) = _getindex(d, s)
+function _getindex(d::DArray, s::Symbol)
     @assert s in [:L, :l, :LP, :lp]
     return localpart(d)
 end
@@ -454,6 +456,14 @@ function Base.:(==)(d1::SubDArray, d2::SubDArray)
     return t
 end
 
+# Fix method ambiguities
+for T in (:DArray, :SubDArray)
+    @eval begin
+        Base.:(==)(d1::$T{<:Any,1}, d2::SparseArrays.ReadOnly) = d1 == parent(d2)
+        Base.:(==)(d1::SparseArrays.ReadOnly, d2::$T{<:Any,1}) = parent(d1) == d2
+    end
+end
+
 """
     locate(d::DArray, I::Int...)
 
@@ -513,10 +523,28 @@ dfill(v, d1::Integer, drest::Integer...) = dfill(v, convert(Dims, tuple(d1, dres
 Construct a distributed uniform random array.
 Trailing arguments are the same as those accepted by `DArray`.
 """
-drand(r, dims::Dims, args...) = DArray(I -> rand(r, map(length,I)), dims, args...)
-drand(r, d1::Integer, drest::Integer...) = drand(r, convert(Dims, tuple(d1, drest...)))
-drand(d1::Integer, drest::Integer...) = drand(Float64, convert(Dims, tuple(d1, drest...)))
-drand(d::Dims, args...)  = drand(Float64, d, args...)
+drand(::Type{T}, dims::Dims) where {T} = DArray(I -> rand(T, map(length, I)), dims)
+drand(X, dims::Dims) = DArray(I -> rand(X, map(length, I)), dims)
+drand(dims::Dims) = drand(Float64, dims)
+
+drand(::Type{T}, d1::Integer, drest::Integer...) where {T} = drand(T, Dims((d1, drest...)))
+drand(X, d1::Integer, drest::Integer...) = drand(X, Dims((d1, drest...)))
+drand(d1::Integer, drest::Integer...) = drand(Float64, Dims((d1, drest...)))
+
+# With optional process IDs and number of chunks
+for N in (1, 2)
+    @eval begin
+        drand(::Type{T}, dims::Dims, args::Vararg{Any,$N}) where {T} = DArray(I -> rand(T, map(length, I)), dims, args...)
+        drand(X, dims::Dims, args::Vararg{Any,$N}) = DArray(I -> rand(X, map(length, I)), dims, args...)
+        drand(dims::Dims, args::Vararg{Any,$N}) = drand(Float64, dims, args...)
+    end
+end
+
+# Fix method ambiguities
+drand(dims::Dims, procs::Tuple{Vararg{Int}}) = drand(Float64, dims, procs)
+drand(dims::Dims, procs::Tuple{Vararg{Int}}, dist) = drand(Float64, dims, procs, dist)
+drand(X::Tuple{Vararg{Int}}, dim::Integer) = drand(X, Dims((dim,)))
+drand(X::Tuple{Vararg{Int}}, d1::Integer, d2::Integer) = drand(X, Dims((d1, d2)))
 
 """
      drandn(dims, ...)
@@ -643,7 +671,7 @@ allowscalar(flag = true) = (_allowscalar[] = flag)
 _scalarindexingallowed() = _allowscalar[] || throw(ErrorException("scalar indexing disabled"))
 
 getlocalindex(d::DArray, idx...) = localpart(d)[idx...]
-function getindex_tuple(d::DArray{T}, I::Tuple{Vararg{Int}}) where T
+function getindex_tuple(d::DArray{T,N}, I::NTuple{N,Int}) where {T,N}
     chidx = locate(d, I...)
     idxs = d.indices[chidx...]
     localidx = ntuple(i -> (I[i] - first(idxs[i]) + 1), ndims(d))
@@ -655,16 +683,16 @@ function Base.getindex(d::DArray, i::Int)
     _scalarindexingallowed()
     return getindex_tuple(d, Tuple(CartesianIndices(d)[i]))
 end
-function Base.getindex(d::DArray, i::Int...)
+function Base.getindex(d::DArray{<:Any,N}, i::Vararg{Int,N}) where {N}
     _scalarindexingallowed()
     return getindex_tuple(d, i)
 end
 
-Base.getindex(d::DArray) = d[1]
-if VERSION > v"1.1-"
-Base.getindex(d::SubDArray, I::Int...) = invoke(getindex, Tuple{SubArray{<:Any,N},Vararg{Int,N}} where N, d, I...)
+function Base.getindex(d::DArray{<:Any,N}, I::Vararg{Any,N}) where {N}
+    return view(d, I...)
 end
-Base.getindex(d::SubOrDArray, I::Union{Int,UnitRange{Int},Colon,Vector{Int},StepRange{Int,Int}}...) = view(d, I...)
+
+Base.getindex(d::DArray) = d[1]
 
 function Base.isassigned(D::DArray, i::Integer...)
     try
@@ -692,6 +720,15 @@ function Base.copyto!(dest::SubOrDArray, src::AbstractArray)
     return dest
 end
 
+# Fix method ambiguities
+# TODO: Improve efficiency?
+Base.copyto!(dest::SubOrDArray{<:Any,2}, src::SparseArrays.AbstractSparseMatrixCSC) = copyto!(dest, Matrix(src))
+@static if isdefined(SparseArrays, :CHOLMOD)
+    Base.copyto!(dest::SubOrDArray, src::SparseArrays.CHOLMOD.Dense) = copyto!(dest, Array(src))
+    Base.copyto!(dest::SubOrDArray{T}, src::SparseArrays.CHOLMOD.Dense{T}) where {T<:Union{Float32,Float64,ComplexF32,ComplexF64}} = copyto!(dest, Array(src))
+    Base.copyto!(dest::SubOrDArray{T,2}, src::SparseArrays.CHOLMOD.Dense{T}) where {T<:Union{Float32,Float64,ComplexF32,ComplexF64}} = copyto!(dest, Array(src))
+end
+
 function Base.deepcopy(src::DArray)
     dest = similar(src)
     asyncmap(procs(src)) do p
diff --git a/src/mapreduce.jl b/src/mapreduce.jl
index 9403652..c529d42 100644
--- a/src/mapreduce.jl
+++ b/src/mapreduce.jl
@@ -15,7 +15,13 @@ function Base.map!(f::F, dest::DArray, src::DArray{<:Any,<:Any,A}) where {F,A}
     return dest
 end
 
-function Base.reduce(f, d::DArray)
+# Only defining `reduce(f, ::DArray)` causes method ambiguity issues with
+# - `reduce(hcat, ::AbstractVector{<:AbstractVecOrMat})`
+# - `reduce(vcat, ::AbstractVector{<:AbstractVecOrMat})`
+Base.reduce(f, d::DArray) = _reduce(f, d)
+Base.reduce(::typeof(hcat), d::DArray{<:AbstractVecOrMat, 1}) = _reduce(hcat, d)
+Base.reduce(::typeof(vcat), d::DArray{<:AbstractVecOrMat, 1}) = _reduce(vcat, d)
+function _reduce(f, d::DArray)
     results = asyncmap(procs(d)) do p
         remotecall_fetch(p) do
             return reduce(f, localpart(d))
diff --git a/test/REQUIRE b/test/REQUIRE
deleted file mode 100644
index b2a39ac..0000000
--- a/test/REQUIRE
+++ /dev/null
@@ -1 +0,0 @@
-SpecialFunctions
diff --git a/test/aqua.jl b/test/aqua.jl
new file mode 100644
index 0000000..ec7a70b
--- /dev/null
+++ b/test/aqua.jl
@@ -0,0 +1,6 @@
+using DistributedArrays, Test
+import Aqua
+
+@testset "Aqua" begin
+    Aqua.test_all(DistributedArrays)
+end
diff --git a/test/runtests.jl b/test/runtests.jl
index eb353ca..2bd5ca8 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -32,6 +32,7 @@ function check_leaks()
     end
 end
 
+include("aqua.jl")
 include("darray.jl")
 include("spmd.jl")