diff --git a/ext/AcceleratedKernelsMetalExt.jl b/ext/AcceleratedKernelsMetalExt.jl
index 2f10894..326429a 100644
--- a/ext/AcceleratedKernelsMetalExt.jl
+++ b/ext/AcceleratedKernelsMetalExt.jl
@@ -10,27 +10,14 @@ import AcceleratedKernels as AK
 function AK.accumulate!(
     op, v::AbstractArray, backend::MetalBackend;
     init,
-    neutral=AK.neutral_element(op, eltype(v)),
-    dims::Union{Nothing, Int}=nothing,
-    inclusive::Bool=true,
-
-    # CPU settings - not used
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=1,
-
-    # Algorithm choice
+    # Algorithm choice is the only differing default
     alg::AK.AccumulateAlgorithm=AK.ScanPrefixes(),
-
-    # GPU settings
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    kwargs...
 )
     AK._accumulate_impl!(
-        op, v, backend,
-        init=init, neutral=neutral, dims=dims, inclusive=inclusive,
-        alg=alg,
-        block_size=block_size, temp=temp, temp_flags=temp_flags,
+        op, v, backend;
+        init, alg,
+        kwargs...
     )
 end
 
@@ -39,28 +26,15 @@ end
 function AK.accumulate!(
     op, dst::AbstractArray, src::AbstractArray, backend::MetalBackend;
     init,
-    neutral=AK.neutral_element(op, eltype(dst)),
-    dims::Union{Nothing, Int}=nothing,
-    inclusive::Bool=true,
-
-    # CPU settings - not used
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=1,
-
-    # Algorithm choice
+    # Algorithm choice is the only differing default
     alg::AK.AccumulateAlgorithm=AK.ScanPrefixes(),
-
-    # GPU settings
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    kwargs...
 )
     copyto!(dst, src)
     AK._accumulate_impl!(
-        op, dst, backend,
-        init=init, neutral=neutral, dims=dims, inclusive=inclusive,
-        alg=alg,
-        block_size=block_size, temp=temp, temp_flags=temp_flags,
+        op, dst, backend;
+        init, alg,
+        kwargs...
     )
 end
 
diff --git a/src/accumulate/accumulate.jl b/src/accumulate/accumulate.jl
index 1738a37..f87b21e 100644
--- a/src/accumulate/accumulate.jl
+++ b/src/accumulate/accumulate.jl
@@ -124,28 +124,12 @@ AK.accumulate!(+, v, alg=AK.ScanPrefixes())
 function accumulate!(
     op, v::AbstractArray, backend::Backend=get_backend(v);
     init,
-    neutral=neutral_element(op, eltype(v)),
-    dims::Union{Nothing, Int}=nothing,
-    inclusive::Bool=true,
-
-    # CPU settings
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=2,
-
-    # Algorithm choice
-    alg::AccumulateAlgorithm=DecoupledLookback(),
-
-    # GPU settings
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    kwargs...
 )
     _accumulate_impl!(
-        op, v, backend,
-        init=init, neutral=neutral, dims=dims, inclusive=inclusive,
-        max_tasks=max_tasks, min_elems=min_elems,
-        alg=alg,
-        block_size=block_size, temp=temp, temp_flags=temp_flags,
+        op, v, backend;
+        init,
+        kwargs...
     )
 end
 
@@ -153,29 +137,13 @@ end
 function accumulate!(
     op, dst::AbstractArray, src::AbstractArray, backend::Backend=get_backend(dst);
     init,
-    neutral=neutral_element(op, eltype(dst)),
-    dims::Union{Nothing, Int}=nothing,
-    inclusive::Bool=true,
-
-    # CPU settings
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=2,
-
-    # Algorithm choice
-    alg::AccumulateAlgorithm=DecoupledLookback(),
-
-    # GPU settings
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    kwargs...
 )
     copyto!(dst, src)
     _accumulate_impl!(
-        op, dst, backend,
-        init=init, neutral=neutral, dims=dims, inclusive=inclusive,
-        max_tasks=max_tasks, min_elems=min_elems,
-        alg=alg,
-        block_size=block_size, temp=temp, temp_flags=temp_flags,
+        op, dst, backend;
+        init,
+        kwargs...
     )
 end
 
@@ -200,17 +168,17 @@ function _accumulate_impl!(
 )
     if isnothing(dims)
         return accumulate_1d!(
-            op, v, backend, alg,
-            init=init, neutral=neutral, inclusive=inclusive,
-            max_tasks=max_tasks, min_elems=min_elems,
-            block_size=block_size, temp=temp, temp_flags=temp_flags,
+            op, v, backend, alg;
+            init, neutral, inclusive,
+            max_tasks, min_elems,
+            block_size, temp, temp_flags,
         )
     else
         return accumulate_nd!(
-            op, v, backend,
-            init=init, neutral=neutral, dims=dims, inclusive=inclusive,
-            max_tasks=max_tasks, min_elems=min_elems,
-            block_size=block_size,
+            op, v, backend;
+            init, neutral, dims, inclusive,
+            max_tasks, min_elems,
+            block_size,
         )
     end
 end
@@ -242,31 +210,15 @@ Out-of-place version of [`accumulate!`](@ref).
 function accumulate(
     op, v::AbstractArray, backend::Backend=get_backend(v);
     init,
-    neutral=neutral_element(op, eltype(v)),
-    dims::Union{Nothing, Int}=nothing,
-    inclusive::Bool=true,
-
-    # CPU settings
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=2,
-
-    # Algorithm choice
-    alg::AccumulateAlgorithm=DecoupledLookback(),
-
-    # GPU settings
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    kwargs...
 )
     dst_type = Base.promote_op(op, eltype(v), typeof(init))
     vcopy = similar(v, dst_type)
     copyto!(vcopy, v)
     accumulate!(
         op, vcopy, backend;
-        init=init, neutral=neutral, dims=dims, inclusive=inclusive,
-        max_tasks=max_tasks, min_elems=min_elems,
-        alg=alg,
-        block_size=block_size, temp=temp, temp_flags=temp_flags,
+        init,
+        kwargs...
     )
     vcopy
 end
diff --git a/src/accumulate/accumulate_1d_cpu.jl b/src/accumulate/accumulate_1d_cpu.jl
index 2066697..eda07ae 100644
--- a/src/accumulate/accumulate_1d_cpu.jl
+++ b/src/accumulate/accumulate_1d_cpu.jl
@@ -2,16 +2,16 @@ function accumulate_1d!(
     op, v::AbstractArray, backend::CPU, alg;
     init,
     neutral,
-    inclusive::Bool=true,
+    inclusive::Bool,
 
     # CPU settings
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=2,
+    max_tasks::Int,
+    min_elems::Int,
 
     # GPU settings - not used
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    block_size::Int,
+    temp::Union{Nothing, AbstractArray},
+    temp_flags::Union{Nothing, AbstractArray},
 )
     # Trivial case
     if length(v) == 0
diff --git a/src/accumulate/accumulate_1d_gpu.jl b/src/accumulate/accumulate_1d_gpu.jl
index b66f443..be3ee59 100644
--- a/src/accumulate/accumulate_1d_gpu.jl
+++ b/src/accumulate/accumulate_1d_gpu.jl
@@ -252,16 +252,16 @@ function accumulate_1d!(
     op, v::AbstractArray, backend::GPU, ::DecoupledLookback;
     init,
     neutral,
-    inclusive::Bool=true,
+    inclusive::Bool,
 
     # CPU settings - not used
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=1,
+    max_tasks::Int,
+    min_elems::Int,
 
     # GPU settings
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    block_size::Int,
+    temp::Union{Nothing, AbstractArray},
+    temp_flags::Union{Nothing, AbstractArray},
 )
     # Correctness checks
     @argcheck block_size > 0
@@ -311,16 +311,16 @@ function accumulate_1d!(
     op, v::AbstractArray, backend::GPU, ::ScanPrefixes;
     init,
     neutral,
-    inclusive::Bool=true,
+    inclusive::Bool,
 
     # CPU settings - not used
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=1,
+    max_tasks::Int,
+    min_elems::Int,
 
     # GPU settings
-    block_size::Int=256,
-    temp::Union{Nothing, AbstractArray}=nothing,
-    temp_flags::Union{Nothing, AbstractArray}=nothing,
+    block_size::Int,
+    temp::Union{Nothing, AbstractArray},
+    temp_flags::Union{Nothing, AbstractArray},
 )
     # Correctness checks
     @argcheck block_size > 0
diff --git a/src/accumulate/accumulate_nd.jl b/src/accumulate/accumulate_nd.jl
index 219f7b0..8aaa83e 100644
--- a/src/accumulate/accumulate_nd.jl
+++ b/src/accumulate/accumulate_nd.jl
@@ -1,16 +1,16 @@
 function accumulate_nd!(
     op, v::AbstractArray, backend::Backend;
     init,
-    neutral=neutral_element(op, eltype(v)),
+    neutral,
     dims::Int,
-    inclusive::Bool=true,
+    inclusive::Bool,
 
     # CPU settings
-    max_tasks::Int=Threads.nthreads(),
-    min_elems::Int=1,
+    max_tasks::Int,
+    min_elems::Int,
 
     # GPU settings
-    block_size::Int=256,
+    block_size::Int,
 )
     # Correctness checks
     @argcheck block_size > 0
diff --git a/test/accumulate.jl b/test/accumulate.jl
index a8b425e..b50ba47 100644
--- a/test/accumulate.jl
+++ b/test/accumulate.jl
@@ -81,6 +81,9 @@
     AK.accumulate!(+, y; init=Int32(init), inclusive=false)
     @test all(Array(y) .== 10:19)
 
+    # Test that undefined kwargs are not accepted
+    @test_throws MethodError AK.accumulate(+, y; init=10, dims=2, inclusive=false, bad=:kwarg)
+
     # Testing different settings
     AK.accumulate!(+, array_from_host(ones(Int32, 1000)), init=0, inclusive=false,
                 block_size=128,
@@ -186,6 +189,9 @@ end
     sh = Array(s)
     @test all([sh[i, :] == 10:19 for i in 1:10])
 
+    # Test that undefined kwargs are not accepted
+    @test_throws MethodError AK.accumulate(+, v; init=10, dims=2, inclusive=false, bad=:kwarg)
+
     # Testing different settings
     AK.accumulate(
         (x, y) -> x + 1,