diff --git a/src/axis.jl b/src/axis.jl
index 3dfa8e49..0de458aa 100644
--- a/src/axis.jl
+++ b/src/axis.jl
@@ -1,3 +1,9 @@
+"""
+    AbstractAxis{IdxMap}
+
+Abstract supertype for axis metadata used by `ComponentArray` to map component
+names and shaped views onto positions in the wrapped array.
+"""
 abstract type AbstractAxis{IdxMap} end
 
 @inline indexmap(::AbstractAxis{IdxMap}) where {IdxMap} = IdxMap
@@ -53,6 +59,22 @@ function Axis(symbols::Union{AbstractVector{Symbol}, NTuple{N, Symbol}}) where {
 end
 Axis(symbols::Vararg{Symbol}) = Axis(symbols)
 
+"""
+    FlatAxis()
+
+Axis marker for an unnamed, flat dimension of a `ComponentArray`.
+
+# Examples
+
+```jldoctest
+julia> using ComponentArrays
+
+julia> x = ComponentArray(reshape(1:4, 2, 2), Axis(row = 1:2), FlatAxis());
+
+julia> getaxes(x)
+(Axis(row = 1:2,), FlatAxis())
+```
+"""
 const FlatAxis = Axis{NamedTuple()}
 const NullorFlatAxis = Union{NullAxis, FlatAxis}
 
@@ -67,6 +89,23 @@ struct ShapedAxis{Shape} <: AbstractAxis{nothing} end
 # ShapedAxis(::Tuple{<:Int}) = FlatAxis()
 Base.length(::ShapedAxis{Shape}) where {Shape} = prod(Shape)
 
+"""
+    Shaped1DAxis(shape::Tuple{<:Integer})
+
+Axis marker for a one-dimensional array component. `ShapedAxis((n,))` returns a
+`Shaped1DAxis` so vector-valued components keep their one-dimensional shape.
+
+# Examples
+
+```jldoctest
+julia> using ComponentArrays
+
+julia> ax = Shaped1DAxis((3,));
+
+julia> size(ax)
+(3,)
+```
+"""
 struct Shaped1DAxis{Shape} <: AbstractAxis{nothing} end
 ShapedAxis(shape::Tuple{<:Int}) = Shaped1DAxis{shape}()
 Shaped1DAxis(shape::Tuple{<:Int}) = Shaped1DAxis{shape}()
diff --git a/src/compat/static_arrays.jl b/src/compat/static_arrays.jl
index e984361d..cf36fe3b 100644
--- a/src/compat/static_arrays.jl
+++ b/src/compat/static_arrays.jl
@@ -16,6 +16,31 @@ _maybe_SArray(x, vals...) = x
     return :(_maybe_SArray(ca.$s, $(Val(length(comp_ind.idx))), $(comp_ind.ax)))
 end
 
+"""
+    @static_unpack lhs = rhs
+
+Unpack fields from a `ComponentVector`, converting plain array fields to
+`StaticArrays` values when their sizes are known from the component axes.
+Scalar fields and nested `ComponentArray`s are returned unchanged.
+
+# Examples
+
+```jldoctest
+julia> using ComponentArrays, StaticArrays
+
+julia> x = ComponentVector(a = 5, b = [4, 1]);
+
+julia> @static_unpack a, b = x;
+
+julia> a
+5
+
+julia> b
+2-element SVector{2, Int64} with indices SOneTo(2):
+ 4
+ 1
+```
+"""
 macro static_unpack(expr)
     @assert expr.head == :(=) "Unpack expression must have an equals sign for assignment"
     lhs, rhs = expr.args
diff --git a/src/utils.jl b/src/utils.jl
index 579dd35b..e10768d6 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -1,5 +1,18 @@
 @deprecate fastindices(i::Tuple) Val.(i)
 @deprecate fastindices(i...) Val.((i...,))
+@doc """
+    fastindices(i...)
+    fastindices(i::Tuple)
+
+Deprecated helper for converting symbolic indices to `Val` wrappers. Use `Val`
+constructors directly instead.
+
+# Examples
+
+```julia
+Val.((:a, :b))
+```
+""" fastindices
 
 # Make a Val if input isn't already one
 toval(x::Val) = x
diff --git a/test/Autodiff/Project.toml b/test/Autodiff/Project.toml
index e603f4a8..2e885ea8 100644
--- a/test/Autodiff/Project.toml
+++ b/test/Autodiff/Project.toml
@@ -22,7 +22,7 @@ Mooncake = "0.5.26"
 Optimisers = "0.4.7"
 ReverseDiff = "1.16.2"
 SafeTestsets = "0.0.1, 0.1"
-SciMLTesting = "1"
+SciMLTesting = "2.1"
 Test = "1"
 Tracker = "0.2.38"
 Zygote = "0.7.10"
diff --git a/test/Downstream/Project.toml b/test/Downstream/Project.toml
index 9698fa05..4daf9825 100644
--- a/test/Downstream/Project.toml
+++ b/test/Downstream/Project.toml
@@ -13,6 +13,6 @@ Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 [compat]
 LabelledArrays = "1.17.0"
 SafeTestsets = "0.0.1, 0.1"
-SciMLTesting = "1"
+SciMLTesting = "2.1"
 Test = "1"
 Unitful = "1.27.0"
diff --git a/test/GPU/Project.toml b/test/GPU/Project.toml
index e34a43b4..211b26db 100644
--- a/test/GPU/Project.toml
+++ b/test/GPU/Project.toml
@@ -9,5 +9,5 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 [compat]
 JLArrays = "0.3.0"
 SafeTestsets = "0.0.1, 0.1"
-SciMLTesting = "1"
+SciMLTesting = "2.1"
 Test = "1"
diff --git a/test/Project.toml b/test/Project.toml
index b32ca9e4..f602a13b 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -25,7 +25,7 @@ InvertedIndices = "1.3.1"
 LabelledArrays = "1.19.0"
 OffsetArrays = "1.17.0"
 SafeTestsets = "0.0.1, 0.1"
-SciMLTesting = "1"
+SciMLTesting = "2.1"
 StaticArrays = "1.9.18"
 Test = "1"
 Tracker = "0.2.38"
diff --git a/test/Reactant/Project.toml b/test/Reactant/Project.toml
index 1fc0b70a..6c98d3b9 100644
--- a/test/Reactant/Project.toml
+++ b/test/Reactant/Project.toml
@@ -8,5 +8,5 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 [compat]
 Reactant = "0.2.198"
 SafeTestsets = "0.0.1, 0.1"
-SciMLTesting = "1"
+SciMLTesting = "2.1"
 Test = "1"
diff --git a/test/qa/Project.toml b/test/qa/Project.toml
index 5f35553b..649e8823 100644
--- a/test/qa/Project.toml
+++ b/test/qa/Project.toml
@@ -8,5 +8,5 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 [compat]
 JET = "0.9, 0.10, 0.11"
 SafeTestsets = "0.0.1, 0.1"
-SciMLTesting = "1.6"
+SciMLTesting = "2.1"
 Test = "1"
diff --git a/test/qa/qa.jl b/test/qa/qa.jl
index 43d0c166..b3255e84 100644
--- a/test/qa/qa.jl
+++ b/test/qa/qa.jl
@@ -4,6 +4,7 @@ using JET
 run_qa(
     ComponentArrays;
     explicit_imports = true,
+    api_docs_kwargs = (; rendered = true),
     # ComponentArrays has real method ambiguities and unbound type parameters in its
     # vcat/hcat/getindex/Axis overloads; these are long-standing design realities, not
     # tracked-broken placeholders, so disable the sub-checks rather than fail.