diff --git a/src/utils.jl b/src/utils.jl
index 0942fa5f7..a6255dcc6 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -191,7 +191,6 @@ pairwise(d::PreMetric, x::RowVecs, y::ColVecs) = pairwise(d, ColVecs(permutedims
 
 dim(x) = 0 # This is the passes-by-default choice. For a proper check, implement `KernelFunctions.dim` for your datatype.
 dim(x::AbstractVector) = dim(first(x))
-dim(x::AbstractVector{<:AbstractVector{<:Real}}) = length(first(x))
 dim(x::AbstractVector{<:Real}) = 1
 
 function validate_inputs(x, y)
diff --git a/test/utils.jl b/test/utils.jl
index 42784548a..04cf8da3f 100644
--- a/test/utils.jl
+++ b/test/utils.jl
@@ -163,7 +163,7 @@
         @test_throws DimensionMismatch KernelFunctions.validate_inplace_dims(zeros(N2), x)
 
         @test_nowarn KernelFunctions.validate_inputs(x, y)
-        @test_throws DimensionMismatch KernelFunctions.validate_inputs(x⁻, y)
+        @test_nowarn KernelFunctions.validate_inputs(x⁻, y)
 
         @test_nowarn KernelFunctions.validate_inputs(xx, yy)
         @test_nowarn KernelFunctions.validate_inputs(xx⁻, yy)