diff --git a/src/BinarizationAPI/binarize.jl b/src/BinarizationAPI/binarize.jl
index f6b6c6d..9318ec4 100644
--- a/src/BinarizationAPI/binarize.jl
+++ b/src/BinarizationAPI/binarize.jl
@@ -34,7 +34,7 @@ end
 function binarize(::Type{T},
                   img,
                   f::AbstractImageBinarizationAlgorithm,
-                  args...; kwargs...)
+                  args...; kwargs...) where T
     out = Array{T}(undef, size(img))
     binarize!(out, img, f, args...; kwargs...)
     return out
diff --git a/test/runtests.jl b/test/runtests.jl
index a35c8fa..dc566d6 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -9,6 +9,7 @@ include("testutils.jl")
 @testset "ImageBinarization.jl" begin
     include("util.jl")
 
+    # include("adaptive_threshold.jl")
     # include("balanced.jl")
     # include("entropy.jl")
     # include("intermodes.jl")