diff --git a/src/Test/intlinear.jl b/src/Test/intlinear.jl
index 0663fc8298..89368d217b 100644
--- a/src/Test/intlinear.jl
+++ b/src/Test/intlinear.jl
@@ -82,8 +82,6 @@ function int1test(model::MOI.ModelLike, config::TestConfig)
     end
 end
 
-Base.isapprox(a::T, b::T; kwargs...) where T <: Union{MOI.SOS1, MOI.SOS2} = isapprox(a.weights, b.weights; kwargs...)
-
 # sos from CPLEX.jl" begin
 function int2test(model::MOI.ModelLike, config::TestConfig)
     atol = config.atol
diff --git a/src/sets.jl b/src/sets.jl
index f9195c1b61..9e12d83b97 100644
--- a/src/sets.jl
+++ b/src/sets.jl
@@ -417,9 +417,6 @@ struct SOS1{T <: Real} <: AbstractVectorSet
     weights::Vector{T}
 end
 
-Base.:(==)(a::SOS1{T}, b::SOS1{T}) where T = a.weights == b.weights
-Base.isapprox(a::SOS1{T}, b::SOS1{T}; kwargs...) where T = isapprox(a.weights, b.weights; kwargs...)
-
 """
     SOS2{T <: Real}(weights::Vector{T})
 
@@ -433,12 +430,11 @@ struct SOS2{T <: Real} <: AbstractVectorSet
     weights::Vector{T}
 end
 
-Base.:(==)(a::SOS2{T}, b::SOS2{T}) where T = a.weights == b.weights
-Base.isapprox(a::SOS2{T}, b::SOS2{T}; kwargs...) where T = isapprox(a.weights, b.weights; kwargs...)
+Base.:(==)(a::T, b::T) where {T <: Union{SOS1, SOS2}} = a.weights == b.weights
+Base.isapprox(a::T, b::T; kwargs...) where {T <: Union{SOS1, SOS2}} = isapprox(a.weights, b.weights; kwargs...)
 
 dimension(s::Union{SOS1, SOS2}) = length(s.weights)
 
-
 # isbits types, nothing to copy
 function Base.copy(set::Union{Reals, Zeros, Nonnegatives, Nonpositives,
                               GreaterThan, LessThan, EqualTo, Interval,