diff --git a/Project.toml b/Project.toml
index 87c76b0..5cbf975 100644
--- a/Project.toml
+++ b/Project.toml
@@ -4,15 +4,16 @@ authors = ["Tobias Knopp <tobias.knopp@tuhh.de> and contributors"]
 version = "2.3.2"
 
 [deps]
-InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 OhMyThreads = "67456a42-1dca-4109-a031-0a68de7e3ad5"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
+InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 LinearOperators = "5c8ed15e-5a4c-59e4-a42b-c7e8811fb125"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 
 [extras]
+Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 JLArrays = "27aeb0d3-9eb9-45fb-866b-73c2ecf80fcb"
 NonuniformFFTs = "cd96f58b-6017-4a02-bb9e-f4d81626177f"
@@ -22,18 +23,24 @@ FFTW = "7a1cc6ca-52ef-59f5-83cd-3a7055c09341"
 RadonKA = "86de8297-835b-47df-b249-c04e8db91db5"
 
 [compat]
+Aqua = "0.8"
 julia = "1.9"
 GPUArrays = "11"
+InteractiveUtils = "1"
 KernelAbstractions = "0.9"
 JLArrays = "0.2"
 AbstractNFFTs = "0.9"
+LinearAlgebra = "1"
 LinearOperators = "2"
 OhMyThreads = "0.8"
 NonuniformFFTs = "0.9"
 NFFT = "0.14"
 RadonKA = "0.6"
+Random = "1"
 Wavelets = "0.9, 0.10"
 Reexport = "1.0"
+SparseArrays = "1"
+Test = "1"
 FFTW = "1.0"
 
 [weakdeps]
@@ -47,7 +54,7 @@ FFTW = "7a1cc6ca-52ef-59f5-83cd-3a7055c09341"
 RadonKA = "86de8297-835b-47df-b249-c04e8db91db5"
 
 [targets]
-test = ["Test", "FFTW", "Wavelets", "NFFT", "NonuniformFFTs", "JLArrays", "RadonKA"]
+test = ["Test", "Aqua", "FFTW", "Wavelets", "NFFT", "NonuniformFFTs", "JLArrays", "RadonKA"]
 
 [extensions]
 LinearOperatorNFFTExt = ["AbstractNFFTs", "FFTW"]
diff --git a/src/LinearOperatorCollection.jl b/src/LinearOperatorCollection.jl
index 66c9cda..d0a6bb5 100644
--- a/src/LinearOperatorCollection.jl
+++ b/src/LinearOperatorCollection.jl
@@ -14,8 +14,6 @@ using Reexport
 @reexport using LinearOperators
 using OhMyThreads
 
-LinearOperators.use_prod5!(op::opEye) = false
-LinearOperators.has_args5(op::opEye) = false
 
 # Helper function to wrap a prod into a 5-args mul
 function wrapProd(prod::Function)
diff --git a/src/ProdOp.jl b/src/ProdOp.jl
index e33f5c3..4902ccb 100644
--- a/src/ProdOp.jl
+++ b/src/ProdOp.jl
@@ -62,10 +62,6 @@ function Base.copy(S::ProdOp{T}) where T
   return ProdOp(A,B)
 end
 
-Base.:*(::Type{<:ProdOp}, A, B) = ProdOp(A, B)
-Base.:*(::Type{<:ProdOp}, A, args...) = ProdOp(A, *(ProdOp, args...))
-Base.:∘(A::AbstractLinearOperator, B::AbstractLinearOperator) = ProdOp(A, B)
-
 storage_type(op::ProdOp) = typeof(op.Mv5)
 
 mutable struct ProdNormalOp{T,S,U,V <: AbstractVector{T}} <: AbstractLinearOperator{T}
diff --git a/test/runtests.jl b/test/runtests.jl
index a06671e..fc57110 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -14,6 +14,7 @@ areTypesDefined = @isdefined arrayTypes
 arrayTypes = areTypesDefined ? arrayTypes : [Array] #, JLArray]
 
 @testset "LinearOperatorCollection" begin
+  include("testAqua.jl")
   include("testNormalOp.jl")
   include("testOperators.jl")
 end
diff --git a/test/testAqua.jl b/test/testAqua.jl
new file mode 100644
index 0000000..47c7ece
--- /dev/null
+++ b/test/testAqua.jl
@@ -0,0 +1,2 @@
+using Aqua
+Aqua.test_all(LinearOperatorCollection)
\ No newline at end of file