diff --git a/test/amd/factorizations.jl b/test/amd/factorizations.jl
index a2064ebff..b65823964 100644
--- a/test/amd/factorizations.jl
+++ b/test/amd/factorizations.jl
@@ -1,5 +1,6 @@
 using Adapt, AMDGPU
 using Test, TestExtras
+using Random
 using TensorKit
 using LinearAlgebra: LinearAlgebra
 using MatrixAlgebraKit: DefaultAlgorithm, Jacobi, PolarViaSVD, QRIteration, diagview
@@ -9,6 +10,8 @@ const ROCTensorMap = getglobal(AMDGPUExt, :ROCTensorMap)
 
 using AMDGPU.rocBLAS
 
+Random.seed!(123456)
+
 spacelist = factorization_spacelist(fast_tests)
 eltypes = (Float64, ComplexF64)
 
diff --git a/test/amd/planar.jl b/test/amd/planar.jl
index 2a8fbf9c4..a18395086 100644
--- a/test/amd/planar.jl
+++ b/test/amd/planar.jl
@@ -1,6 +1,7 @@
 using Test, TestExtras
 using Adapt
 using TensorOperations, AMDGPU
+using Random
 using TensorKit
 using TensorKit: type_repr
 using TensorKit: PlanarTrivial, ℙ
@@ -10,6 +11,8 @@ const AMDGPUExt = Base.get_extension(TensorKit, :TensorKitAMDGPUExt)
 @assert !isnothing(AMDGPUExt)
 const ROCTensorMap = getglobal(AMDGPUExt, :ROCTensorMap)
 
+Random.seed!(123456)
+
 spacelist = default_spacelist(fast_tests)
 
 for V in spacelist
diff --git a/test/amd/tensors.jl b/test/amd/tensors.jl
index f6f11f1c1..93c026367 100644
--- a/test/amd/tensors.jl
+++ b/test/amd/tensors.jl
@@ -1,5 +1,6 @@
 using Adapt, AMDGPU
 using Test, TestExtras
+using Random
 using TensorKit, Combinatorics
 ad = adapt(Array)
 const AMDGPUExt = Base.get_extension(TensorKit, :TensorKitAMDGPUExt)
@@ -10,6 +11,8 @@ const rocrandn = getglobal(AMDGPUExt, :rocrandn)
 const rocrand! = getglobal(AMDGPUExt, :rocrand!)
 using AMDGPU: rand as rocrand, rand! as rocrand!, randn as rocrandn, randn! as rocrandn!
 
+Random.seed!(123456)
+
 spacelist = default_spacelist(fast_tests)
 
 for V in spacelist
diff --git a/test/cuda/factorizations.jl b/test/cuda/factorizations.jl
index b88f54e95..3c482a04c 100644
--- a/test/cuda/factorizations.jl
+++ b/test/cuda/factorizations.jl
@@ -2,6 +2,7 @@ using Adapt, CUDA, CUDA.cuRAND, cuTENSOR
 using Test, TestExtras
 using TensorKit
 using LinearAlgebra: LinearAlgebra
+using Random
 using MatrixAlgebraKit: DefaultAlgorithm, Jacobi, diagview
 const CUDAExt = Base.get_extension(TensorKit, :TensorKitCUDAExt)
 @assert !isnothing(CUDAExt) "Failed to load TensorKit - CUDA extension"
@@ -9,6 +10,8 @@ const CuTensorMap = getglobal(CUDAExt, :CuTensorMap)
 
 using CUDA.CUBLAS
 
+Random.seed!(123456)
+
 spacelist = factorization_spacelist(fast_tests)
 eltypes = (Float32, ComplexF64)
 
diff --git a/test/cuda/mooncake.jl b/test/cuda/mooncake.jl
index c0911c695..0329a399e 100644
--- a/test/cuda/mooncake.jl
+++ b/test/cuda/mooncake.jl
@@ -4,6 +4,7 @@ using Mooncake
 using Random
 using CUDA, cuTENSOR, Adapt
 
+Random.seed!(123456)
 rng = Random.default_rng()
 
 spacelist = ad_spacelist(fast_tests)
diff --git a/test/cuda/planar.jl b/test/cuda/planar.jl
index 4603266a5..2d992023b 100644
--- a/test/cuda/planar.jl
+++ b/test/cuda/planar.jl
@@ -1,6 +1,7 @@
 using Test, TestExtras
 using Adapt
 using TensorOperations, CUDA, cuTENSOR
+using Random
 using TensorKit
 using TensorKit: type_repr
 using TensorKit: PlanarTrivial, ℙ
@@ -10,6 +11,8 @@ const CUDAExt = Base.get_extension(TensorKit, :TensorKitCUDAExt)
 @assert !isnothing(CUDAExt)
 const CuTensorMap = getglobal(CUDAExt, :CuTensorMap)
 
+Random.seed!(123456)
+
 spacelist = default_spacelist(fast_tests)
 
 for V in spacelist
diff --git a/test/cuda/tensors.jl b/test/cuda/tensors.jl
index 973118cac..59196d52c 100644
--- a/test/cuda/tensors.jl
+++ b/test/cuda/tensors.jl
@@ -1,11 +1,14 @@
 using Adapt, CUDA, CUDA.cuRAND, cuTENSOR
 using Test, TestExtras
+using Random
 using TensorKit, Combinatorics
 ad = adapt(Array)
 const CUDAExt = Base.get_extension(TensorKit, :TensorKitCUDAExt)
 @assert !isnothing(CUDAExt)
 const CuTensorMap = getglobal(CUDAExt, :CuTensorMap)
 
+Random.seed!(123456)
+
 spacelist = default_spacelist(fast_tests)
 
 for V in spacelist