diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..4e597a9
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: Tests
+
+on: [pull_request, workflow_dispatch]
+
+permissions: # needed to allow julia-actions/cache to delete old caches that it has created
+  actions: write
+  contents: read
+
+jobs:
+  test: # main CI tests
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ['lts', '1', 'pre']
+        arch: [x64]
+        os: [ubuntu-latest]
+
+    steps:
+      - uses: actions/checkout@v5
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - uses: julia-actions/cache@v2
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
diff --git a/Project.toml b/Project.toml
index 1e89c3d..9faf74f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -22,8 +22,8 @@ PartitionedArrays = "5a9dfac6-5c52-46f7-8278-5e2210713be9"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 Profile = "9abbd945-dff8-562f-b5e8-e1ebf5ef1b79"
 ProfileView = "c46f51b8-102a-5cf2-8d2c-8597cb0e0da7"
-Revise = "295af30f-e4ad-537b-8983-00126c2a3abe"
 Roots = "f2b01f46-fcfa-551c-844a-d8ac1e96c665"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 TimerOutputs = "a759f4b9-e2f1-59dc-863e-4aeb61b1ea8f"
 WriteVTK = "64499a7a-5c06-52f2-abe2-ccb03c286192"
diff --git a/src/PhysicalModels/PhysicalModels.jl b/src/PhysicalModels/PhysicalModels.jl
index 015e39c..8b10ea4 100644
--- a/src/PhysicalModels/PhysicalModels.jl
+++ b/src/PhysicalModels/PhysicalModels.jl
@@ -7,10 +7,6 @@ using DrWatson
 using ForwardDiff
 using LinearAlgebra
 using ..TensorAlgebra
-using ..TensorAlgebra: _δδ_μ_3D
-using ..TensorAlgebra: _δδ_λ_3D
-using ..TensorAlgebra: _δδ_μ_2D
-using ..TensorAlgebra: _δδ_λ_2D
 using ..TensorAlgebra: _∂H∂F_2D
 using ..TensorAlgebra: I3
 using ..TensorAlgebra: I9
diff --git a/test/TestConstitutiveModels/PhysicalModels.jl b/test/TestConstitutiveModels/PhysicalModels.jl
index ef89ef4..81bf2be 100644
--- a/test/TestConstitutiveModels/PhysicalModels.jl
+++ b/test/TestConstitutiveModels/PhysicalModels.jl
@@ -1,5 +1,6 @@
 using Gridap
 using ForwardDiff
+using JSON
 using StaticArrays
 using Test
 using HyperFEM.PhysicalModels
@@ -430,7 +431,8 @@ end
     return n_layers, Weights, Biases, ϵ, β
   end
 
-  data_filename = "test/models/test_NN_TEM.json"
+  BASE_FOLDER = dirname(dirname(pathof(HyperFEM)))
+  data_filename = joinpath(BASE_FOLDER, "test/models/test_NN_TEM.json")
   n_layers, Weights, Biases, ϵ, β = ExtractingInfo(data_filename)
 
   model = ThermoElectroMech_PINNs(; W=Weights, b=Biases, ϵ=ϵ, β=β, nLayer=n_layers)
diff --git a/test/runtests.jl b/test/runtests.jl
index 8e0e807..82d8dbd 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -7,11 +7,6 @@ using Gridap.FESpaces
 using Gridap.CellData
 using Gridap.TensorValues
 using HyperFEM: jacobian, IterativeSolver, solve!
-using WriteVTK
-using Revise
-using DrWatson
-using JSON
-using ForwardDiff
 using BenchmarkTools
 
 import Base.isapprox