diff --git a/.github/workflows/GPU.yml b/.github/workflows/GPU.yml
deleted file mode 100644
index d1655435..00000000
--- a/.github/workflows/GPU.yml
+++ /dev/null
@@ -1,65 +0,0 @@
-name: "GPU Tests"
-
-on:
-  pull_request:
-    branches:
-      - main
-    paths-ignore:
-      - 'docs/**'
-  push:
-    branches:
-      - main
-    paths-ignore:
-      - 'docs/**'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: ${{ github.ref_name != github.event.repository.default_branch || github.ref != 'refs/tags/v*' }}
-
-jobs:
-  cuda-tests:
-    name: "CUDA GPU Tests"
-    runs-on: [self-hosted, Linux, X64, gpu]
-    timeout-minutes: 240
-    steps:
-      - uses: actions/checkout@v6
-      - uses: julia-actions/setup-julia@v3
-        with:
-          version: "1"
-      - uses: julia-actions/julia-buildpkg@v1
-      - uses: julia-actions/julia-runtest@v1
-        env:
-          BACKEND_GROUP: "CUDA"
-      - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v7
-        with:
-          files: lcov.info
-          token: ${{ secrets.CODECOV_TOKEN }}
-          fail_ci_if_error: false
-
-  gpu-docs:
-    name: "Documentation"
-    runs-on: [self-hosted, Linux, X64, gpu]
-    timeout-minutes: 240
-    if: github.event_name == 'push' || !github.event.pull_request.draft
-    steps:
-      - uses: actions/checkout@v6
-      - uses: julia-actions/setup-julia@v3
-        with:
-          version: "1"
-      - run: |
-          julia --project --color=yes --threads=3 -e '
-            println("--- Instantiating project")
-            using Pkg
-            Pkg.instantiate()
-            Pkg.activate("docs")
-            Pkg.develop(PackageSpec(path=pwd()))
-            Pkg.instantiate()
-            println("+++ Building documentation")
-            include("docs/make.jl")'
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
-          DATADEPS_ALWAYS_ACCEPT: true
-          JULIA_DEBUG: "Documenter"
-          GKSwstype: "100"
diff --git a/.github/workflows/Tests.yml b/.github/workflows/Tests.yml
index 2e073536..b3fb879c 100644
--- a/.github/workflows/Tests.yml
+++ b/.github/workflows/Tests.yml
@@ -17,18 +17,5 @@ concurrency:
 
 jobs:
   tests:
-    name: "Tests"
-    strategy:
-      fail-fast: false
-      matrix:
-        group:
-          - CPU
-          - QA
-        version:
-          - 'lts'
-          - '1'
-    uses: "SciML/.github/.github/workflows/tests.yml@v1"
-    with:
-      julia-version: "${{ matrix.version }}"
-      group: "${{ matrix.group }}"
+    uses: "SciML/.github/.github/workflows/grouped-tests.yml@v1"
     secrets: "inherit"
diff --git a/Project.toml b/Project.toml
index 844fb0c1..f8031e5b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -46,11 +46,11 @@ NonlinearSolve = "4"
 NonlinearSolveBase = "1.5, 2"
 OrdinaryDiffEq = "6.74, 7"
 OrdinaryDiffEqAdamsBashforthMoulton = "1, 2"
-Pkg = "1.10"
 PrecompileTools = "1.2.1"
 Random = "1.10"
 SciMLBase = "2, 3.3"
 SciMLSensitivity = "7.43"
+SciMLTesting = "1"
 StableRNGs = "1"
 Static = "1"
 SteadyStateDiffEq = "2.5.0"
@@ -73,11 +73,11 @@ NLsolve = "2774e3e8-f4cf-5e23-947b-6d7e65073b56"
 NonlinearSolve = "8913a72c-1f9b-4ce2-8d82-65094dcecaec"
 OrdinaryDiffEq = "1dea7af3-3e70-54e6-95c3-0bf5283fa5ed"
 OrdinaryDiffEqAdamsBashforthMoulton = "89bda076-bce5-4f1c-845f-551c83cdda9a"
-Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 SciMLSensitivity = "1ed8b502-d754-442c-8d5d-10ac956f44a1"
+SciMLTesting = "09d9d899-5365-40a9-917a-5f67fddea283"
 StableRNGs = "860ef19b-820b-49d6-a774-d7a799459cd3"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [targets]
-test = ["Aqua", "Documenter", "ExplicitImports", "ForwardDiff", "Functors", "GPUArraysCore", "InteractiveUtils", "LuxTestUtils", "MLDataDevices", "NLsolve", "NonlinearSolve", "OrdinaryDiffEq", "OrdinaryDiffEqAdamsBashforthMoulton", "Pkg", "SafeTestsets", "SciMLSensitivity", "StableRNGs", "Test", "Zygote"]
+test = ["Aqua", "Documenter", "ExplicitImports", "ForwardDiff", "Functors", "GPUArraysCore", "InteractiveUtils", "LuxTestUtils", "MLDataDevices", "NLsolve", "NonlinearSolve", "OrdinaryDiffEq", "OrdinaryDiffEqAdamsBashforthMoulton", "SafeTestsets", "SciMLSensitivity", "SciMLTesting", "StableRNGs", "Test", "Zygote"]
diff --git a/test/qa/Project.toml b/test/qa/Project.toml
new file mode 100644
index 00000000..123b618f
--- /dev/null
+++ b/test/qa/Project.toml
@@ -0,0 +1,29 @@
+[deps]
+Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
+DeepEquilibriumNetworks = "6748aba7-0e9b-415e-a410-ae3cc0ecb334"
+Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+ExplicitImports = "7d51a73a-1435-4ff3-83d9-f097790105c7"
+Lux = "b2108857-7c20-44ae-9111-449ecde12c47"
+NonlinearSolve = "8913a72c-1f9b-4ce2-8d82-65094dcecaec"
+OrdinaryDiffEq = "1dea7af3-3e70-54e6-95c3-0bf5283fa5ed"
+Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
+SciMLSensitivity = "1ed8b502-d754-442c-8d5d-10ac956f44a1"
+SciMLTesting = "09d9d899-5365-40a9-917a-5f67fddea283"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[sources]
+DeepEquilibriumNetworks = {path = "../.."}
+
+[compat]
+Aqua = "0.8"
+Documenter = "1"
+ExplicitImports = "1"
+Lux = "1"
+NonlinearSolve = "4"
+OrdinaryDiffEq = "6.74, 7"
+Random = "1.10"
+SciMLSensitivity = "7.43"
+SciMLTesting = "1"
+Test = "1.10"
+julia = "1.10"
diff --git a/test/qa_tests.jl b/test/qa/qa.jl
similarity index 100%
rename from test/qa_tests.jl
rename to test/qa/qa.jl
diff --git a/test/runtests.jl b/test/runtests.jl
index 15d788cf..e35b82b2 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,17 +1,27 @@
-using Pkg
-using SafeTestsets, Test
+using SciMLTesting
+using SafeTestsets
 
-const GROUP = uppercase(get(ENV, "GROUP", "CPU"))
-
-@info "Running tests for GROUP: $GROUP"
-
-@time begin
-    if GROUP == "CPU" || GROUP == "ALL"
-        @time @safetestset "Utils Tests" include("utils_tests.jl")
-        @time @safetestset "Layers Tests" include("layers_tests.jl")
-    end
-
-    if GROUP == "QA"
-        @time @safetestset "Quality Assurance Tests" include("qa_tests.jl")
-    end
+# DEQ's GROUP semantics are backend/capability-based, not folder-partitioned: the
+# GPU group runs the *same* Core test files (utils_tests.jl + layers_tests.jl)
+# with shared_testsetup.jl's backend switched to CUDA via BACKEND_GROUP, so it
+# cannot be expressed as a separate folder of files. Hence explicit-args run_tests.
+function core_body()
+    @safetestset "Utils Tests" include("utils_tests.jl")
+    @safetestset "Layers Tests" include("layers_tests.jl")
 end
+
+run_tests(;
+    core = core_body,
+    groups = Dict(
+        # GPU is the self-hosted CUDA runner lane: the same Core suite with the
+        # backend switched to CUDA.
+        "GPU" => () -> begin
+            ENV["BACKEND_GROUP"] = "CUDA"
+            core_body()
+        end,
+    ),
+    qa = (; env = joinpath(@__DIR__, "qa"), body = joinpath(@__DIR__, "qa", "qa.jl")),
+    # Curated "All": run only Core. GPU (self-hosted CUDA lane) and QA stay
+    # selectable by name but out of the aggregate.
+    all = ["Core"],
+)
diff --git a/test/shared_testsetup.jl b/test/shared_testsetup.jl
index 01c900b8..d83f4a9a 100644
--- a/test/shared_testsetup.jl
+++ b/test/shared_testsetup.jl
@@ -14,7 +14,7 @@ end
 
 GPUArraysCore.allowscalar(false)
 
-cpu_testing() = BACKEND_GROUP == "all" || BACKEND_GROUP == "cpu"
+cpu_testing() = BACKEND_GROUP == "all" || BACKEND_GROUP == "cpu" || BACKEND_GROUP == "core"
 function cuda_testing()
     return (BACKEND_GROUP == "all" || BACKEND_GROUP == "cuda") &&
         MLDataDevices.functional(CUDADevice)
diff --git a/test/test_groups.toml b/test/test_groups.toml
new file mode 100644
index 00000000..2f61e5bc
--- /dev/null
+++ b/test/test_groups.toml
@@ -0,0 +1,10 @@
+[Core]
+versions = ["lts", "1"]
+
+[QA]
+versions = ["lts", "1"]
+
+[GPU]
+versions = ["1"]
+runner = ["self-hosted", "Linux", "X64", "gpu"]
+timeout = 240