diff --git a/test/runtests.jl b/test/runtests.jl
index a18a7cc..67425de 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,2 +1,32 @@
 using SciMLTesting
-run_tests()
+using SafeTestsets
+
+# GPU's GROUP semantics are capability-based, not folder-partitioned: the GPU lane
+# runs the *same* Core test files on a CUDA-equipped runner, where the
+# `CUDA.functional()`-gated testsets inside reflect.jl/MCSample.jl self-activate.
+# It therefore cannot be a separate folder of files, so this uses explicit-args
+# run_tests rather than folder discovery.
+function core_body()
+    @safetestset "ProblemConstructors" include("ProblemConstructor.jl")
+    @safetestset "reflect" include("reflect.jl")
+    @safetestset "MLP" include("MLP.jl")
+    @safetestset "Deep Splitting" include("DeepSplitting.jl")
+    @safetestset "DeepBSDE" include("DeepBSDE.jl")
+    @safetestset "MC Sample" include("MCSample.jl")
+    @safetestset "NNStopping" include("NNStopping.jl")
+    @safetestset "NNKolmogorov" include("NNKolmogorov.jl")
+    return @safetestset "NNParamKolmogorov" include("NNParamKolmogorov.jl")
+end
+
+run_tests(;
+    core = core_body,
+    groups = Dict(
+        # GPU is the self-hosted CUDA runner lane: the same Core suite, where the
+        # CUDA-gated testsets run because CUDA.functional() is true there.
+        "GPU" => core_body,
+    ),
+    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"],
+)