diff --git a/.github/workflows/CI_BoundaryValueDiffEq.yml b/.github/workflows/CI_BoundaryValueDiffEq.yml
index b01c2fb6..c8d611fb 100644
--- a/.github/workflows/CI_BoundaryValueDiffEq.yml
+++ b/.github/workflows/CI_BoundaryValueDiffEq.yml
@@ -41,8 +41,6 @@ jobs:
           - "pre"
         os:
           - ubuntu-latest
-          - macos-latest
-          - windows-latest
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
diff --git a/.github/workflows/CI_BoundaryValueDiffEqAscher.yml b/.github/workflows/CI_BoundaryValueDiffEqAscher.yml
index 3f790430..af385eb7 100644
--- a/.github/workflows/CI_BoundaryValueDiffEqAscher.yml
+++ b/.github/workflows/CI_BoundaryValueDiffEqAscher.yml
@@ -36,8 +36,6 @@ jobs:
           - core
         os:
           - ubuntu-latest
-          - macos-latest
-          - windows-latest
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
diff --git a/.github/workflows/CI_BoundaryValueDiffEqCore.yml b/.github/workflows/CI_BoundaryValueDiffEqCore.yml
index 2f147994..810612c2 100644
--- a/.github/workflows/CI_BoundaryValueDiffEqCore.yml
+++ b/.github/workflows/CI_BoundaryValueDiffEqCore.yml
@@ -35,8 +35,6 @@ jobs:
           - core
         os:
           - ubuntu-latest
-          - macos-latest
-          - windows-latest
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
diff --git a/.github/workflows/CI_BoundaryValueDiffEqFIRK.yml b/.github/workflows/CI_BoundaryValueDiffEqFIRK.yml
index 34e91fba..acd1a7eb 100644
--- a/.github/workflows/CI_BoundaryValueDiffEqFIRK.yml
+++ b/.github/workflows/CI_BoundaryValueDiffEqFIRK.yml
@@ -36,8 +36,6 @@ jobs:
           - core
         os:
           - ubuntu-latest
-          - macos-latest
-          - windows-latest
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
diff --git a/.github/workflows/CI_BoundaryValueDiffEqMIRK.yml b/.github/workflows/CI_BoundaryValueDiffEqMIRK.yml
index e21d3e3c..7743b9f1 100644
--- a/.github/workflows/CI_BoundaryValueDiffEqMIRK.yml
+++ b/.github/workflows/CI_BoundaryValueDiffEqMIRK.yml
@@ -36,8 +36,6 @@ jobs:
           - core
         os:
           - ubuntu-latest
-          - macos-latest
-          - windows-latest
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
diff --git a/.github/workflows/CI_BoundaryValueDiffEqShooting.yml b/.github/workflows/CI_BoundaryValueDiffEqShooting.yml
index aa410fe1..c3f8b585 100644
--- a/.github/workflows/CI_BoundaryValueDiffEqShooting.yml
+++ b/.github/workflows/CI_BoundaryValueDiffEqShooting.yml
@@ -36,8 +36,6 @@ jobs:
           - core
         os:
           - ubuntu-latest
-          - macos-latest
-          - windows-latest
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
diff --git a/lib/BoundaryValueDiffEqAscher/src/BoundaryValueDiffEqAscher.jl b/lib/BoundaryValueDiffEqAscher/src/BoundaryValueDiffEqAscher.jl
index 5b4b81cc..870f39e6 100644
--- a/lib/BoundaryValueDiffEqAscher/src/BoundaryValueDiffEqAscher.jl
+++ b/lib/BoundaryValueDiffEqAscher/src/BoundaryValueDiffEqAscher.jl
@@ -7,7 +7,6 @@ using ConcreteStructs
 using FastClosures
 using ForwardDiff
 using LinearAlgebra
-using NonlinearSolveFirstOrder
 using PreallocationTools
 using RecursiveArrayTools
 using Reexport
diff --git a/lib/BoundaryValueDiffEqCore/test/runtest.jl b/lib/BoundaryValueDiffEqCore/test/runtest.jl
new file mode 100644
index 00000000..72cb7cd4
--- /dev/null
+++ b/lib/BoundaryValueDiffEqCore/test/runtest.jl
@@ -0,0 +1,18 @@
+using ReTestItems, BoundaryValueDiffEqCore, Hwloc, InteractiveUtils, Pkg
+
+@info sprint(InteractiveUtils.versioninfo)
+
+const GROUP = lowercase(get(ENV, "GROUP", "All"))
+
+const RETESTITEMS_NWORKERS = parse(Int,
+    get(ENV, "RETESTITEMS_NWORKERS",
+        string(min(ifelse(Sys.iswindows(), 0, Hwloc.num_physical_cores()), 4))))
+const RETESTITEMS_NWORKER_THREADS = parse(Int,
+    get(ENV, "RETESTITEMS_NWORKER_THREADS",
+        string(max(Hwloc.num_virtual_cores() ÷ max(RETESTITEMS_NWORKERS, 1), 1))))
+
+@info "Running tests for group: $(GROUP) with $(RETESTITEMS_NWORKERS) workers"
+
+ReTestItems.runtests(
+    BoundaryValueDiffEqCore; tags = (GROUP == "all" ? nothing : [Symbol(GROUP)]),
+    nworkers = RETESTITEMS_NWORKERS, nworker_threads = RETESTITEMS_NWORKER_THREADS)
diff --git a/lib/BoundaryValueDiffEqFIRK/test/runtests.jl b/lib/BoundaryValueDiffEqFIRK/test/runtests.jl
index 83490b06..1a91fd7b 100644
--- a/lib/BoundaryValueDiffEqFIRK/test/runtests.jl
+++ b/lib/BoundaryValueDiffEqFIRK/test/runtests.jl
@@ -1,4 +1,4 @@
-using ReTestItems, BoundaryValueDiffEqFIRK, Hwloc, InteractiveUtils, Pkg
+using ReTestItems, BoundaryValueDiffEqFIRK, Hwloc, InteractiveUtils
 
 @info sprint(InteractiveUtils.versioninfo)
 
diff --git a/lib/BoundaryValueDiffEqMIRK/test/runtests.jl b/lib/BoundaryValueDiffEqMIRK/test/runtests.jl
index 24c2f717..43338555 100644
--- a/lib/BoundaryValueDiffEqMIRK/test/runtests.jl
+++ b/lib/BoundaryValueDiffEqMIRK/test/runtests.jl
@@ -1,4 +1,4 @@
-using ReTestItems, BoundaryValueDiffEqMIRK, Hwloc, InteractiveUtils, Pkg
+using ReTestItems, BoundaryValueDiffEqMIRK, Hwloc, InteractiveUtils
 
 @info sprint(InteractiveUtils.versioninfo)
 
diff --git a/lib/BoundaryValueDiffEqShooting/test/runtests.jl b/lib/BoundaryValueDiffEqShooting/test/runtests.jl
new file mode 100644
index 00000000..e599d6ef
--- /dev/null
+++ b/lib/BoundaryValueDiffEqShooting/test/runtests.jl
@@ -0,0 +1,18 @@
+using ReTestItems, BoundaryValueDiffEqShooting, Hwloc, InteractiveUtils
+
+@info sprint(InteractiveUtils.versioninfo)
+
+const GROUP = lowercase(get(ENV, "GROUP", "All"))
+
+const RETESTITEMS_NWORKERS = parse(Int,
+    get(ENV, "RETESTITEMS_NWORKERS",
+        string(min(ifelse(Sys.iswindows(), 0, Hwloc.num_physical_cores()), 4))))
+const RETESTITEMS_NWORKER_THREADS = parse(Int,
+    get(ENV, "RETESTITEMS_NWORKER_THREADS",
+        string(max(Hwloc.num_virtual_cores() ÷ max(RETESTITEMS_NWORKERS, 1), 1))))
+
+@info "Running tests for group: $(GROUP) with $(RETESTITEMS_NWORKERS) workers"
+
+ReTestItems.runtests(
+    BoundaryValueDiffEqShooting; tags = (GROUP == "all" ? nothing : [Symbol(GROUP)]),
+    nworkers = RETESTITEMS_NWORKERS, nworker_threads = RETESTITEMS_NWORKER_THREADS)