diff --git a/.github/workflows/Downgrade.yml b/.github/workflows/Downgrade.yml
index 135b68b6..88863f61 100644
--- a/.github/workflows/Downgrade.yml
+++ b/.github/workflows/Downgrade.yml
@@ -21,4 +21,5 @@ jobs:
     with:
       julia-version: "${{ matrix.julia-version }}"
       group: "${{ matrix.group }}"
+      projects: ".,test"
     secrets: "inherit"
diff --git a/Project.toml b/Project.toml
index 2a3465d3..2288f5f1 100644
--- a/Project.toml
+++ b/Project.toml
@@ -68,7 +68,7 @@ OpenCL = "0.10"
 Parameters = "0.13"
 Random = "1"
 RecursiveArrayTools = "4.2"
-SciMLBase = "3.35.1"
+SciMLBase = "3.40"
 SciMLPublic = "1"
 Setfield = "1"
 SimpleDiffEq = "1.11"
diff --git a/test/Project.toml b/test/Project.toml
index 8748036f..38410970 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -15,6 +15,7 @@ ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
 OpenCL = "08131aa3-fb12-5dee-8b74-c09406e224a2"
 Optimization = "7f7a1694-90dd-40f0-9382-eb1efda571ba"
 OptimizationOptimisers = "42dfb2eb-d2b4-4451-abcd-913932933ac1"
+OrderedCollections = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
 OrdinaryDiffEq = "1dea7af3-3e70-54e6-95c3-0bf5283fa5ed"
 OrdinaryDiffEqRosenbrock = "43230ef6-c299-4910-a778-202eb28ce4ce"
 OrdinaryDiffEqSDIRK = "2d112036-d095-4a1e-ab9a-08536f3ecdbf"
@@ -47,12 +48,13 @@ ModelingToolkit = "11.30.1"
 OpenCL = "0.10"
 Optimization = "5"
 OptimizationOptimisers = "0.3"
+OrderedCollections = "1"
 OrdinaryDiffEq = "7"
 OrdinaryDiffEqRosenbrock = "2.6.0"
-OrdinaryDiffEqSDIRK = "2"
+OrdinaryDiffEqSDIRK = "2.8.2"
 OrdinaryDiffEqStabilizedRK = "2"
 SafeTestsets = "0.1"
-SciMLBase = "3.35.1"
+SciMLBase = "3.40"
 StaticArrays = "1.9.14"
 Statistics = "1"
 StochasticDiffEq = "7.1"