diff --git a/.github/workflows/Test.yml b/.github/workflows/Test.yml
index f91ce0853..17da81601 100644
--- a/.github/workflows/Test.yml
+++ b/.github/workflows/Test.yml
@@ -25,11 +25,12 @@ jobs:
       actions: write
       contents: read
     strategy:
-      fail-fast: true  # TODO: toggle
+      fail-fast: false  # TODO: toggle
       matrix:
         version:
           - "1.10"
           - "1"
+          - "pre"
         group:
           - Core/Internals
           - Back/DifferentiateWith
@@ -56,6 +57,8 @@ jobs:
         exclude:
           - skip_lts: true
             version: "1.10"
+          - skip_lts: true
+            version: "pre"
           - version: "1"
             group: Back/ChainRules
     env:
@@ -97,11 +100,12 @@ jobs:
       actions: write
       contents: read
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
         version:
           - "1.10"
           - "1"
+          - "pre"
         group:
           - Formalities
           - Zero
@@ -112,6 +116,8 @@ jobs:
         exclude:
           - skip_lts: true
             version: "1.10"
+          - skip_lts: true
+            version: "pre"
     env:
       JULIA_DIT_TEST_GROUP: ${{ matrix.group }}
       JULIA_DI_PR_DRAFT: ${{ github.event.pull_request.draft }}
diff --git a/DifferentiationInterface/test/Core/Internals/_formalities.jl b/DifferentiationInterface/test/Core/Internals/_formalities.jl
index bf851018f..e7fd53ac0 100644
--- a/DifferentiationInterface/test/Core/Internals/_formalities.jl
+++ b/DifferentiationInterface/test/Core/Internals/_formalities.jl
@@ -16,7 +16,9 @@ using SparseArrays
 end
 
 @testset "JET" begin
-    JET.test_package(DifferentiationInterface; target_defined_modules=true)
+    if VERSION < v"1.12"
+        JET.test_package(DifferentiationInterface; target_defined_modules=true)
+    end
 end
 
 @testset "JuliaFormatter" begin
diff --git a/DifferentiationInterfaceTest/Project.toml b/DifferentiationInterfaceTest/Project.toml
index a1aac1eca..f82fcf8ed 100644
--- a/DifferentiationInterfaceTest/Project.toml
+++ b/DifferentiationInterfaceTest/Project.toml
@@ -50,7 +50,7 @@ FiniteDifferences = "0.12"
 Flux = "0.16"
 ForwardDiff = "0.10.36,1"
 Functors = "0.4, 0.5"
-JET = "0.4 - 0.8, 0.9"
+JET = "0.4 - 0.8, 0.9, 0.10"
 JLArrays = "0.1, 0.2"
 JuliaFormatter = "1"
 LinearAlgebra = "<0.0.1,1"
diff --git a/DifferentiationInterfaceTest/test/formalities.jl b/DifferentiationInterfaceTest/test/formalities.jl
index ab434acd5..e5d5194c5 100644
--- a/DifferentiationInterfaceTest/test/formalities.jl
+++ b/DifferentiationInterfaceTest/test/formalities.jl
@@ -18,7 +18,9 @@ end
     )
 end
 @testset verbose = true "JET" begin
-    JET.test_package(DifferentiationInterfaceTest; target_defined_modules=true)
+    if VERSION < v"1.12"
+        JET.test_package(DifferentiationInterfaceTest; target_defined_modules=true)
+    end
 end
 
 @testset "Documentation" begin