diff --git a/.github/workflows/auto-rebase.yml b/.github/workflows/auto-rebase.yml
index 0316b303..c2ae47d4 100644
--- a/.github/workflows/auto-rebase.yml
+++ b/.github/workflows/auto-rebase.yml
@@ -6,7 +6,7 @@ jobs:
   rebase:
     name: Rebase
     if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase')
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     steps:
     - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
     - name: Automatic Rebase
diff --git a/.github/workflows/exercise-tests.yml b/.github/workflows/exercise-tests.yml
index c8e84d7c..d82e4545 100644
--- a/.github/workflows/exercise-tests.yml
+++ b/.github/workflows/exercise-tests.yml
@@ -17,8 +17,8 @@ on:
 
 jobs:
   test:
-    name: Julia ${{ matrix.julia-version }} - ubuntu-24.04
-    runs-on: ubuntu-24.04
+    name: Julia ${{ matrix.julia-version }} - ubuntu-26.04
+    runs-on: ubuntu-26.04
     strategy:
       fail-fast: false
       matrix:
@@ -28,8 +28,6 @@ jobs:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
 
       - uses: julia-actions/setup-julia@fa02766e078afaaf09b14210362cee14137e6a32
-        with:
-          version: ${{ matrix.julia-version }}
 
       - uses: julia-actions/cache@a45e8fa8be21c18a06b7177052533149e61e9b38
 
@@ -41,7 +39,7 @@ jobs:
 
   test-runner:
     name: Julia Test Runner
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
 
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
@@ -49,6 +47,10 @@ jobs:
       - name: Pull julia-test-runner image
         run: docker pull exercism/julia-test-runner
 
+      - uses: julia-actions/setup-julia@fa02766e078afaaf09b14210362cee14137e6a32
+        with:
+          version: nightly
+
       - name: Install Julia dependencies
         run: julia --color=yes --project -e "using Pkg; Pkg.instantiate()"