diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 582501f..d89be53 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -21,8 +21,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os:
-          - ubuntu
         ruby:
           - "3.3"
         gemfile:
@@ -33,7 +31,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
       COVERALLS: true
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index ca813f1..c9464e6 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -21,8 +21,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os:
-          - ubuntu
         ruby:
           - "3.1"
           - "3.2"
@@ -38,14 +36,13 @@ jobs:
           - ruby: "3.1"
             gemfile: gemfiles/rails_8_0.gemfile
         include:
-          - os: ubuntu
-            ruby: ruby-head
+          - ruby: ruby-head
             gemfile: gemfiles/rails_8_0.gemfile
             allow_failures: true
     env:
       BUNDLE_GEMFILE: "${{ matrix.gemfile }}"
       ALLOW_FAILURES: "${{ matrix.allow_failures }}"
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ubuntu-latest
     continue-on-error: ${{ endsWith(matrix.ruby, 'head') || matrix.ruby == 'debug' }}
     steps:
       - name: Checkout