diff --git a/.github/workflows/opencode.yaml b/.github/workflows/opencode.yaml
index 6f91052f..58f9d4e7 100644
--- a/.github/workflows/opencode.yaml
+++ b/.github/workflows/opencode.yaml
@@ -12,7 +12,7 @@ jobs:
       startsWith(github.event.comment.body, '/oc') ||
       contains(github.event.comment.body, ' /opencode') ||
       startsWith(github.event.comment.body, '/opencode')
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     permissions:
       id-token: write
       contents: read
diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 91cb73e2..b8078bf8 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -2,13 +2,17 @@ name: pre-commit
 
 on: [push]
 
+concurrency:
+  group: ${{ github.workflow }}-pr-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
 env:
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
 jobs:
   pre-commit:
     name: pre-commit
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     steps:
       - name: Checkout repo
         uses: actions/checkout@v5
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 4fc20263..288f4581 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -2,6 +2,10 @@ name: tests-boa
 
 on: [push]
 
+concurrency:
+  group: ${{ github.workflow }}-pr-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
 env:
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   HYPOTHESIS_PROFILE: no-shrink
@@ -9,7 +13,7 @@ env:
 jobs:
   tests:
     name: ${{ matrix.folder }}
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-32vcpu-ubuntu-2204
     strategy:
       fail-fast: false
       matrix: