diff --git a/.github/workflows/__local-bundle.yml b/.github/workflows/__local-bundle.yml
index 159d8c455..3fc89f381 100644
--- a/.github/workflows/__local-bundle.yml
+++ b/.github/workflows/__local-bundle.yml
@@ -32,6 +32,11 @@ on:
         description: The version of Python to install
         required: false
         default: '3.13'
+      dotnet-version:
+        type: string
+        description: The version of .NET to install
+        required: false
+        default: 9.x
   workflow_call:
     inputs:
       go-version:
@@ -44,6 +49,11 @@ on:
         description: The version of Python to install
         required: false
         default: '3.13'
+      dotnet-version:
+        type: string
+        description: The version of .NET to install
+        required: false
+        default: 9.x
 defaults:
   run:
     shell: bash
@@ -85,6 +95,10 @@ jobs:
         uses: actions/setup-python@v6
         with:
           python-version: ${{ inputs.python-version || '3.13' }}
+      - name: Install .NET
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: ${{ inputs.dotnet-version || '9.x' }}
       - name: Fetch latest CodeQL bundle
         run: |
           wget https://github.com/github/codeql-action/releases/latest/download/codeql-bundle-linux64.tar.zst
diff --git a/pr-checks/checks/local-bundle.yml b/pr-checks/checks/local-bundle.yml
index 449dcbbb1..c0930772e 100644
--- a/pr-checks/checks/local-bundle.yml
+++ b/pr-checks/checks/local-bundle.yml
@@ -3,6 +3,7 @@ description: "Tests using a CodeQL bundle from a local file rather than a URL"
 versions: ["linked"]
 installGo: true
 installPython: true
+installDotNet: true
 steps:
   - name: Fetch latest CodeQL bundle
     run: |
diff --git a/pr-checks/sync.py b/pr-checks/sync.py
index f247f3824..77816be76 100755
--- a/pr-checks/sync.py
+++ b/pr-checks/sync.py
@@ -204,6 +204,25 @@ for file in sorted((this_dir / 'checks').glob('*.yml')):
             }
         })
 
+    installDotNet = is_truthy(checkSpecification.get('installDotNet', ''))
+
+    if installDotNet:
+        baseDotNetVersionExpr = '9.x'
+        workflowInputs['dotnet-version'] = {
+            'type': 'string',
+            'description': 'The version of .NET to install',
+            'required': False,
+            'default': baseDotNetVersionExpr,
+        }
+
+        steps.append({
+            'name': 'Install .NET',
+            'uses': 'actions/setup-dotnet@v5',
+            'with': {
+                'dotnet-version': '${{ inputs.dotnet-version || \'' + baseDotNetVersionExpr + '\' }}'
+            }
+        })
+
     # If container initialisation steps are present in the check specification,
     # make sure to execute them first.
     if 'container' in checkSpecification and 'container-init-steps' in checkSpecification: