diff --git a/.github/scripts/tests/test_shared_workflow_runners.py b/.github/scripts/tests/test_shared_workflow_runners.py
new file mode 100644
index 000000000..343a03c79
--- /dev/null
+++ b/.github/scripts/tests/test_shared_workflow_runners.py
@@ -0,0 +1,24 @@
+from pathlib import Path
+
+import pytest
+import yaml
+
+
+@pytest.mark.parametrize(
+    ("filename", "job_id"),
+    [
+        ("ai-pr-review.yml", "ai-pr-review"),
+        ("issue-triage.yml", "triage"),
+        ("notify.yml", "notify"),
+        ("stale-issue-closer.yml", "close-stale"),
+    ],
+)
+def test_shared_workflow_caller_passes_codebuild_runner(
+    filename: str, job_id: str
+) -> None:
+    path = Path(__file__).parents[2] / "workflows" / filename
+    workflow = yaml.safe_load(path.read_text())
+
+    assert workflow["jobs"][job_id]["with"]["runs-on"] == (
+        "codebuild-github-actions-runner-${{ github.run_id }}-${{ github.run_attempt }}"
+    )
diff --git a/.github/workflows/ai-pr-review.yml b/.github/workflows/ai-pr-review.yml
index 94ff842c7..6094c34f8 100644
--- a/.github/workflows/ai-pr-review.yml
+++ b/.github/workflows/ai-pr-review.yml
@@ -18,8 +18,11 @@ jobs:
       contents: write
       id-token: write
       pull-requests: write
-    uses: aws/aws-durable-execution-ci/.github/workflows/ai-pr-review.yml@d6b017da14385908951d23e26c790b28a4e5f9f0
+    uses: aws/aws-durable-execution-ci/.github/workflows/ai-pr-review.yml@8ea82196db65b5b0dd67f0b72bb03fa2fa9cf65b
     with:
+      # CodeBuild-hosted runner in the Python testing account; the label must
+      # match the CodeBuild project name.
+      runs-on: codebuild-github-actions-runner-${{ github.run_id }}-${{ github.run_attempt }}
       prompt-path: .github/prompts/ai-pr-review.md
       run-claude: false
     secrets: inherit
diff --git a/.github/workflows/issue-triage.yml b/.github/workflows/issue-triage.yml
index 0a07ad1c2..e62e35eb7 100644
--- a/.github/workflows/issue-triage.yml
+++ b/.github/workflows/issue-triage.yml
@@ -12,5 +12,9 @@ jobs:
       contents: read
       id-token: write
       issues: write
-    uses: aws/aws-durable-execution-ci/.github/workflows/issue-triage.yml@d6b017da14385908951d23e26c790b28a4e5f9f0
+    uses: aws/aws-durable-execution-ci/.github/workflows/issue-triage.yml@8ea82196db65b5b0dd67f0b72bb03fa2fa9cf65b
+    with:
+      # CodeBuild-hosted runner in the Python testing account; the label must
+      # match the CodeBuild project name.
+      runs-on: codebuild-github-actions-runner-${{ github.run_id }}-${{ github.run_attempt }}
     secrets: inherit
diff --git a/.github/workflows/notify.yml b/.github/workflows/notify.yml
index c2eb601b2..0633403ce 100644
--- a/.github/workflows/notify.yml
+++ b/.github/workflows/notify.yml
@@ -16,7 +16,11 @@ jobs:
       contents: read
       models: read
       id-token: write
-    uses: aws/aws-durable-execution-ci/.github/workflows/notify.yml@d6b017da14385908951d23e26c790b28a4e5f9f0
+    uses: aws/aws-durable-execution-ci/.github/workflows/notify.yml@8ea82196db65b5b0dd67f0b72bb03fa2fa9cf65b
+    with:
+      # CodeBuild-hosted runner in the Python testing account; the label must
+      # match the CodeBuild project name.
+      runs-on: codebuild-github-actions-runner-${{ github.run_id }}-${{ github.run_attempt }}
     secrets:
       BEDROCK_ROLE_ARN: ${{ secrets.BEDROCK_ROLE_ARN }}
       SLACK_WEBHOOK_URL_PR: ${{ secrets.SLACK_WEBHOOK_URL_PR }}
diff --git a/.github/workflows/stale-issue-closer.yml b/.github/workflows/stale-issue-closer.yml
index 604383195..c2e4b354d 100644
--- a/.github/workflows/stale-issue-closer.yml
+++ b/.github/workflows/stale-issue-closer.yml
@@ -14,4 +14,8 @@ jobs:
     permissions:
       contents: read
       issues: write
-    uses: aws/aws-durable-execution-ci/.github/workflows/stale-issue-closer.yml@288e4317948ca778ebf01acca9342d8b898a1dc2
+    uses: aws/aws-durable-execution-ci/.github/workflows/stale-issue-closer.yml@8ea82196db65b5b0dd67f0b72bb03fa2fa9cf65b
+    with:
+      # CodeBuild-hosted runner in the Python testing account; the label must
+      # match the CodeBuild project name.
+      runs-on: codebuild-github-actions-runner-${{ github.run_id }}-${{ github.run_attempt }}
diff --git a/.github/workflows/test-parser.yml b/.github/workflows/test-parser.yml
index 26d2eb80f..883d85f2f 100644
--- a/.github/workflows/test-parser.yml
+++ b/.github/workflows/test-parser.yml
@@ -9,6 +9,9 @@ on:
       - '.github/scripts/js_examples/**'
       - '.github/scripts/tests/**'
       - '.github/workflows/ai-pr-review.yml'
+      - '.github/workflows/issue-triage.yml'
+      - '.github/workflows/notify.yml'
+      - '.github/workflows/stale-issue-closer.yml'
       - '.github/workflows/opentelemetry-conformance-tests.yml'
       - '.github/workflows/test-parser.yml'
       - 'packages/aws-durable-execution-sdk-python-otel/pyproject.toml'
@@ -21,6 +24,9 @@ on:
       - '.github/scripts/js_examples/**'
       - '.github/scripts/tests/**'
       - '.github/workflows/ai-pr-review.yml'
+      - '.github/workflows/issue-triage.yml'
+      - '.github/workflows/notify.yml'
+      - '.github/workflows/stale-issue-closer.yml'
       - '.github/workflows/opentelemetry-conformance-tests.yml'
       - '.github/workflows/test-parser.yml'
       - 'packages/aws-durable-execution-sdk-python-otel/pyproject.toml'
@@ -64,4 +70,5 @@ jobs:
           .github/scripts/tests/test_check_otel_wheel_dependencies.py \
           .github/scripts/tests/test_js_examples.py \
           .github/scripts/tests/test_opentelemetry_conformance_workflow.py \
-          .github/scripts/tests/test_parse_sdk_branch.py
+          .github/scripts/tests/test_parse_sdk_branch.py \
+          .github/scripts/tests/test_shared_workflow_runners.py