diff --git a/.github/actions/install-agent-harnesses/action.yml b/.github/actions/install-agent-harnesses/action.yml
index c31d48fe9..83a3b9afe 100644
--- a/.github/actions/install-agent-harnesses/action.yml
+++ b/.github/actions/install-agent-harnesses/action.yml
@@ -31,7 +31,7 @@ runs:
       id: engine-sha
       shell: pwsh
       env:
-        ENGINE_SHA: ${{ inputs.engine-sha || 'da9236a6f43d47c37e0bd59ebced33b6fe73f277' }}
+        ENGINE_SHA: ${{ inputs.engine-sha || '7c7c12c2188dd7bee063f925b9d055d05075beff' }}
       run: |
         if ($env:ENGINE_SHA -notmatch '\A[0-9a-fA-F]{40}\z') {
           throw "engine-sha must be a full 40-character hexadecimal commit SHA."
diff --git a/tests/test_review_workflows.py b/tests/test_review_workflows.py
index bbaabb764..568a1aadb 100644
--- a/tests/test_review_workflows.py
+++ b/tests/test_review_workflows.py
@@ -10,7 +10,7 @@
 WORKFLOWS = Path(__file__).parents[1] / ".github" / "workflows"
 ACTIONS = Path(__file__).parents[1] / ".github" / "actions"
 AGENT_CONFIG = Path(__file__).parents[1] / "src" / "bcbench" / "agent" / "shared" / "config.yaml"
-DEFAULT_ENGINE_SHA = "da9236a6f43d47c37e0bd59ebced33b6fe73f277"
+DEFAULT_ENGINE_SHA = "7c7c12c2188dd7bee063f925b9d055d05075beff"
 PWSH = shutil.which("pwsh")