diff --git a/.circleci/config.yml b/.circleci/config.yml
index 45659a63e6040..633ad675dca2b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2621,6 +2621,9 @@ workflows:
         - equal: [build_daily, <<pipeline.schedule.name>>]
         # Trigger on manual triggers if explicitly requested
         - equal: [true, << pipeline.parameters.sync_test_op_node_dispatch >>]
+        # Trigger on PR branches
+        - not:
+            equal: [develop, << pipeline.git.branch >>]
     jobs:
       - initialize:
           context:
@@ -2687,24 +2690,23 @@ workflows:
           requires:
             - contracts-bedrock-build
             - cannon-prestate-quick
-      # OP Mainnet ## TODO: Need L1 Mainnet Beacon to be exposed for CI
-      # - op-acceptance-sync-tests-docker:
-      #     name: sync-test-op-mainnet-daily
-      #     gate: sync-test-op-node
-      #     no_output_timeout: 30m
-      #     l2_network_name: "op-mainnet"
-      #     l1_chain_id: "1"
-      #     l2_el_endpoint: "https://op-mainnet-rpc.optimism.io"
-      #     l1_cl_beacon_endpoint: "https://ci-mainnet-beacon.optimism.io"
-      #     l1_el_endpoint: "https://ci-mainnet-l1.optimism.io"
-      #     initial_l2_block: "140013283"
-      #     context:
-      #       - circleci-repo-readonly-authenticated-github-token
-      #       - discord
-      #     requires:
-      #       - contracts-bedrock-build
-      #       - cannon-prestate-quick
-
+      # OP Mainnet
+      - op-acceptance-sync-tests-docker:
+          name: sync-test-op-mainnet-daily
+          gate: sync-test-op-node
+          no_output_timeout: 30m
+          l2_network_name: "op-mainnet"
+          l1_chain_id: "1"
+          l2_el_endpoint: "https://op-mainnet-rpc.optimism.io"
+          l1_cl_beacon_endpoint: "https://ci-mainnet-beacon.optimism.io"
+          l1_el_endpoint: "https://ci-mainnet-l1.optimism.io"
+          initial_l2_block: "140013283"
+          context:
+            - circleci-repo-readonly-authenticated-github-token
+            - discord
+          requires:
+            - contracts-bedrock-build
+            - cannon-prestate-quick
 
   # Acceptance tests (post-merge to develop)
   acceptance-tests: