diff --git a/compose/docker-compose-fixturenet-optimism.yml b/compose/docker-compose-fixturenet-optimism.yml
index 2354419..970c92a 100644
--- a/compose/docker-compose-fixturenet-optimism.yml
+++ b/compose/docker-compose-fixturenet-optimism.yml
@@ -91,6 +91,7 @@ services:
     environment:
       - CERC_SCRIPT_DEBUG
       - CERC_L1_RPC
+      - CERC_L1_RPC_KIND
       - CERC_L1_BLOCK_TIME
     volumes:
       - ../config/fixturenet-optimism/run-op-node.sh:/run-op-node.sh
diff --git a/config/fixturenet-optimism/l1-params.env b/config/fixturenet-optimism/l1-params.env
index b7c993f..0d3b206 100644
--- a/config/fixturenet-optimism/l1-params.env
+++ b/config/fixturenet-optimism/l1-params.env
@@ -6,8 +6,11 @@ DEFAULT_CERC_L1_RPC="http://fixturenet-eth-geth-1:8545"
 DEFAULT_CERC_L1_HOST="fixturenet-eth-geth-1"
 DEFAULT_CERC_L1_PORT=8545
 
-# Default block time to match L1 fixturenet config
+# Default block time matches L1 fixturenet config.
 DEFAULT_CERC_L1_BLOCK_TIME=3
+# This can optionally be set to a preset for common node providers like Infura, Alchemy, etc.
+# Or, set to "any" to try all available methods.
+DEFAULT_CERC_L1_RPC_KIND=standard
 
 # URL to get CSV with credentials for accounts on L1
 # that are used to send balance to Optimism Proxy contract
diff --git a/config/fixturenet-optimism/run-op-node.sh b/config/fixturenet-optimism/run-op-node.sh
index 0b1e5e2..3413897 100755
--- a/config/fixturenet-optimism/run-op-node.sh
+++ b/config/fixturenet-optimism/run-op-node.sh
@@ -5,6 +5,7 @@ if [ -n "$CERC_SCRIPT_DEBUG" ]; then
 fi
 
 CERC_L1_RPC="${CERC_L1_RPC:-${DEFAULT_CERC_L1_RPC}}"
+CERC_L1_RPC_KIND="${CERC_L1_RPC_KIND:-${DEFAULT_CERC_L1_RPC_KIND}}"
 CERC_L1_BLOCK_TIME="${CERC_L1_BLOCK_TIME:-$DEFAULT_CERC_L1_BLOCK_TIME}"
 
 # Start op-node
@@ -12,7 +13,6 @@ rollup_config=/l2-config/rollup.json
 seq_key=$(cat /l2-accounts/accounts.json | jq -r .SeqKey)
 jwt_file=/l2-config/l2-jwt.txt
 l2_auth="http://op-geth:8551"
-rpc_kind=any # this can optionally be set to a preset for common node providers like Infura, Alchemy, etc.
 
 exec op-node \
   --l2=$l2_auth \
@@ -27,7 +27,7 @@ exec op-node \
   --rpc.enable-admin \
   --p2p.sequencer.key="${SEQ_KEY#0x}" \
   --l1=$CERC_L1_RPC \
-  --l1.rpckind=$rpc_kind \
+  --l1.rpckind=$CERC_L1_RPC_KIND \
   --l1.beacon=http://fixturenet-eth-lighthouse-1:8001 \
   --l1.http-poll-interval="${CERC_L1_BLOCK_TIME}s" \
   --l1.epoch-poll-interval="$((CERC_L1_BLOCK_TIME * 32))s"