diff --git a/optimism/scripts/op-node-start.sh b/optimism/scripts/op-node-start.sh
index b04d05d4..10eee15d 100755
--- a/optimism/scripts/op-node-start.sh
+++ b/optimism/scripts/op-node-start.sh
@@ -1,5 +1,8 @@
 #!/bin/sh
-set -eou
+set -eoux
+
+echo $OPTIMISM_L1_URL
+echo $OP_NODE__RPC_TYPE
 
 # Start op-node.
 exec op-node \