diff --git a/ci/testnet-sanity.sh b/ci/testnet-sanity.sh
index 9665e66c0..3b01a714e 100755
--- a/ci/testnet-sanity.sh
+++ b/ci/testnet-sanity.sh
@@ -52,7 +52,7 @@ fi
 
 (
   set -x
-  $cmd --count "$EXPECTED_NODE_COUNT" --converge-only
+  $cmd --num-nodes "$EXPECTED_NODE_COUNT" --converge-only
 )
 
 echo "--- $NET_URL: validator sanity"