diff --git a/tests/libp2p/test_libp2p.py b/tests/libp2p/test_libp2p.py
index 7bad422e..1a8ddc36 100644
--- a/tests/libp2p/test_libp2p.py
+++ b/tests/libp2p/test_libp2p.py
@@ -4,8 +4,8 @@ from libp2p.libp2p import Libp2p
 
 @pytest.mark.asyncio
 async def test_simple_messages():
-    libA = Libp2p(transportOpt=["/ip4/127.0.0.1/tcp/8001/ipfs/hostA"])
-    libB = Libp2p(transportOpt=["/ip4/127.0.0.1/tcp/8000/ipfs/hostB"])
+    libA = Libp2p(transport_opt=["/ip4/127.0.0.1/tcp/8001/ipfs/hostA"])
+    libB = Libp2p(transport_opt=["/ip4/127.0.0.1/tcp/8000/ipfs/hostB"])
 
     hostA = await libA.new_node()
     hostB = await libB.new_node()