test: show works even with just URL

tests/functional/test_network_manager.py

@@ -239,12 +239,15 @@ def test_parse_network_choice_multiple_contexts(
     assert eth_tester_provider.make_request("eth_chainId") == DEFAULT_TEST_CHAIN_ID
 
 
-def test_parse_network_choice_evmchains(networks):
+@pytest.mark.parametrize(
+    "connection_str", ("moonbeam:moonriver", "https://moonriver.api.onfinality.io/public")
+)
+def test_parse_network_choice_evmchains(networks, connection_str):
     """
     Show we can (without having a plugin installed) connect to a network
     that evm-chains knows about.
     """
-    with networks.parse_network_choice("moonbeam:moonriver") as moon_provider:
+    with networks.parse_network_choice(connection_str) as moon_provider:
         assert moon_provider.network.name == "moonriver"
         assert moon_provider.network.ecosystem.name == "moonbeam"