diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b966b01a..0c35bdd3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -105,7 +105,7 @@ jobs:
             elixir: "1.15.4"
             test_only_cassandra: true
             cassandra_version: "4.1"
-            cassandra_native_protocol: "v4"
+            cassandra_native_protocol: "v5"
 
     env:
       CASSANDRA_VERSION: ${{ matrix.server_versions.cassandra }}
@@ -161,7 +161,7 @@ jobs:
       # TODO: eventually figure out why we can't run encryption tests on CI.
       - name: Run tests for Cassandra and Scylla
         if: ${{ !matrix.test_only_cassandra }}
-        run: mix test.all --trace --exclude encryption --exclude ccm
+        run: mix test.all --trace --exclude encryption --exclude ccm --only tmp
 
       - name: Run tests for Cassandra only
         if: ${{ matrix.test_only_cassandra }}
diff --git a/test/xandra/cluster_test.exs b/test/xandra/cluster_test.exs
index c2fc087f..ae75e403 100644
--- a/test/xandra/cluster_test.exs
+++ b/test/xandra/cluster_test.exs
@@ -917,6 +917,13 @@ defmodule Xandra.ClusterTest do
     end
   end
 
+  @tag :tmp
+  @tag :toxiproxy
+  test "[tmp] Toxiproxy goes through", %{base_options: opts} do
+    opts = Keyword.merge(opts, sync_connect: 1000, nodes: ["127.0.0.1:19052"])
+    assert {:ok, _pid} = start_supervised({Cluster, opts})
+  end
+
   defp get_state(cluster) do
     assert {_state, data} = :sys.get_state(cluster)
     data