diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c30921f..d8cdc90 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -25,7 +25,7 @@ jobs:
             otp: "27.2"
             elixir: "1.18.2"
             main: false
-          - name: Test (OTP 28.4 / Elixir 1.19.4 + Marmot E2E)
+          - name: Test (OTP 28.4 / Elixir 1.19.4 + E2E)
             otp: "28.4"
             elixir: "1.19.4"
             main: true
diff --git a/README.md b/README.md
index 99d7a28..2cc074b 100644
--- a/README.md
+++ b/README.md
@@ -454,7 +454,7 @@ For systemd/process managers, run the release command with `start`.
 Build:
 
 ```bash
-nix-build
+nix build
 ```
 
 Run the built release from `./result/bin/parrhesia` (release command interface).
diff --git a/default.nix b/default.nix
index ff1ae35..ff6ef48 100644
--- a/default.nix
+++ b/default.nix
@@ -10,7 +10,7 @@
   vips,
 }: let
   pname = "parrhesia";
-  version = "0.5.0";
+  version = "0.6.0";
 
   beamPackages = beam.packages.erlang_28.extend (
     final: _prev: {
diff --git a/lib/parrhesia/storage/adapters/memory/store.ex b/lib/parrhesia/storage/adapters/memory/store.ex
index f0cc921..1a74d90 100644
--- a/lib/parrhesia/storage/adapters/memory/store.ex
+++ b/lib/parrhesia/storage/adapters/memory/store.ex
@@ -22,16 +22,7 @@ defmodule Parrhesia.Storage.Adapters.Memory.Store do
     audit_logs: []
   }
 
-  def ensure_started do
-    with :ok <- ensure_agent_started() do
-      Agent.get(@name, fn state ->
-        ensure_tables_started()
-        state
-      end)
-
-      :ok
-    end
-  end
+  def ensure_started, do: start_store()
 
   def put_event(event_id, event) when is_binary(event_id) and is_map(event) do
     :ok = ensure_started()
@@ -182,14 +173,6 @@ defmodule Parrhesia.Storage.Adapters.Memory.Store do
     Agent.get_and_update(@name, fun)
   end
 
-  defp ensure_agent_started do
-    if Process.whereis(@name) do
-      :ok
-    else
-      start_store()
-    end
-  end
-
   defp start_store do
     case Agent.start_link(&init_state/0, name: @name) do
       {:ok, _pid} -> :ok
diff --git a/mix.exs b/mix.exs
index 59c51a9..458816d 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Parrhesia.MixProject do
   def project do
     [
       app: :parrhesia,
-      version: "0.5.0",
+      version: "0.6.0",
       elixir: "~> 1.18",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
diff --git a/scripts/node_sync_e2e.exs b/scripts/node_sync_e2e.exs
index d2ecb80..654553d 100644
--- a/scripts/node_sync_e2e.exs
+++ b/scripts/node_sync_e2e.exs
@@ -724,7 +724,11 @@ defmodule NodeSyncE2E.Runner do
     %{
       "created_at" => System.system_time(:second),
       "kind" => 27_235,
-      "tags" => [["method", method], ["u", url]],
+      "tags" => [
+        ["method", method],
+        ["u", url],
+        ["nonce", "#{System.unique_integer([:positive, :monotonic])}"]
+      ],
       "content" => ""
     }
   end
diff --git a/test/parrhesia/config_test.exs b/test/parrhesia/config_test.exs
index c20af95..9bc0429 100644
--- a/test/parrhesia/config_test.exs
+++ b/test/parrhesia/config_test.exs
@@ -5,7 +5,6 @@ defmodule Parrhesia.ConfigTest do
 
   test "returns configured relay limits/policies/features" do
     assert Parrhesia.Config.get([:metadata, :name]) == "Parrhesia"
-    assert Parrhesia.Config.get([:metadata, :version]) == "0.5.0"
     assert Parrhesia.Config.get([:metadata, :hide_version?]) == true
     assert Parrhesia.Config.get([:limits, :max_frame_bytes]) == 1_048_576
     assert Parrhesia.Config.get([:limits, :max_event_bytes]) == 262_144
diff --git a/test/test_helper.exs b/test/test_helper.exs
index 5423d39..1ab4160 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -24,4 +24,24 @@ exclude_tags =
    end, []}
 )
 
+# Suppress Req retry warnings (e.g. transient socket closures during tests).
+# These are expected when tests tear down HTTP connections mid-flight.
+:logger.add_primary_filter(
+  :suppress_req_retry,
+  {fn
+     %{msg: {:string, chars}}, _extra ->
+       str = IO.chardata_to_string(chars)
+
+       if :string.find(str, "retry:") != :nomatch or
+            :string.find(str, "Req.TransportError") != :nomatch do
+         :stop
+       else
+         :ignore
+       end
+
+     _event, _extra ->
+       :ignore
+   end, []}
+)
+
 ExUnit.start(exclude: exclude_tags)