diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 48ab831..2a76a36 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,8 +20,8 @@ jobs:
       - name: Set up Elixir
         uses: erlef/setup-beam@v1
         with:
-          otp-version: '25.1' # Define the OTP version [required]
-          elixir-version: '1.14.0' # Define the elixir version [required]
+          otp-version: '26.2.1'
+          elixir-version: '1.16.3-otp-26'
       - name: Install testbed dependencies
         run: mix deps.get
         working-directory: live_elements_testbed
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..4060ae0
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1,2 @@
+elixir 1.16.3-otp-26
+erlang 26.2.1
diff --git a/test/live_elements_testbed_web/features/simple_guy_test.exs b/test/live_elements_testbed_web/features/simple_guy_test.exs
index 4f7e56e..74e671b 100644
--- a/test/live_elements_testbed_web/features/simple_guy_test.exs
+++ b/test/live_elements_testbed_web/features/simple_guy_test.exs
@@ -5,9 +5,13 @@ defmodule LiveElementsTestbedWeb.Features.SimpleGuyTest do
   import Wallaby.Query
 
   feature "simple guy", %{session: session} do
-    session
+    session = session
     |> visit("/simple_guy")
     |> assert_has(css("simple-guy"))
+
+    :timer.sleep(100)
+
+    session
     |> find(css("simple-guy"))
     |> shadow_root()
     |> assert_has(css("div", text: "My name is Bob and I am 11 years old"))
diff --git a/test/live_elements_testbed_web/features/todo_list_test.exs b/test/live_elements_testbed_web/features/todo_list_test.exs
index 7a7e4b6..5756565 100644
--- a/test/live_elements_testbed_web/features/todo_list_test.exs
+++ b/test/live_elements_testbed_web/features/todo_list_test.exs
@@ -14,6 +14,8 @@ defmodule LiveElementsTestbedWeb.Features.TodoListTest do
     |> fill_in(css("input[name='todo']"), with: "Do a thing")
     |> click(css("button"))
 
+    :timer.sleep(100)
+
     session
     |> find(css("todo-list"))
     |> shadow_root()