diff --git a/test/fun_with_flags/supervisor_test.exs b/test/fun_with_flags/supervisor_test.exs
index 6c490d74..fc755585 100644
--- a/test/fun_with_flags/supervisor_test.exs
+++ b/test/fun_with_flags/supervisor_test.exs
@@ -1,5 +1,6 @@
 defmodule FunWithFlags.SupervisorTest do
   use FunWithFlags.TestCase, async: false
+  import FunWithFlags.TestUtils
 
   alias FunWithFlags.Config
 
@@ -20,7 +21,7 @@ defmodule FunWithFlags.SupervisorTest do
       expected = {
         :ok,
         {
-          %{intensity: 3, period: 5, strategy: :one_for_one},
+          expected_supervisor_spec(),
           [
             %{
               id: FunWithFlags.Store.Cache,
@@ -63,7 +64,7 @@ defmodule FunWithFlags.SupervisorTest do
       expected = {
         :ok,
         {
-          %{intensity: 3, period: 5, strategy: :one_for_one},
+          expected_supervisor_spec(),
           [
             %{
               id: FunWithFlags.Store.Cache,
@@ -104,7 +105,7 @@ defmodule FunWithFlags.SupervisorTest do
       expected = {
         :ok,
         {
-          %{intensity: 3, period: 5, strategy: :one_for_one},
+          expected_supervisor_spec(),
           [
             %{
               id: FunWithFlags.Store.Cache,
@@ -150,7 +151,7 @@ defmodule FunWithFlags.SupervisorTest do
       expected = {
         :ok,
         {
-          %{intensity: 3, period: 5, strategy: :one_for_one},
+          expected_supervisor_spec(),
           [
             %{
               id: Redix,
@@ -179,7 +180,7 @@ defmodule FunWithFlags.SupervisorTest do
       expected = {
         :ok,
         {
-          %{intensity: 3, period: 5, strategy: :one_for_one},
+          expected_supervisor_spec(),
           [
             %{
               id: Redix,
@@ -208,7 +209,7 @@ defmodule FunWithFlags.SupervisorTest do
       expected = {
         :ok,
         {
-          %{intensity: 3, period: 5, strategy: :one_for_one},
+          expected_supervisor_spec(),
           []
         }
       }
@@ -216,4 +217,12 @@ defmodule FunWithFlags.SupervisorTest do
       assert ^expected = FunWithFlags.Supervisor.init(nil)
     end
   end
+
+  defp expected_supervisor_spec do
+    if on_elixir_15?() do
+      %{intensity: 3, period: 5, strategy: :one_for_one, auto_shutdown: :never}
+    else
+      %{intensity: 3, period: 5, strategy: :one_for_one}
+    end
+  end
 end
diff --git a/test/support/test_utils.ex b/test/support/test_utils.ex
index f58b4c5a..5e892435 100644
--- a/test/support/test_utils.ex
+++ b/test/support/test_utils.ex
@@ -83,4 +83,8 @@ defmodule FunWithFlags.TestUtils do
   def reset_app_env_to_default_redis_config do
     configure_redis_with([database: 5])
   end
+
+  def on_elixir_15? do
+    Version.match?(System.version, ">= 1.15.0")
+  end
 end