diff --git a/lib/umwelt/client/clone.ex b/lib/umwelt/client/clone.ex
index 685af24..e2d6b5e 100644
--- a/lib/umwelt/client/clone.ex
+++ b/lib/umwelt/client/clone.ex
@@ -62,6 +62,7 @@ defmodule Umwelt.Client.Clone do
   def handle_info(:maybe_stop, state) do
     if Client.Agent.completed?() do
       Logger.debug("All modules processed. Stopping application.")
+      :timer.sleep(99)
       Supervisor.stop(Client.Supervisor)
     end
 
diff --git a/test/mix/tasks/clone_test.exs b/test/mix/tasks/clone_test.exs
index fee7873..921dcef 100644
--- a/test/mix/tasks/clone_test.exs
+++ b/test/mix/tasks/clone_test.exs
@@ -10,7 +10,10 @@ defmodule Mix.Tasks.CloneTest do
 
     :ok = Application.ensure_started(:umwelt)
 
-    on_exit(fn -> File.rm_rf!("temp") end)
+    on_exit(fn ->
+      :timer.sleep(99)
+      File.rm_rf!("temp")
+    end)
 
     {:ok, bypass: bypass}
   end
@@ -65,7 +68,6 @@ defmodule Mix.Tasks.CloneTest do
 
       assert capture_log([], fn -> assert :ok == Clone.run([23, "token"]) end) =~ "Done!"
 
-      :timer.sleep(666)
       assert "defmodule Disco" == File.read!("temp/lib/disco.ex")
       assert "defmodule DiscoTest" == File.read!("temp/test/disco_test.ex")
       assert "defmodule Disco.Chaos" == File.read!("temp/lib/disco/chaos.ex")
diff --git a/test/umwelt/client/writer_test.exs b/test/umwelt/client/writer_test.exs
index 362f23c..087fc23 100644
--- a/test/umwelt/client/writer_test.exs
+++ b/test/umwelt/client/writer_test.exs
@@ -17,7 +17,10 @@ defmodule Umwelt.Client.WriterTest do
     Agent.add_modules(%{"Disco.Chaos" => 23})
     Agent.update_status("Disco.Chaos", :fetched)
 
-    on_exit(fn -> File.rm_rf!("temp") end)
+    on_exit(fn ->
+      :timer.sleep(99)
+      File.rm_rf!("temp")
+    end)
 
     {:ok, module: module}
   end