diff --git a/test/emails/mailer_test.exs b/test/emails/mailer_test.exs
index e6e34cba8..3da45056b 100644
--- a/test/emails/mailer_test.exs
+++ b/test/emails/mailer_test.exs
@@ -19,6 +19,7 @@ defmodule Pleroma.Emails.MailerTest do
   test "not send email when mailer is disabled" do
     Pleroma.Config.put([Pleroma.Emails.Mailer, :enabled], false)
     Mailer.deliver(@email)
+    :timer.sleep(100)
 
     refute_email_sent(
       from: {"Pleroma", "noreply@example.com"},
@@ -30,6 +31,7 @@ defmodule Pleroma.Emails.MailerTest do
 
   test "send email" do
     Mailer.deliver(@email)
+    :timer.sleep(100)
 
     assert_email_sent(
       from: {"Pleroma", "noreply@example.com"},
@@ -41,6 +43,7 @@ defmodule Pleroma.Emails.MailerTest do
 
   test "perform" do
     Mailer.perform(:deliver_async, @email, [])
+    :timer.sleep(100)
 
     assert_email_sent(
       from: {"Pleroma", "noreply@example.com"},