diff --git a/test/test_helper.exs b/test/test_helper.exs
index bad7081..ae68067 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -1,3 +1,5 @@
 ExUnit.start()
 
 Application.put_env(:tower_email, Tower.Email.Mailer, adapter: Swoosh.Adapters.Test)
+Application.put_env(:tower_email, :otp_app, :tower_email)
+Application.put_env(:tower_email, :environment, :test)
diff --git a/test/tower_email_test.exs b/test/tower_email_test.exs
index ebc453e..91257a3 100644
--- a/test/tower_email_test.exs
+++ b/test/tower_email_test.exs
@@ -22,7 +22,10 @@ defmodule TowerEmailTest do
     # TODO: Support waiting on assert_email_sent with a timeout
     # Swoosh.TestAssertions.assert_email_sent(subject: "ArithmeticError: bad argument in arithmetic expression")
     assert_receive(
-      {:email, %{subject: "ArithmeticError: bad argument in arithmetic expression"}},
+      {
+        :email,
+        %{subject: "[tower_email][test] ArithmeticError: bad argument in arithmetic expression"}
+      },
       1_000
     )
   end