diff --git a/amy/emails/tests/actions/__init__.py b/amy/emails/tests/actions/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/amy/emails/tests/actions/test_persons_merged.py b/amy/emails/tests/actions/test_persons_merged.py
new file mode 100644
index 000000000..fc0f438e5
--- /dev/null
+++ b/amy/emails/tests/actions/test_persons_merged.py
@@ -0,0 +1,130 @@
+from datetime import UTC, datetime, timedelta
+from unittest import mock
+import weakref
+
+from django.test import RequestFactory, TestCase
+
+from emails.models import EmailTemplate, ScheduledEmail
+from emails.signals import persons_merged_signal
+from workshops.models import Person
+
+
+class TestPersonsMergedReceived(TestCase):
+    def test_signal_received(self) -> None:
+        # Arrange
+        person = Person.objects.create()
+        request = RequestFactory().get("/")
+        mock_action = mock.MagicMock()
+
+        # This hack replaces weakref to "emails.actions.persons_merged_receiver" with
+        # a mock. Otherwise mocking doesn't work, as after dereferencing the weakref
+        # the actual function is called.
+        persons_merged_signal.receivers[0] = (
+            persons_merged_signal.receivers[0][0],
+            weakref.ref(mock_action),
+        )
+
+        # Act
+        persons_merged_signal.send(
+            sender=person,
+            request=request,
+            person_a_id=person.id,
+            person_b_id=person.id,
+            selected_person_id=person.id,
+        )
+
+        # Assert
+        mock_action.assert_called_once_with(
+            signal=mock.ANY,
+            sender=person,
+            request=request,
+            person_a_id=person.id,
+            person_b_id=person.id,
+            selected_person_id=person.id,
+        )
+
+    def test_action_triggered(self) -> None:
+        # Arrange
+        person = Person.objects.create()
+        template = EmailTemplate.objects.create(
+            name="Test Email Template",
+            signal="persons_merged",
+            from_header="workshops@carpentries.org",
+            cc_header=["team@carpentries.org"],
+            bcc_header=[],
+            subject="Greetings {{ name }}",
+            body="Hello, {{ name }}! Nice to meet **you**.",
+        )
+        request = RequestFactory().get("/")
+
+        # Act
+        with mock.patch("emails.actions.messages") as mock_messages:
+            persons_merged_signal.send(
+                sender=person,
+                request=request,
+                person_a_id=person.id,
+                person_b_id=person.id,
+                selected_person_id=person.id,
+            )
+
+        # Assert
+        scheduled_email = ScheduledEmail.objects.get(template=template)
+        mock_messages.info.assert_called_once_with(
+            request, f"Action was scheduled: {scheduled_email.get_absolute_url()}."
+        )
+
+    @mock.patch("emails.actions.messages")
+    @mock.patch("emails.actions.timezone")
+    def test_email_scheduled(
+        self, mock_timezone: mock.MagicMock, mock_messages: mock.MagicMock
+    ) -> None:
+        # Arrange
+        NOW = datetime(2023, 6, 1, 10, 0, 0, tzinfo=UTC)
+        mock_timezone.now.return_value = NOW
+        person = Person.objects.create()
+        request = RequestFactory().get("/")
+        signal = "persons_merged"
+        context = {"person": person}
+        scheduled_at = NOW + timedelta(hours=1)
+
+        # Act
+        with mock.patch(
+            "emails.actions.EmailController.schedule_email"
+        ) as mock_schedule_email:
+            persons_merged_signal.send(
+                sender=person,
+                request=request,
+                person_a_id=person.id,
+                person_b_id=person.id,
+                selected_person_id=person.id,
+            )
+
+        # Assert
+        mock_schedule_email.assert_called_once_with(
+            signal=signal,
+            context=context,
+            scheduled_at=scheduled_at,
+            to_header=[person.email],
+        )
+
+    @mock.patch("emails.actions.messages")
+    def test_missing_template(self, mock_messages: mock.MagicMock) -> None:
+        # Arrange
+        person = Person.objects.create()
+        request = RequestFactory().get("/")
+        signal = "persons_merged"
+
+        # Act
+        persons_merged_signal.send(
+            sender=person,
+            request=request,
+            person_a_id=person.id,
+            person_b_id=person.id,
+            selected_person_id=person.id,
+        )
+
+        # Assert
+        mock_messages.warning.assert_called_once_with(
+            request,
+            f"Action was not scheduled due to missing template for signal {signal}.",
+        )