diff --git a/hc/api/tests/test_pause.py b/hc/api/tests/test_pause.py
index 4a86518a..eb9e8d0d 100644
--- a/hc/api/tests/test_pause.py
+++ b/hc/api/tests/test_pause.py
@@ -1,3 +1,5 @@
+from datetime import timedelta as td
+
 from django.utils.timezone import now
 from hc.api.models import Check
 from hc.test import BaseTestCase
@@ -57,8 +59,10 @@ class PauseTestCase(BaseTestCase):
 
         self.assertEqual(r.status_code, 404)
 
-    def test_it_clears_last_start(self):
-        check = Check(user=self.alice, status="up", last_start=now())
+    def test_it_clears_last_start_alert_after(self):
+        check = Check(user=self.alice, status="up")
+        check.last_start = now()
+        check.alert_after = check.last_start + td(hours=1)
         check.save()
 
         url = "/api/v1/checks/%s/pause" % check.code
@@ -70,3 +74,4 @@ class PauseTestCase(BaseTestCase):
 
         check.refresh_from_db()
         self.assertEqual(check.last_start, None)
+        self.assertEqual(check.alert_after, None)
diff --git a/hc/api/views.py b/hc/api/views.py
index d9f5c624..6c322497 100644
--- a/hc/api/views.py
+++ b/hc/api/views.py
@@ -189,6 +189,7 @@ def pause(request, code):
 
     check.status = "paused"
     check.last_start = None
+    check.alert_after = None
     check.save()
     return JsonResponse(check.to_dict())
 
diff --git a/hc/front/tests/test_pause.py b/hc/front/tests/test_pause.py
index 4c64a4b6..d06da671 100644
--- a/hc/front/tests/test_pause.py
+++ b/hc/front/tests/test_pause.py
@@ -1,3 +1,5 @@
+from datetime import timedelta as td
+
 from django.utils.timezone import now
 from hc.api.models import Check
 from hc.test import BaseTestCase
@@ -33,8 +35,9 @@ class PauseTestCase(BaseTestCase):
         r = self.client.post(self.url)
         self.assertRedirects(r, "/checks/")
 
-    def test_it_clears_last_start(self):
+    def test_it_clears_last_start_alert_after(self):
         self.check.last_start = now()
+        self.check.alert_after = self.check.last_start + td(hours=1)
         self.check.save()
 
         self.client.login(username="alice@example.org", password="password")
@@ -42,3 +45,4 @@ class PauseTestCase(BaseTestCase):
 
         self.check.refresh_from_db()
         self.assertEqual(self.check.last_start, None)
+        self.assertEqual(self.check.alert_after, None)
diff --git a/hc/front/views.py b/hc/front/views.py
index 4efaf7bd..eb4087ef 100644
--- a/hc/front/views.py
+++ b/hc/front/views.py
@@ -353,6 +353,7 @@ def pause(request, code):
 
     check.status = "paused"
     check.last_start = None
+    check.alert_after = None
     check.save()
 
     if "/details/" in request.META.get("HTTP_REFERER", ""):