diff --git a/wagtail/admin/tests/pages/test_create_page.py b/wagtail/admin/tests/pages/test_create_page.py
index dccb002a33..8dd1dd737e 100644
--- a/wagtail/admin/tests/pages/test_create_page.py
+++ b/wagtail/admin/tests/pages/test_create_page.py
@@ -978,6 +978,10 @@ class TestInlinePanelWithTags(TestCase, WagtailTestUtils):
             'addresses-0-address': "52 Festive Road, London",
             'addresses-0-tags': "shopkeeper, bowler-hat",
             'action-publish': "Publish",
+            'comments-TOTAL_FORMS': 0,
+            'comments-INITIAL_FORMS': 0,
+            'comments-MIN_NUM_FORMS': 0,
+            'comments-MAX_NUM_FORMS': 1000,
         }
         response = self.client.post(
             reverse('wagtailadmin_pages:add', args=('tests', 'personpage', self.root_page.id)), post_data
@@ -1017,6 +1021,10 @@ class TestInlinePanelNonFieldErrors(TestCase, WagtailTestUtils):
             'carousel_items-MAX_NUM_FORMS': 1000,
             'carousel_items-TOTAL_FORMS': 0,
             'action-publish': "Publish",
+            'comments-TOTAL_FORMS': 0,
+            'comments-INITIAL_FORMS': 0,
+            'comments-MIN_NUM_FORMS': 0,
+            'comments-MAX_NUM_FORMS': 1000,
         }
         response = self.client.post(
             reverse('wagtailadmin_pages:add', args=('demosite', 'homepage', self.root_page.id)), post_data
diff --git a/wagtail/admin/tests/pages/test_edit_page.py b/wagtail/admin/tests/pages/test_edit_page.py
index 62dac2a90d..ffae696c50 100644
--- a/wagtail/admin/tests/pages/test_edit_page.py
+++ b/wagtail/admin/tests/pages/test_edit_page.py
@@ -384,6 +384,10 @@ class TestPageEdit(TestCase, WagtailTestUtils):
             'slug': 'hello-again-world',
             'action-publish': "Publish",
             'first_published_at': submittable_timestamp(first_published_at),
+            'comments-TOTAL_FORMS': 0,
+            'comments-INITIAL_FORMS': 0,
+            'comments-MIN_NUM_FORMS': 0,
+            'comments-MAX_NUM_FORMS': 1000,
         }
         self.client.post(reverse('wagtailadmin_pages:edit', args=(self.child_page.id, )), post_data)
 
diff --git a/wagtail/admin/tests/pages/test_preview.py b/wagtail/admin/tests/pages/test_preview.py
index 81e6d12811..dca53d5f18 100644
--- a/wagtail/admin/tests/pages/test_preview.py
+++ b/wagtail/admin/tests/pages/test_preview.py
@@ -97,6 +97,10 @@ class TestPreview(TestCase, WagtailTestUtils):
             'head_counts-MIN_NUM_FORMS': 0,
             'head_counts-MAX_NUM_FORMS': 0,
             'categories': [self.parties_category.id, self.holidays_category.id],
+            'comments-TOTAL_FORMS': 0,
+            'comments-INITIAL_FORMS': 0,
+            'comments-MIN_NUM_FORMS': 0,
+            'comments-MAX_NUM_FORMS': 1000,
         }
 
     def test_preview_on_create_with_m2m_field(self):