diff --git a/wagtail/admin/panels/inline_panel.py b/wagtail/admin/panels/inline_panel.py
index c353ec44ec..b2e9f3eaea 100644
--- a/wagtail/admin/panels/inline_panel.py
+++ b/wagtail/admin/panels/inline_panel.py
@@ -150,7 +150,7 @@ class InlinePanel(Panel):
                     compare.ChildRelationComparison,
                     self.panel.db_field,
                     field_comparisons,
-                    label=self.label,
+                    label=self.heading,
                 )
             ]
 
diff --git a/wagtail/admin/tests/pages/test_edit_page.py b/wagtail/admin/tests/pages/test_edit_page.py
index a9963eed25..ff161fedff 100644
--- a/wagtail/admin/tests/pages/test_edit_page.py
+++ b/wagtail/admin/tests/pages/test_edit_page.py
@@ -167,7 +167,7 @@ class TestPageEdit(WagtailTestUtils, TestCase):
             response,
             '<label class="w-field__label" for="id_speakers-__prefix__-last_name" id="id_speakers-__prefix__-last_name-label">',
         )
-        self.assertContains(response, "Add speakers")
+        self.assertContains(response, "Add speaker")
         self.assertContains(response, "Put the keynote speaker first")
 
         # Test MultiFieldPanel help text
diff --git a/wagtail/admin/tests/test_edit_handlers.py b/wagtail/admin/tests/test_edit_handlers.py
index cc030fdd34..bf1d168193 100644
--- a/wagtail/admin/tests/test_edit_handlers.py
+++ b/wagtail/admin/tests/test_edit_handlers.py
@@ -1569,7 +1569,7 @@ class TestInlinePanelGetComparison(TestCase):
         self.request.user = user
 
     def test_get_comparison(self):
-        # Test whether the InlinePanel passes it's label in get_comparison
+        # Test whether the InlinePanel passes its heading as the label in get_comparison
 
         page = Page.objects.get(id=4).specific
         comparison = (
@@ -1580,7 +1580,7 @@ class TestInlinePanelGetComparison(TestCase):
 
         comparison = [comp(page, page) for comp in comparison]
         field_labels = [comp.field_label() for comp in comparison]
-        self.assertIn("Speakers", field_labels)
+        self.assertIn("Speaker lineup", field_labels)
 
 
 class TestInlinePanelRelatedModelPanelConfigChecks(TestCase):
@@ -2078,7 +2078,7 @@ class TestMultipleChooserPanelGetComparison(TestCase):
         parent_page.add_child(instance=self.page)
 
     def test_get_comparison(self):
-        # Test whether the InlinePanel passes it's label in get_comparison
+        # Test whether the MultipleChooserPanel passes its heading in get_comparison
 
         comparison = (
             self.page.get_edit_handler()
diff --git a/wagtail/test/testapp/models.py b/wagtail/test/testapp/models.py
index 197042a0d8..ab85347d7a 100644
--- a/wagtail/test/testapp/models.py
+++ b/wagtail/test/testapp/models.py
@@ -434,7 +434,7 @@ class EventPage(Page):
         FieldPanel("body"),
         InlinePanel(
             "speakers",
-            label="Speakers",
+            label="Speaker",
             heading="Speaker lineup",
             help_text="Put the keynote speaker first",
         ),
@@ -2359,7 +2359,9 @@ class ModelWithNullableParentalKey(models.Model):
 
 class GalleryPage(Page):
     content_panels = Page.content_panels + [
-        MultipleChooserPanel("gallery_images", chooser_field_name="image")
+        MultipleChooserPanel(
+            "gallery_images", heading="Gallery images", chooser_field_name="image"
+        )
     ]