diff --git a/packages/edit-site/src/utils/constants.js b/packages/edit-site/src/utils/constants.js
index 3b25a51bb1e122..598ba80b3abaf0 100644
--- a/packages/edit-site/src/utils/constants.js
+++ b/packages/edit-site/src/utils/constants.js
@@ -49,7 +49,7 @@ export const PAGE_CONTENT_BLOCK_TYPES = {
 
 export const POST_TYPE_LABELS = {
 	[ TEMPLATE_POST_TYPE ]: __( 'Template' ),
-	[ TEMPLATE_PART_POST_TYPE ]: __( 'Template Part' ),
+	[ TEMPLATE_PART_POST_TYPE ]: __( 'Template part' ),
 	[ PATTERN_TYPES.user ]: __( 'Pattern' ),
 	[ NAVIGATION_POST_TYPE ]: __( 'Navigation' ),
 };
diff --git a/test/e2e/specs/site-editor/writing-flow.spec.js b/test/e2e/specs/site-editor/writing-flow.spec.js
index a2e05f0f0a463a..f9681a5ea2d46f 100644
--- a/test/e2e/specs/site-editor/writing-flow.spec.js
+++ b/test/e2e/specs/site-editor/writing-flow.spec.js
@@ -66,7 +66,7 @@ test.describe( 'Site editor writing flow', () => {
 		// Tab to the inspector, tabbing three times to go past the two resize handles.
 		await pageUtils.pressKeys( 'Tab', { times: 3 } );
 		const inspectorTemplateTab = page.locator(
-			'role=region[name="Editor settings"i] >> role=button[name="Template Part"i]'
+			'role=region[name="Editor settings"i] >> role=button[name="Template part"i]'
 		);
 		await expect( inspectorTemplateTab ).toBeFocused();
 	} );