diff --git a/packages/block-editor/src/hooks/use-bindings-attributes.js b/packages/block-editor/src/hooks/use-bindings-attributes.js
index e1ebf5fda6b8ee..ac045004cc654b 100644
--- a/packages/block-editor/src/hooks/use-bindings-attributes.js
+++ b/packages/block-editor/src/hooks/use-bindings-attributes.js
@@ -162,9 +162,8 @@ export const withBlockBindingSupport = createHigherOrderComponent(
 					let values = {};
 					if ( ! source.getValues ) {
 						Object.keys( bindings ).forEach( ( attr ) => {
-							// Default to the `key` or the source label when `getValues` doesn't exist
-							values[ attr ] =
-								bindings[ attr ].args?.key || source.label;
+							// Default to the the source label when `getValues` doesn't exist.
+							values[ attr ] = source.label;
 						} );
 					} else {
 						values = source.getValues( {
diff --git a/test/e2e/specs/editor/various/block-bindings.spec.js b/test/e2e/specs/editor/various/block-bindings.spec.js
index c556c469698ebd..90a5d2b1da9f10 100644
--- a/test/e2e/specs/editor/various/block-bindings.spec.js
+++ b/test/e2e/specs/editor/various/block-bindings.spec.js
@@ -66,7 +66,7 @@ test.describe( 'Block bindings', () => {
 				);
 			} );
 
-			test( 'should show the key of the custom field in server sources with key', async ( {
+			test( 'should always show the source label in server-only sources', async ( {
 				editor,
 			} ) => {
 				await editor.insertBlock( {
@@ -86,30 +86,6 @@ test.describe( 'Block bindings', () => {
 				const paragraphBlock = editor.canvas.getByRole( 'document', {
 					name: 'Block: Paragraph',
 				} );
-				await expect( paragraphBlock ).toHaveText(
-					'text_custom_field'
-				);
-			} );
-
-			test( 'should show the source label in server sources without key', async ( {
-				editor,
-			} ) => {
-				await editor.insertBlock( {
-					name: 'core/paragraph',
-					attributes: {
-						content: 'paragraph default content',
-						metadata: {
-							bindings: {
-								content: {
-									source: 'core/server-source',
-								},
-							},
-						},
-					},
-				} );
-				const paragraphBlock = editor.canvas.getByRole( 'document', {
-					name: 'Block: Paragraph',
-				} );
 				await expect( paragraphBlock ).toHaveText( 'Server Source' );
 			} );