diff --git a/test/e2e/specs/editor/blocks/spacer.spec.js b/test/e2e/specs/editor/blocks/spacer.spec.js
index ba5de4ea758f9..620d1a3c967b8 100644
--- a/test/e2e/specs/editor/blocks/spacer.spec.js
+++ b/test/e2e/specs/editor/blocks/spacer.spec.js
@@ -53,6 +53,8 @@ test.describe( 'Spacer', () => {
 		editor,
 		page,
 	} ) => {
+		await page.waitForFunction( () => window?.wp?.data );
+
 		// Mock the theme.json data to simulate a theme without spacing units
 		await page.evaluate( () => {
 			const settings = window.wp.data