diff --git a/cypress/integration/custom_buttons.js b/cypress/integration/custom_buttons.js
index e2f02668e9..6045d009c2 100644
--- a/cypress/integration/custom_buttons.js
+++ b/cypress/integration/custom_buttons.js
@@ -4,6 +4,7 @@ const test_button_names = [
 	"Porcupine Tree (the GOAT)",
 	"AC / DC",
 	`Electronic Dance "music"`,
+	"l'imperatrice",
 ];
 
 const add_button = (label, group = "TestGroup") => {
diff --git a/frappe/public/js/frappe/ui/page.js b/frappe/public/js/frappe/ui/page.js
index 70e0862ba5..eded1aefc5 100644
--- a/frappe/public/js/frappe/ui/page.js
+++ b/frappe/public/js/frappe/ui/page.js
@@ -510,7 +510,7 @@ frappe.ui.Page = class Page {
 
 		if (!label || !parent) return false;
 
-		const item_selector = `${selector}[data-label='${encodeURIComponent(label)}']`;
+		const item_selector = `${selector}[data-label="${encodeURIComponent(label)}"]`;
 
 		const existing_items = $(parent).find(item_selector);
 		return existing_items?.length > 0 && existing_items;