diff --git a/cypress/integration/assignment_rule.js b/cypress/integration/assignment_rule.js
new file mode 100644
index 0000000000..5431561272
--- /dev/null
+++ b/cypress/integration/assignment_rule.js
@@ -0,0 +1,16 @@
+context("Assignment Rule", () => {
+	before(() => {
+		cy.login();
+	});
+
+	it("Custom grid buttons work", () => {
+		cy.new_form("Assignment Rule");
+		cy.findByRole("button", { name: "All Days" }).should("be.visible").click();
+		cy.wait(2000);
+		cy.window()
+			.its("cur_frm")
+			.then((frm) => {
+				expect(frm.doc.assignment_days.length).to.equal(7);
+			});
+	});
+});