diff --git a/cypress/integration/diagramUpdate.spec.ts b/cypress/integration/diagramUpdate.spec.ts
index 0edcf569..640e4e4e 100644
--- a/cypress/integration/diagramUpdate.spec.ts
+++ b/cypress/integration/diagramUpdate.spec.ts
@@ -30,4 +30,12 @@ describe('Auto sync tests', () => {
 		cy.get('#view').should('not.have.class', 'outOfSync');
 		cy.getLocalStorage('codeStore').snapshot();
 	});
+
+	it('supports commenting code out/in', () => {
+		cy.get('#editor').type('{uparrow} {cmd}/');
+		cy.get('#view').contains('Car').should('not.exist');
+
+		cy.get('#editor').type('{uparrow} {cmd}/');
+		cy.get('#view').contains('Car').should('exist');
+	});
 });