diff --git a/x-pack/plugins/observability_solution/observability_ai_assistant_app/public/components/nav_control/index.tsx b/x-pack/plugins/observability_solution/observability_ai_assistant_app/public/components/nav_control/index.tsx
index 074a13815dd0c..b9f44142e946b 100644
--- a/x-pack/plugins/observability_solution/observability_ai_assistant_app/public/components/nav_control/index.tsx
+++ b/x-pack/plugins/observability_solution/observability_ai_assistant_app/public/components/nav_control/index.tsx
@@ -98,6 +98,10 @@ export function NavControl({}: {}) {
   return (
     <>
       <EuiButton
+        aria-label={i18n.translate(
+          'xpack.observabilityAiAssistant.navControl.euiButton.openObservabilityAIAssistantLabel',
+          { defaultMessage: 'Open Observability AI Assistant chat' }
+        )}
         data-test-subj="observabilityAiAssistantAppNavControlButton"
         css={buttonCss}
         onClick={() => {