diff --git a/x-pack/platform/plugins/shared/ml/public/application/components/controls/select_severity/select_severity.tsx b/x-pack/platform/plugins/shared/ml/public/application/components/controls/select_severity/select_severity.tsx
index 3f03b46bf5c5e..f8c89e72e7db7 100644
--- a/x-pack/platform/plugins/shared/ml/public/application/components/controls/select_severity/select_severity.tsx
+++ b/x-pack/platform/plugins/shared/ml/public/application/components/controls/select_severity/select_severity.tsx
@@ -237,12 +237,15 @@ export const SelectSeverityUI: FC<
     [onChange, allSeverityOptions]
   );
 
+  const anomalyScoreLabel = i18n.translate('xpack.ml.explorer.severityThresholdLabel', {
+    defaultMessage: 'Anomaly score',
+  });
+
   return (
     <div data-test-subj={'mlAnomalySeverityThresholdControls'} className={classNames}>
       <MultiSuperSelect
-        prepend={i18n.translate('xpack.ml.explorer.severityThresholdLabel', {
-          defaultMessage: 'Anomaly score',
-        })}
+        prepend={anomalyScoreLabel}
+        aria-label={anomalyScoreLabel}
         inputDisplay={inputDisplay}
         options={multiSelectOptions}
         onOptionsChange={handleOptionsChange}
diff --git a/x-pack/platform/plugins/shared/ml/public/application/components/multi_super_select/multi_super_select.tsx b/x-pack/platform/plugins/shared/ml/public/application/components/multi_super_select/multi_super_select.tsx
index e55a4a2bf1318..acf868e19218d 100644
--- a/x-pack/platform/plugins/shared/ml/public/application/components/multi_super_select/multi_super_select.tsx
+++ b/x-pack/platform/plugins/shared/ml/public/application/components/multi_super_select/multi_super_select.tsx
@@ -15,6 +15,7 @@ interface MultiSuperSelect<T> {
   inputDisplay: React.JSX.Element | string;
   options: Array<EuiSelectableOption<T>>;
   onOptionsChange?: (options: Array<EuiSelectableOption<T>>) => void;
+  'aria-label'?: string;
 }
 
 export const MultiSuperSelect = <T = string,>({
@@ -22,6 +23,7 @@ export const MultiSuperSelect = <T = string,>({
   inputDisplay,
   options,
   onOptionsChange,
+  'aria-label': ariaLabel,
 }: MultiSuperSelect<T>) => {
   const [isPopoverOpen, setIsPopoverOpen] = useState(false);
 
@@ -33,7 +35,7 @@ export const MultiSuperSelect = <T = string,>({
 
   const popoverButton = (
     <EuiFormControlLayout isDropdown prepend={prepend} compressed fullWidth>
-      <EuiButtonEmpty onClick={onPopoverButtonClick} css={styles.control}>
+      <EuiButtonEmpty onClick={onPopoverButtonClick} css={styles.control} aria-label={ariaLabel}>
         {inputDisplay}
       </EuiButtonEmpty>
     </EuiFormControlLayout>