diff --git a/src/__tests__/snapshot-tests/__snapshots__/test-utils-selectors.test.tsx.snap b/src/__tests__/snapshot-tests/__snapshots__/test-utils-selectors.test.tsx.snap
index 1f5a3b96d7..5daaf28ad8 100644
--- a/src/__tests__/snapshot-tests/__snapshots__/test-utils-selectors.test.tsx.snap
+++ b/src/__tests__/snapshot-tests/__snapshots__/test-utils-selectors.test.tsx.snap
@@ -515,6 +515,8 @@ exports[`test-utils selectors 1`] = `
     "awsui_token-editor-token-remove-actions_1heb1",
   ],
   "radio-group": [
+    "awsui_radio_1mabk",
+    "awsui_root_1mabk",
     "awsui_root_1np5w",
   ],
   "s3-resource-selector": [
diff --git a/src/radio-group/internal.tsx b/src/radio-group/internal.tsx
index d0011fef7a..49af598327 100644
--- a/src/radio-group/internal.tsx
+++ b/src/radio-group/internal.tsx
@@ -58,6 +58,7 @@ const InternalRadioGroup = React.forwardRef(
         className={clsx(
           baseProps.className,
           testUtilStyles.root,
+          styles.root,
           styles['radio-group'],
           direction === 'horizontal' && styles['horizontal-group']
         )}
diff --git a/src/radio-group/styles.scss b/src/radio-group/styles.scss
index cdf6994923..91e76aebb4 100644
--- a/src/radio-group/styles.scss
+++ b/src/radio-group/styles.scss
@@ -6,6 +6,10 @@
 @use '../internal/styles' as styles;
 @use '../internal/styles/tokens' as awsui;
 
+.root {
+  /* used for backwards-compatibility with older versions of test-utils */
+}
+
 .radio-group {
   @include styles.styles-reset;
 
diff --git a/src/test-utils/dom/radio-group/index.ts b/src/test-utils/dom/radio-group/index.ts
index c36c8beb99..4b9305ea71 100644
--- a/src/test-utils/dom/radio-group/index.ts
+++ b/src/test-utils/dom/radio-group/index.ts
@@ -6,13 +6,17 @@ import { escapeSelector } from '@cloudscape-design/test-utils-core/utils';
 import RadioButtonWrapper from '../radio-button';
 
 import radioButtonStyles from '../../../internal/components/radio-button/test-classes/styles.selectors.js';
+import legacyStyles from '../../../radio-group/styles.selectors.js';
 import styles from '../../../radio-group/test-classes/styles.selectors.js';
 
 export default class RadioGroupWrapper extends ComponentWrapper {
   static rootSelector: string = styles.root;
+  static legacyRootSelector: string = legacyStyles.root;
 
   findButtons(): Array<RadioButtonWrapper> {
-    return this.findAllByClassName(radioButtonStyles.root).map(r => new RadioButtonWrapper(r.getElement()));
+    return this.findAll(`:is(.${radioButtonStyles.root}, .${legacyStyles.radio})`).map(
+      r => new RadioButtonWrapper(r.getElement())
+    );
   }
 
   findInputByValue(value: string): ElementWrapper<HTMLInputElement> | null {