diff --git a/src/authz-module/audit-user/index.test.tsx b/src/authz-module/audit-user/index.test.tsx
index 68af229a..fac9921c 100644
--- a/src/authz-module/audit-user/index.test.tsx
+++ b/src/authz-module/audit-user/index.test.tsx
@@ -496,4 +496,75 @@ describe('AuditUserPage', () => {
       expect(screen.getByText(/this is the user's only role/i)).toBeInTheDocument();
     });
   });
+
+  it('handles undefined data from useUserAssignedRoles with default destructuring', async () => {
+    (useUserAccount as jest.Mock).mockReturnValue({
+      data: mockUser,
+      isLoading: false,
+      isError: false,
+      error: null,
+    });
+
+    (useUserAssignedRoles as jest.Mock).mockReturnValue({
+      data: undefined, // This triggers the default destructuring assignment
+      isLoading: false,
+      isError: false,
+      error: null,
+    });
+
+    renderWithRouter();
+
+    await waitFor(() => {
+      expect(screen.getByText('johndoe', { selector: 'li[aria-current="page"]' })).toBeInTheDocument();
+      expect(screen.getByRole('table')).toBeInTheDocument();
+    });
+  });
+
+  it('navigates to home when user not found and isErrorUser is false', async () => {
+    (useUserAccount as jest.Mock).mockReturnValue({
+      data: null,
+      isLoading: false,
+      isError: false,
+      error: null,
+    });
+
+    (useUserAssignedRoles as jest.Mock).mockReturnValue({
+      data: mockAssignments,
+      isLoading: false,
+      isError: false,
+      error: null,
+    });
+
+    renderWithRouter();
+
+    await waitFor(() => {
+      expect(screen.getByText('Home Page')).toBeInTheDocument();
+    });
+  });
+
+  it('navigates to home when user not found and error is 404', async () => {
+    (useUserAccount as jest.Mock).mockReturnValue({
+      data: null,
+      isLoading: false,
+      isError: true,
+      error: {
+        customAttributes: {
+          httpErrorStatus: 404,
+        },
+      },
+    });
+
+    (useUserAssignedRoles as jest.Mock).mockReturnValue({
+      data: mockAssignments,
+      isLoading: false,
+      isError: false,
+      error: null,
+    });
+
+    renderWithRouter();
+
+    await waitFor(() => {
+      expect(screen.getByText('Home Page')).toBeInTheDocument();
+    });
+  });
 });
diff --git a/src/authz-module/audit-user/index.tsx b/src/authz-module/audit-user/index.tsx
index a084d609..d5f45567 100644
--- a/src/authz-module/audit-user/index.tsx
+++ b/src/authz-module/audit-user/index.tsx
@@ -42,7 +42,9 @@ const AuditUserPage = () => {
     isLoading: isLoadingUser, data: user, isError: isErrorUser, error: errorUser,
   } = useUserAccount(username);
   const { querySettings, handleTableFetch } = useQuerySettings();
-  const { isLoading: isLoadingUserAssignments, data: { results: userAssignments, count } = { results: [], count: 0 } } = useUserAssignedRoles(username ?? '', querySettings);
+  const {
+    isLoading: isLoadingUserAssignments, data: { results: userAssignments, count } = { results: [], count: 0 },
+  } = useUserAssignedRoles(username, querySettings);
   const [roleToDelete, setRoleToDelete] = useState<RoleToDelete | null>(null);
   const [showConfirmDeletionModal, setShowConfirmDeletionModal] = useState(false);
   const {
diff --git a/src/authz-module/role-assignation-wizard/components/SelectUsersAndRoleStep.tsx b/src/authz-module/role-assignation-wizard/components/SelectUsersAndRoleStep.tsx
index 6ee4dd2c..78021c4c 100644
--- a/src/authz-module/role-assignation-wizard/components/SelectUsersAndRoleStep.tsx
+++ b/src/authz-module/role-assignation-wizard/components/SelectUsersAndRoleStep.tsx
@@ -107,7 +107,7 @@ const SelectUsersAndRoleStep = ({
                       </Tooltip>
                     )}
                   >
-                    <div>{radioContent}</div>
+                    <div tabIndex={0} role="button" aria-disabled="true" aria-describedby={`tooltip-disabled-${role.role}`}>{radioContent}</div>
                   </OverlayTrigger>
                 );
               }