Update packages/react-core/src/components/Page/__tests__/PageHeader.test.tsx

Co-authored-by: Eric Olkowski <70952936+thatblindgeye@users.noreply.github.com>

Author: rebeccaalpert

packages/react-core/src/components/Page/__tests__/PageHeader.test.tsx

@@ -9,7 +9,7 @@ test('Renders children', () => {
 
 test(`Renders with class ${styles.pageHeader} by default`, () => {
   render(<PageHeader>Header content</PageHeader>);
-  expect(screen.getByText('Header content')).toHaveClass(styles.pageHeader);
+  expect(screen.getByText('Header content')).toHaveClass(styles.pageHeader, { exact: true });
 });
 
 test('Renders as a div by default', () => {