Context:

• GOOD Playwright Version: [what Playwright version worked nicely?] 1.8
• BAD Playwright Version: [what Playwright version doesn't work any more?] 1.17
• Operating System: [e.g. Windows, Linux or Mac] Ubuntu
• Extra: [any specific details about your environment]

Code Snippet

    function add(...addends) {
      return addends.reduce(
        (accumulator, currentValue) => accumulator + currentValue
      );
    }

    const functionResult = await page.evaluate(`
      ${add.toString()}
      var result = add(1, 2, 3);
      Promise.resolve(result);
    `);

Describe the bug

I get the error:

    page.evaluate: SyntaxError: Unexpected token 'var'

I am trying to migrate from an older jest-playwright-preset setup to @playwright/test, in the process updating playwright. This code worked before.