When running checkout tests, it’s crucial to ensure accurate data collection. One key limitation is that express checkout methods—such as Shop Pay, PayPal, and Google Pay—do not go through the standard checkout process. As a result, they are excluded from checkout tests.

Express checkout methods allow users to skip standard checkout steps, meaning any changes made in the test (e.g., layout, delivery options, shipping options) may not be applied to these transactions.

Some express checkout options appear within the standard checkout page but still follow their own separate checkout process. As a result, they do not trigger key events like Payment Info Submitted and Contact Info Submitted, which are crucial for tracking user behavior and conversion rates.

While express checkout methods are convenient for shoppers, they pose challenges in A/B testing due to their ability to bypass standard checkout pages and tracking events. To obtain reliable test results, focusing on users who complete the standard checkout process ensures that changes are accurately measured.

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