How long should a Shopify A/B test run?

The ideal duration for an A/B test depends on your store’s traffic and average sales volume, but a general rule is at least 2 to 4 weeks. This allows enough time to capture variation across user behavior patterns, like weekdays vs. weekends or traffic from different channels. You’ll also want to reach statistical significance, meaning the test results are reliable and not just noise. Most A/B testing tools will tell you when a result is statistically valid. Avoid cutting tests short just because one version appears to win early. Without enough data, you risk implementing changes that won’t hold up over time.