> When you resize your browser, you're not testing for responsiveness. You're testing the side effect of how a layout looks when you resize a browser. Yes, but

> When you resize your browser, you're not testing for responsiveness. You're testing the side effect of how a layout looks when you resize a browser. Yes, but testing how the layout looks when you resize should test responsiveness or something is wrong with the design. Who can do more can do less. The design should not break when resizing, resizing is a legitimate action on a desktop UI, and small windows are legitimate too. If it breaks when resizing and depends on reloading, or on being loaded on a specific device, the design is fragile. There's no reason the menu can't become stacked while resizing if needed, and there's no reason the content should overflow the window. (now of course it's important to have all this stuff in mind, but still)