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diff --git a/tests/rustdoc-gui/sidebar-mobile-scroll.goml b/tests/rustdoc-gui/sidebar-mobile-scroll.goml
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+++ b/tests/rustdoc-gui/sidebar-mobile-scroll.goml
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+// This test ensures that the mobile sidebar preserves scroll position.
+goto: "file://" + |DOC_PATH| + "/test_docs/struct.Foo.html"
+// Switching to "mobile view" by reducing the width to 600px.
+size: (700, 600)
+assert-css: (".sidebar", {"display": "block", "left": "-1000px"})
+
+// Scroll down.
+scroll-to: "//h2[@id='blanket-implementations']"
+assert-window-property: {"pageYOffset": "627"}
+
+// Open the sidebar menu.
+click: ".sidebar-menu-toggle"
+wait-for-css: (".sidebar", {"left": "0px"})
+
+// We are no longer "scrolled". It's important that the user can't
+// scroll the body at all, but these test scripts are run only in Chrome,
+// and we need to use a more complicated solution to this problem because
+// of Mobile Safari...
+assert-window-property: {"pageYOffset": "0"}
+
+// Close the sidebar menu. Make sure the scroll position gets restored.
+click: ".sidebar-menu-toggle"
+wait-for-css: (".sidebar", {"left": "-1000px"})
+assert-window-property: {"pageYOffset": "627"}
+
+// Now test that scrollability returns when the browser window is just resized.
+click: ".sidebar-menu-toggle"
+wait-for-css: (".sidebar", {"left": "0px"})
+assert-window-property: {"pageYOffset": "0"}
+size: (900, 600)
+assert-window-property: {"pageYOffset": "627"}