diff --git a/src/back-top/__test__/__snapshots__/demo.test.js.snap b/src/back-top/__test__/__snapshots__/demo.test.js.snap
index 739b6a071..020d37396 100644
--- a/src/back-top/__test__/__snapshots__/demo.test.js.snap
+++ b/src/back-top/__test__/__snapshots__/demo.test.js.snap
@@ -3,6 +3,7 @@
 exports[`BackTop BackTop base demo works fine 1`] = `
 <base>
   <t-back-top
+    scrollTop="{{0}}"
     text="顶部"
     theme="round"
     bind:to-top="onToTop"
@@ -13,6 +14,7 @@ exports[`BackTop BackTop base demo works fine 1`] = `
 exports[`BackTop BackTop half-round demo works fine 1`] = `
 <half-round>
   <t-back-top
+    scrollTop="{{0}}"
     text="返回顶部"
     theme="half-round-dark"
     bind:to-top="onToTop"
diff --git a/src/pull-down-refresh/__test__/__snapshots__/demo.test.js.snap b/src/pull-down-refresh/__test__/__snapshots__/demo.test.js.snap
index 19847702b..c5e984d45 100644
--- a/src/pull-down-refresh/__test__/__snapshots__/demo.test.js.snap
+++ b/src/pull-down-refresh/__test__/__snapshots__/demo.test.js.snap
@@ -16,7 +16,7 @@ exports[`PullDownRefresh PullDownRefresh base demo works fine 1`] = `
         "刷新完成",
       ]
     }}"
-    value="{{false}}"
+    value="{{true}}"
     bind:refresh="onRefresh"
     bind:scroll="onScroll"
   >
@@ -204,6 +204,11 @@ exports[`PullDownRefresh PullDownRefresh base demo works fine 1`] = `
           拖拽该区域演示 顶部下拉刷新
         </wx-view>
       </wx-view>
+      <t-back-top
+        scrollTop="{{0}}"
+        text="顶部"
+        visibilityHeight="{{100}}"
+      />
     </wx-view>
   </t-pull-down-refresh>
 </base>