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+<!DOCTYPE html>
+<title>
+  Multi-line column flex fragmentation: break-before:avoid/break-inside:avoid
+  and column balancing.
+</title>
+<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
+<style>
+  #flex {
+    display: flex;
+    flex-direction: column;
+    flex-wrap: wrap;
+    height: 200px;
+  }
+  #flex > div {
+    width: 25px;
+    background: green;
+    flex: none;
+  }
+</style>
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="width:100px; height:100px; background:red;">
+  <div style="width: 100px; columns: 2; column-gap: 0; position: relative;">
+    <div id="flex">
+      <div style="height: 25px;"></div>
+      <div style="height: 25px;"></div>
+      <div style="height: 50px;"></div>
+      <div style="height: 25px; break-before: avoid;"></div>
+      <div style="height: 75px;"></div>
+      <div style="height: 25px;"></div>
+      <div style="height: 25px;"></div>
+      <div style="height: 50px;"></div>
+      <div style="height: 50px; break-before: avoid; break-inside: avoid;"></div>
+      <div style="height: 50px;"></div>
+    </div>
+    <div style="height: 50px; width: 50px; background: green;"></div>
+    <div style="position: absolute; left: 0px; height: 50px; width: 50px; background: white;"></div>
+  </div>
+</div>