diff --git a/testing/web-platform/tests/css/css-flexbox/intrinsic-width-overflow-auto.tentative.html b/testing/web-platform/tests/css/css-flexbox/intrinsic-width-overflow-auto.tentative.html
new file mode 100644
index 0000000000000..8310e66cc4a2e
--- /dev/null
+++ b/testing/web-platform/tests/css/css-flexbox/intrinsic-width-overflow-auto.tentative.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<link rel="author" title="Google" href="https://www.google.com/" />
+<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#intrinsic-sizes" />
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/1865" />
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+
+<body onload="checkLayout('.flexbox')">
+<div class="flexbox" style="display: flex; width: min-content;" data-expected-width="0">
+  <div style="overflow: auto;">
+    <div style="width: 100px; height: 100px;"></div>
+  </div>
+</div>
+
+<div class="flexbox" style="display: flex; width: min-content;" data-expected-width="10">
+  <div style="overflow: auto; border: 5px solid;">
+    <div style="width: 100px; height: 100px;"></div>
+  </div>
+</div>
