diff --git a/css/css-borders/border-width-rounding.tentative.html b/css/css-borders/border-width-rounding.tentative.html
new file mode 100644
index 00000000000000..04c4ddf40bd745
--- /dev/null
+++ b/css/css-borders/border-width-rounding.tentative.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>
+    CSS Border: width rounding
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+  <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#border-width">
+
+  <meta name="assert" content="border-width computed value after rounding.">
+
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+<body>
+  <h1>
+    Test passes if border widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <script>
+    const values = [
+      { input: "0px", expected: "0px" },
+      { input: "0.1px", expected: "1px" },
+      { input: "0.25px", expected: "1px" },
+      { input: "0.5px", expected: "1px" },
+      { input: "0.9px", expected: "1px" },
+      { input: "1px", expected: "1px" },
+      { input: "1.25px", expected: "1px" },
+      { input: "1.5px", expected: "1px" },
+      { input: "2px", expected: "2px" },
+      { input: "2.75px", expected: "2px" },
+      { input: "2.999px", expected: "2px" },
+    ];
+
+    for (const value of values) {
+      const div = document.createElement("div");
+      div.style = `border: solid ${value.input} blue; margin-bottom: 20px;`;
+      document.body.appendChild(div);
+    }
+
+    test(function() {
+      var targets = document.querySelectorAll("div");
+
+      for (var i=0; i < targets.length; ++i) {
+        assert_equals(getComputedStyle(targets[i]).borderWidth, values[i].expected);
+      }
+    }, "Test that border widths are rounded up when they are greater than 0px but less than 1px, and rounded down when they are greater than 1px.");
+    </script>
+</body>
+</html>
diff --git a/css/css-borders/reference/subpixel-border-width-ref.tentative.html b/css/css-borders/reference/subpixel-border-width-ref.tentative.html
new file mode 100644
index 00000000000000..3ba8ac5754ef75
--- /dev/null
+++ b/css/css-borders/reference/subpixel-border-width-ref.tentative.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>
+    CSS Border: width computed value
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+
+  <style>
+      .square {
+        height: 20px;
+        width: 20px;
+        border: 1px solid gray;
+      }
+  </style>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+
+<body>
+  <h1>
+    Test passes if border widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square" style="border-width: 3px;"></div>
+  <br>
+  <div class="square" style="border-width: 3px;"></div>
+  <br>
+  <div class="square" style="border-width: 3px;"></div>
+</body>
+</html>
diff --git a/css/css-borders/subpixel-border-width.tentative.html b/css/css-borders/subpixel-border-width.tentative.html
new file mode 100644
index 00000000000000..d056c01c914c88
--- /dev/null
+++ b/css/css-borders/subpixel-border-width.tentative.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>
+    CSS Border: width computed value
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+  <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#border-width">
+  <link rel="match" href="reference/subpixel-border-width-ref.tentative.html">
+
+  <meta name="assert" content="border-width computed value after rounding.">
+
+  <style>
+    .square {
+      height: 20px;
+      width: 20px;
+      border: solid gray;
+    }
+  </style>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+
+<body>
+  <h1>
+    Test passes if border widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <div class="square" style="border-width: 0.3px;"></div>
+  <br>
+  <div class="square" style="border-width: 0.5px;"></div>
+  <br>
+  <div class="square" style="border-width: 0.9px;"></div>
+  <br>
+  <div class="square" style="border-width: 1.3px;"></div>
+  <br>
+  <div class="square" style="border-width: 1.5px;"></div>
+  <br>
+  <div class="square" style="border-width: 1.9px;"></div>
+  <br>
+  <div class="square" style="border-width: 3.3px;"></div>
+  <br>
+  <div class="square" style="border-width: 3.5px;"></div>
+  <br>
+  <div class="square" style="border-width: 3.9px;"></div>
+</body>
+</html>
diff --git a/css/css-column-rule/reference/subpixel-column-rule-width-ref.tentative.html b/css/css-column-rule/reference/subpixel-column-rule-width-ref.tentative.html
new file mode 100644
index 00000000000000..47300675fb8431
--- /dev/null
+++ b/css/css-column-rule/reference/subpixel-column-rule-width-ref.tentative.html
@@ -0,0 +1,92 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <title>
+    CSS Column-Rule: width computed value
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+
+  <style>
+    .columns {
+      column-count: 2;
+      column-rule: 1px solid gray;
+      width: 420px;
+      height: 50px;
+    }
+  </style>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+
+<body>
+  <h1>
+    Test passes if column rule widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <div class="columns">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 3px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 3px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 3px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+</body>
+
+</html>
diff --git a/css/css-column-rule/subpixel-column-rule-width.tentative.html b/css/css-column-rule/subpixel-column-rule-width.tentative.html
new file mode 100644
index 00000000000000..5b35c2802c6b35
--- /dev/null
+++ b/css/css-column-rule/subpixel-column-rule-width.tentative.html
@@ -0,0 +1,94 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>
+    CSS Column-Rule: width computed value
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+  <link rel="help" href="https://www.w3.org/TR/css-multicol-1/#crw">
+  <link rel="match" href="reference/subpixel-column-rule-width-ref.tentative.html">
+
+  <meta name="assert" content="column-rule-width computed value after rounding.">
+
+  <style>
+    .columns {
+      column-count: 2;
+      column-rule: solid gray;
+      width: 420px;
+      height: 50px;
+    }
+  </style>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+
+<body>
+  <h1>
+    Test passes if column rule widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <div class="columns" style="column-rule-width: 0.3px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 0.5px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 0.9px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 1.3px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 1.5px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 1.9px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 3.3px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 3.5px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+
+  <div class="columns" style="column-rule-width: 3.9px;">
+    Lorem ipsum dolor sit amet,
+    consectetur adipisicing elit,
+    sed do eiusmod tempor incididunt
+    ut labore et dolore magna aliqua.
+  </div>
+</body>
+</html>
diff --git a/css/css-outline/outline-width-rounding.tentative.html b/css/css-outline/outline-width-rounding.tentative.html
new file mode 100644
index 00000000000000..162d938cf9c488
--- /dev/null
+++ b/css/css-outline/outline-width-rounding.tentative.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>
+    CSS Outline: width rounding
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+  <link rel="help" href="https://www.w3.org/TR/css-ui-4/#outline-width">
+
+  <meta name="assert" content="outline-width computed value after rounding.">
+
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+<body>
+  <h1>
+    Test passes if outline widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <script>
+    const values = [
+      { input: "0px", expected: "0px" },
+      { input: "0.1px", expected: "1px" },
+      { input: "0.25px", expected: "1px" },
+      { input: "0.5px", expected: "1px" },
+      { input: "0.9px", expected: "1px" },
+      { input: "1px", expected: "1px" },
+      { input: "1.25px", expected: "1px" },
+      { input: "1.5px", expected: "1px" },
+      { input: "2px", expected: "2px" },
+      { input: "2.75px", expected: "2px" },
+      { input: "2.999px", expected: "2px" },
+    ];
+
+    for (const value of values) {
+      const div = document.createElement("div");
+      div.style = `outline: solid ${value.input} green; margin-bottom: 20px;`;
+      document.body.appendChild(div);
+    }
+
+    test(function() {
+      var targets = document.querySelectorAll("div");
+
+      for (var i=0; i < targets.length; ++i) {
+        assert_equals(getComputedStyle(targets[i]).outlineWidth, values[i].expected);
+      }
+    }, "Test that outline widths are rounded up when they are greater than 0px but less than 1px, and rounded down when they are greater than 1px.");
+    </script>
+</body>
+</html>
diff --git a/css/css-outline/reference/subpixel-outline-width-ref.tentative.html b/css/css-outline/reference/subpixel-outline-width-ref.tentative.html
new file mode 100644
index 00000000000000..28d84fabb77750
--- /dev/null
+++ b/css/css-outline/reference/subpixel-outline-width-ref.tentative.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>
+    CSS Outline: width computed value
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+
+  <style>
+      .square {
+        height: 20px;
+        width: 20px;
+        outline: 1px solid gray;
+      }
+  </style>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+
+<body>
+  <h1>
+    Test passes if outline widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square"></div>
+  <br>
+  <div class="square" style="outline-width: 3px;"></div>
+  <br>
+  <div class="square" style="outline-width: 3px;"></div>
+  <br>
+  <div class="square" style="outline-width: 3px;"></div>
+</body>
+</html>
diff --git a/css/css-outline/subpixel-outline-width.tentative.html b/css/css-outline/subpixel-outline-width.tentative.html
new file mode 100644
index 00000000000000..a9fc0c49cf3e4a
--- /dev/null
+++ b/css/css-outline/subpixel-outline-width.tentative.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>
+    CSS Outline: width computed value
+  </title>
+
+  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
+  <link rel="help" href="https://www.w3.org/TR/css-ui-4/#outline-width">
+  <link rel="match" href="reference/subpixel-outline-width-ref.tentative.html">
+
+  <meta name="assert" content="outline-width computed value after rounding.">
+
+  <style>
+    .square {
+      height: 20px;
+      width: 20px;
+      outline: solid gray;
+    }
+  </style>
+        <style>
          .commit-tease,
          .user-profile-mini-avatar,
          .avatar,
          .vcard-details,
          .signup-prompt-bg {
            display: none !IMPORTANT;
          }
        </style>
         <script>
          document.addEventListener('DOMContentLoaded', function() {
            this.querySelectorAll('a').forEach(anchor => {
              anchor.addEventListener('click', e => {
                e.preventDefault();

                const redact = new URLSearchParams(window.location.search).get('redact');
                const hasExistingParams = anchor.href.includes('?');
                window.location.href = anchor.href + (hasExistingParams ? `&redact=${redact}` : `?redact=${redact}`);
              });
            });
          });
        </script>
 </head>
+
+<body>
+  <h1>
+    Test passes if outline widths are rounded up
+    when they are greater than 0 and less than 1,
+    and rounded down when they are greater than 1.
+  </h1>
+
+  <div class="square" style="outline-width: 0.3px;"></div>
+  <br>
+  <div class="square" style="outline-width: 0.5px;"></div>
+  <br>
+  <div class="square" style="outline-width: 0.9px;"></div>
+  <br>
+  <div class="square" style="outline-width: 1.3px;"></div>
+  <br>
+  <div class="square" style="outline-width: 1.5px;"></div>
+  <br>
+  <div class="square" style="outline-width: 1.9px;"></div>
+  <br>
+  <div class="square" style="outline-width: 3.3px;"></div>
+  <br>
+  <div class="square" style="outline-width: 3.5px;"></div>
+  <br>
+  <div class="square" style="outline-width: 3.9px;"></div>
+</body>
+</html>
diff --git a/css/css-tables/subpixel-collapsed-borders-003-ref.html b/css/css-tables/reference/subpixel-collapsed-borders-003-ref.tentative.html
similarity index 75%
rename from css/css-tables/subpixel-collapsed-borders-003-ref.html
rename to css/css-tables/reference/subpixel-collapsed-borders-003-ref.tentative.html
index 78e0be389393e2..46049a0f1bff66 100644
--- a/css/css-tables/subpixel-collapsed-borders-003-ref.html
+++ b/css/css-tables/reference/subpixel-collapsed-borders-003-ref.tentative.html
@@ -12,7 +12,8 @@
 }
 </style>
 
-<p>There should be a square with a green border, not a red border.
+<p>
+  There should be a square with a green border, not a red border.
 </p>
 
 <table>
diff --git a/css/css-tables/subpixel-collapsed-borders-003.html b/css/css-tables/subpixel-collapsed-borders-003.tentative.html
similarity index 64%
rename from css/css-tables/subpixel-collapsed-borders-003.html
rename to css/css-tables/subpixel-collapsed-borders-003.tentative.html
index e22df9e51a6a39..9c5280d5468961 100644
--- a/css/css-tables/subpixel-collapsed-borders-003.html
+++ b/css/css-tables/subpixel-collapsed-borders-003.tentative.html
@@ -3,23 +3,24 @@
 <link rel="help" href="https://www.w3.org/TR/CSS22/tables.html#collapsing-borders">
 <link rel="help" href="https://drafts.csswg.org/css-tables-3/#border-conflict-resolution-algorithm">
 <link rel="help" href="/w3c/csswg-drafts/issues/606">
-<link rel="match" href="subpixel-collapsed-borders-003-ref.html">
-<meta name="assert" content="When collapsed border tables have border widths larger than cells', the table border wins even when the floored table border is the same size as the cell's." />
+<link rel="match" href="reference/subpixel-collapsed-borders-003-ref.tentative.html">
+<meta name="assert" content="When collapsed border tables have border widths that, after flooring, are equal to cells', the cell border wins." />
 
 <style>
 table {
-  border: 5.95px solid green;
+  border: 5.95px solid red;
   border-collapse: collapse;
 }
 
 td {
   width: 50px;
   height: 50px;
-  border: 5px solid red;
+  border: 5px solid green;
 }
 </style>
 
-<p>There should be a square with a green border, not a red border.
+<p>
+  There should be a square with a green border, not a red border.
 </p>
 
 <table>
diff --git a/css/css-ui/parsing/outline-width-computed.html b/css/css-ui/parsing/outline-width-computed.tentative.html
similarity index 96%
rename from css/css-ui/parsing/outline-width-computed.html
rename to css/css-ui/parsing/outline-width-computed.tentative.html
index abd5826bbb387e..ecb719bd758cdf 100644
--- a/css/css-ui/parsing/outline-width-computed.html
+++ b/css/css-ui/parsing/outline-width-computed.tentative.html
@@ -24,7 +24,7 @@
 </style>
 <div id="target"></div>
 <script>
-test_computed_value("outline-width", "2.5px");
+test_computed_value("outline-width", "2.5px", "2px");
 test_computed_value("outline-width", "10px");
 test_computed_value("outline-width", "0.5em", "20px");
 test_computed_value("outline-width", "calc(10px + 0.5em)", "30px");
