diff --git a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-001-ref.html b/testing/web-platform/tests/css/css-pseudo/first-line-line-height-001-ref.html
deleted file mode 100644
index 5f9c597ae5fe..000000000000
--- a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-001-ref.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>CSS-Pseudo reference</title>
-<style>
-div {
-  font: 16px monospace;
-  line-height: 24px;
-  width: 45ch;
-  background: #eee;
-}
- .fl {
-  font-size: 2.5em;
-  line-height: 2em;
-  background: yellow;
-}
-</style>
-<div>
-<span class="fl">Lorem ipsum dolor</span> sit amet, consectetur adipiscing elit,
-sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
-Ut enim ad minim veniam, quis nostrud exercitation ullamco
-laboris nisi ut aliquip ex ea commodo consequat.
-</div>
diff --git a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-001.html b/testing/web-platform/tests/css/css-pseudo/first-line-line-height-001.html
deleted file mode 100644
index f1dd69807ed8..000000000000
--- a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-001.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>CSS-Pseudo testcase: first-line</title>
-<link rel="author" title="Jonathan Kew" href="jkew@mozilla.com">
-<link rel="help" href="https://drafts.csswg.org/css-pseudo/#first-line-styling">
-<link rel="match" href="first-line-line-height-001-ref.html">
-<meta name="assert" content="The ::first-line pseudo-element’s generated box behaves similar to that of an inline-level element">
-<style>
-div {
-  font: 16px monospace;
-  line-height: 24px;
-  width: 45ch;
-  background: #eee;
-}
-div:first-line {
-  font-size: 2.5em;
-  line-height: 2em;
-  background: yellow;
-}
-</style>
-<div>
-Lorem ipsum dolor sit amet, consectetur adipiscing elit,
-sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
-Ut enim ad minim veniam, quis nostrud exercitation ullamco
-laboris nisi ut aliquip ex ea commodo consequat.
-</div>
diff --git a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-002-ref.html b/testing/web-platform/tests/css/css-pseudo/first-line-line-height-002-ref.html
deleted file mode 100644
index 904d5dad1823..000000000000
--- a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-002-ref.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>CSS-Pseudo reference</title>
-<style>
-div {
-  font: 24px/2em monospace;
-  width: 45ch;
-  background: #eee;
-}
-.fl {
-  font-size: 16px;
-  line-height: 1em;
-  background: yellow;
-}
-</style>
-<div>
-<span class="fl">Lorem ipsum dolor sit amet, consectetur adipiscing elit,
-sed do</span> eiusmod tempor incididunt ut labore et dolore magna aliqua.
-Ut enim ad minim veniam, quis nostrud exercitation ullamco
-laboris nisi ut aliquip ex ea commodo consequat.
-</div>
diff --git a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-002.html b/testing/web-platform/tests/css/css-pseudo/first-line-line-height-002.html
deleted file mode 100644
index 240dc43038bf..000000000000
--- a/testing/web-platform/tests/css/css-pseudo/first-line-line-height-002.html
+++ /dev/null
@@ -1,25 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>CSS-Pseudo testcase: first-line</title>
-<link rel="author" title="Jonathan Kew" href="jkew@mozilla.com">
-<link rel="help" href="https://drafts.csswg.org/css-pseudo/#first-line-styling">
-<link rel="match" href="first-line-line-height-001-ref.html">
-<meta name="assert" content="The ::first-line pseudo-element’s generated box behaves similar to that of an inline-level element">
-<style>
-div {
-  font: 24px/2em monospace;
-  width: 45ch;
-  background: #eee;
-}
-div:first-line {
-  font-size: 16px;
-  line-height: 1em;
-  background: yellow;
-}
-</style>
-<div>
-Lorem ipsum dolor sit amet, consectetur adipiscing elit,
-sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
-Ut enim ad minim veniam, quis nostrud exercitation ullamco
-laboris nisi ut aliquip ex ea commodo consequat.
-</div>
