diff --git a/LayoutTests/imported/w3c/ChangeLog b/LayoutTests/imported/w3c/ChangeLog
index af171e6..5b6037b 100644
--- a/LayoutTests/imported/w3c/ChangeLog
+++ b/LayoutTests/imported/w3c/ChangeLog
@@ -1,3 +1,14 @@
+2019-10-16  Antti Koivisto  <antti@apple.com>
+
+        [CSS Shadow Parts] Import css/css-shadow-parts/simple-inline.html WPT
+        https://bugs.webkit.org/show_bug.cgi?id=203029
+
+        Reviewed by Adrian Perez de Castro.
+
+        * web-platform-tests/css/css-shadow-parts/simple-inline-expected.txt: Added.
+        * web-platform-tests/css/css-shadow-parts/simple-inline.html: Added.
+        * web-platform-tests/css/css-shadow-parts/w3c-import.log:
+
 2019-10-15  Carlos Alberto Lopez Perez  <clopez@igalia.com>
 
         Import apng testcases from WPT.
diff --git a/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-inline-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-inline-expected.txt
new file mode 100644
index 0000000..f9704a7
--- /dev/null
+++ b/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-inline-expected.txt
@@ -0,0 +1,4 @@
+The following text should be green: 
+
+FAIL Part in selected host is styled assert_equals: expected "rgb(0, 128, 0)" but got "rgb(255, 0, 0)"
+
diff --git a/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-inline.html b/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-inline.html
new file mode 100644
index 0000000..f2c3638d
--- /dev/null
+++ b/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-inline.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>CSS Shadow Parts - Simple Inline</title>
+    <meta href="mailto:fergal@chromium.org" rel="author" title="Fergal Daly">
+    <link href="http://www.google.com/" rel="author" title="Google">
+    <link href="https://drafts.csswg.org/css-shadow-parts/" rel="help">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="support/shadow-helper.js"></script>
+  </head>
+  <body>
+    <style>#c-e::part(partp) { color: green; }</style>
+    <script>installCustomElement("custom-element", "custom-element-template");</script>
+    <template id="custom-element-template">
+      <span id="part" part="partp" style="color: red">This text</span>
+    </template>
+    The following text should be green:
+    <custom-element id="c-e"></custom-element>
+    <script>
+      "use strict";
+      const colorGreen = "rgb(0, 128, 0)";
+      test(function() {
+        const el = getElementByShadowIds(document, ["c-e", "part"]);
+        assert_equals(window.getComputedStyle(el).color, colorGreen);
+      }, "Part in selected host is styled");
+    </script>
+  </body>
+</html>
diff --git a/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/w3c-import.log
index e49e915..71ff221 100644
--- a/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/w3c-import.log
+++ b/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/w3c-import.log
@@ -38,4 +38,5 @@
 /LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/precedence-part-vs-part.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-forward-shorthand.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-forward.html
+/LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple-inline.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-shadow-parts/simple.html