diff --git a/lib/url-state-machine.js b/lib/url-state-machine.js
index e386a8221..ca6b00232 100644
--- a/lib/url-state-machine.js
+++ b/lib/url-state-machine.js
@@ -575,6 +575,13 @@ URLStateMachine.prototype["parse scheme start"] = function parseSchemeStart(c, c
 URLStateMachine.prototype["parse scheme"] = function parseScheme(c, cStr) {
   if (infra.isASCIIAlphanumeric(c) || c === p("+") || c === p("-") || c === p(".")) {
     this.buffer += cStr.toLowerCase();
+  } else if (c === p(":") && this.buffer.length === 1 &&
+             [...this.buffer].every(ch => infra.isASCIIAlpha(ch.codePointAt(0))) &&
+             this.input[this.pointer + 1] === p("\\")) {
+    this.url.scheme = "file";
+    this.url.host = "";
+    this.buffer += ":";
+    this.state = "path";
   } else if (c === p(":")) {
     if (this.stateOverride) {
       if (isSpecial(this.url) && !isSpecialScheme(this.buffer)) {
diff --git a/scripts/get-latest-platform-tests.js b/scripts/get-latest-platform-tests.js
index 2c09518d6..cc7ed2ebd 100644
--- a/scripts/get-latest-platform-tests.js
+++ b/scripts/get-latest-platform-tests.js
@@ -13,7 +13,7 @@ const path = require("path");
 // 1. Go to https://github.com/web-platform-tests/wpt/tree/master/url
 // 2. Press "y" on your keyboard to get a permalink
 // 3. Copy the commit hash
-const commitHash = "40fc257a28faf7c378f59185235685ea8684e8f4";
+const commitHash = "d0bdd2662590a436305355c1bf84754d756689b4";
 
 const urlPrefix = `https://raw.githubusercontent.com/web-platform-tests/wpt/${commitHash}/url/`;
 const targetDir = path.resolve(__dirname, "..", "test", "web-platform-tests");