diff --git a/test/fixtures/wpt/README.md b/test/fixtures/wpt/README.md
index 3917bbaf73f741..06b4913a00002c 100644
--- a/test/fixtures/wpt/README.md
+++ b/test/fixtures/wpt/README.md
@@ -32,7 +32,7 @@ Last update:
 - user-timing: https://github.com/web-platform-tests/wpt/tree/df24fb604e/user-timing
 - wasm/jsapi: https://github.com/web-platform-tests/wpt/tree/d8dbe6990b/wasm/jsapi
 - wasm/webapi: https://github.com/web-platform-tests/wpt/tree/fd1b23eeaa/wasm/webapi
-- WebCryptoAPI: https://github.com/web-platform-tests/wpt/tree/84456654f4/WebCryptoAPI
+- WebCryptoAPI: https://github.com/web-platform-tests/wpt/tree/450f829d25/WebCryptoAPI
 - webidl/ecmascript-binding/es-exceptions: https://github.com/web-platform-tests/wpt/tree/a370aad338/webidl/ecmascript-binding/es-exceptions
 
 [Web Platform Tests]: https://github.com/web-platform-tests/wpt
diff --git a/test/fixtures/wpt/WebCryptoAPI/encrypt_decrypt/aes_gcm_vectors.js b/test/fixtures/wpt/WebCryptoAPI/encrypt_decrypt/aes_gcm_vectors.js
index 72566ded62f1f9..bc406f8f0ef78e 100644
--- a/test/fixtures/wpt/WebCryptoAPI/encrypt_decrypt/aes_gcm_vectors.js
+++ b/test/fixtures/wpt/WebCryptoAPI/encrypt_decrypt/aes_gcm_vectors.js
@@ -246,7 +246,7 @@ function getTestVectors() {
     var failing = [];
     keyLengths.forEach(function(keyLength) {
         // First, make some tests for bad tag lengths
-        [24, 48, 72, 95, 129, 256].forEach(function(badTagLength) {
+        [24, 48, 72, 95, 129].forEach(function(badTagLength) {
             failing.push({
                 name: "AES-GCM " + keyLength.toString() + "-bit key, illegal tag length " + badTagLength.toString() + "-bits",
                 keyBuffer: keyBytes[keyLength],
diff --git a/test/fixtures/wpt/WebCryptoAPI/util/helpers.js b/test/fixtures/wpt/WebCryptoAPI/util/helpers.js
index 8874f731f8bbcf..ee9d09d1251237 100644
--- a/test/fixtures/wpt/WebCryptoAPI/util/helpers.js
+++ b/test/fixtures/wpt/WebCryptoAPI/util/helpers.js
@@ -160,6 +160,7 @@ function assert_goodCryptoKey(key, algorithm, extractable, usages, kind) {
         assert_in_array(usage, correctUsages, "Has " + usage + " usage");
     });
     assert_equals(key.usages.length, usageCount, "usages property is correct");
+    assert_equals(key[Symbol.toStringTag], 'CryptoKey', "has the expected Symbol.toStringTag");
 }
 
 
diff --git a/test/fixtures/wpt/versions.json b/test/fixtures/wpt/versions.json
index 873f0cc665c710..ec413e0d133e89 100644
--- a/test/fixtures/wpt/versions.json
+++ b/test/fixtures/wpt/versions.json
@@ -88,7 +88,7 @@
     "path": "wasm/webapi"
   },
   "WebCryptoAPI": {
-    "commit": "84456654f439f236f3470a36601ecbc4365f50c5",
+    "commit": "450f829d2567ed9c44bd9b10f7e8f34a2ad15315",
     "path": "WebCryptoAPI"
   },
   "webidl/ecmascript-binding/es-exceptions": {
diff --git a/test/wpt/status/WebCryptoAPI.json b/test/wpt/status/WebCryptoAPI.json
index 27d6825a6fa7d5..9f9ba93240be25 100644
--- a/test/wpt/status/WebCryptoAPI.json
+++ b/test/wpt/status/WebCryptoAPI.json
@@ -1,17 +1,4 @@
 {
-  "encrypt_decrypt/aes_gcm.https.any.js": {
-    "fail": {
-      "note": "We're throwing correct error for the WebIDL definition, WPT needs update: https://github.com/web-platform-tests/wpt/pull/37734",
-      "expected": [
-        "AES-GCM 128-bit key, illegal tag length 256-bits",
-        "AES-GCM 192-bit key, illegal tag length 256-bits",
-        "AES-GCM 256-bit key, illegal tag length 256-bits",
-        "AES-GCM 128-bit key, illegal tag length 256-bits decryption",
-        "AES-GCM 192-bit key, illegal tag length 256-bits decryption",
-        "AES-GCM 256-bit key, illegal tag length 256-bits decryption"
-      ]
-    }
-  },
   "algorithm-discards-context.https.window.js": {
     "skip": "Not relevant in Node.js context"
   },