diff --git a/test/fixtures/wpt/README.md b/test/fixtures/wpt/README.md
index 950f0cd0a966f3..6d60c747c36261 100644
--- a/test/fixtures/wpt/README.md
+++ b/test/fixtures/wpt/README.md
@@ -31,7 +31,7 @@ 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/1406b5c0d0/WebCryptoAPI
+- WebCryptoAPI: https://github.com/web-platform-tests/wpt/tree/188993d46b/WebCryptoAPI
 - webidl/ecmascript-binding/es-exceptions: https://github.com/web-platform-tests/wpt/tree/a370aad338/webidl/ecmascript-binding/es-exceptions
 - webmessaging/broadcastchannel: https://github.com/web-platform-tests/wpt/tree/e97fac4791/webmessaging/broadcastchannel
 
diff --git a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.https.any.js b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.https.any.js
index afa7db845faaee..c1837591ee85d4 100644
--- a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.https.any.js
+++ b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.https.any.js
@@ -1,4 +1,5 @@
 // META: title=WebCryptoAPI: deriveBits() Using ECDH with CFRG Elliptic Curves
+// META: script=cfrg_curves_bits_fixtures.js
 // META: script=cfrg_curves_bits.js
 
 // Define subtests from a `promise_test` to ensure the harness does not
diff --git a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js
index 463f687f1652e4..4e12ca0eb711fa 100644
--- a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js
+++ b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js
@@ -3,44 +3,6 @@ function define_tests() {
   // May want to test prefixed implementations.
   var subtle = self.crypto.subtle;
 
-  var pkcs8 = {
-      "X25519": new Uint8Array([48, 46, 2, 1, 0, 48, 5, 6, 3, 43, 101, 110, 4, 34, 4, 32, 200, 131, 142, 118, 208, 87, 223, 183, 216, 201, 90, 105, 225, 56, 22, 10, 221, 99, 115, 253, 113, 164, 210, 118, 187, 86, 227, 168, 27, 100, 255, 97]),
-      "X448": new Uint8Array([48, 70, 2, 1, 0, 48, 5, 6, 3, 43, 101, 111, 4, 58, 4, 56, 88, 199, 210, 154, 62, 181, 25, 178, 157, 0, 207, 177, 145, 187, 100, 252, 109, 138, 66, 216, 241, 113, 118, 39, 43, 137, 242, 39, 45, 24, 25, 41, 92, 101, 37, 192, 130, 150, 113, 176, 82, 239, 7, 39, 83, 15, 24, 142, 49, 208, 204, 83, 191, 38, 146, 158])
-  };
-
-  var spki = {
-      "X25519": new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 28, 242, 177, 230, 2, 46, 197, 55, 55, 30, 215, 245, 62, 84, 250, 17, 84, 216, 62, 152, 235, 100, 234, 81, 250, 229, 179, 48, 124, 254, 151, 6]),
-      "X448": new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 182, 4, 161, 209, 165, 205, 29, 148, 38, 213, 97, 239, 99, 10, 158, 177, 108, 190, 105, 213, 185, 202, 97, 94, 220, 83, 99, 62, 251, 82, 234, 49, 230, 230, 160, 161, 219, 172, 198, 231, 108, 188, 230, 72, 45, 126, 75, 163, 213, 93, 158, 128, 39, 101, 206, 111])
-  };
-
-  var sizes = {
-      "X25519": 32,
-      "X448": 56
-  };
-
-  var derivations = {
-      "X25519": new Uint8Array([39, 104, 64, 157, 250, 185, 158, 194, 59, 140, 137, 185, 63, 245, 136, 2, 149, 247, 97, 118, 8, 143, 137, 228, 61, 254, 190, 126, 161, 149, 0, 8]),
-      "X448": new Uint8Array([240, 246, 197, 241, 127, 148, 244, 41, 30, 171, 113, 120, 134, 109, 55, 236, 137, 6, 221, 108, 81, 65, 67, 220, 133, 190, 124, 242, 141, 239, 243, 155, 114, 110, 15, 109, 207, 129, 14, 181, 148, 220, 169, 123, 72, 130, 189, 68, 196, 62, 167, 220, 103, 244, 154, 78])
-  };
-
-  var kSmallOrderPoint = {
-      "X25519": [
-          { order: "0",                vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-          { order: "1",                vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-          { order: "8",                vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 224, 235, 122, 124, 59, 65, 184, 174, 22, 86, 227, 250, 241, 159, 196, 106, 218, 9, 141, 235, 156, 50, 177, 253, 134, 98, 5, 22, 95, 73, 184, 0]) },
-          { order: "p-1 (order 2)",    vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 236, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
-          { order: "p (=0, order 4)",  vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 237, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
-          { order: "p+1 (=1, order 1)", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 238, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
-      ],
-      "X448": [
-          { order: "0",                 vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-          { order: "1",                 vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
-          { order: "p-1 (order 2)",     vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
-          { order: "p (=0, order 4)",   vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
-          { order: "p+1 (=1, order 1)", vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
-      ]
-  };
-
   // Verify the derive functions perform checks against the all-zero value results,
   // ensuring small-order points are rejected.
   // https://www.rfc-editor.org/rfc/rfc7748#section-6.1
@@ -50,16 +12,16 @@ function define_tests() {
       kSmallOrderPoint[algorithmName].forEach(function(test) {
           promise_test(async() => {
               let derived;
-              let privateKey = await subtle.importKey("pkcs8", pkcs8[algorithmName],
+              let privateKey;
+              let publicKey;
+              try {
+                  privateKey = await subtle.importKey("pkcs8", pkcs8[algorithmName],
                                                   {name: algorithmName},
                                                   false, ["deriveBits", "deriveKey"]);
-              let publicKey = await subtle.importKey("spki", test.vector,
+                  publicKey = await subtle.importKey("spki", test.vector,
                                                  {name: algorithmName},
                                                  false, [])
-              try {
-                  derived = await subtle.deriveKey({name: algorithmName, public: publicKey}, privateKey,
-                                                   {name: "HMAC", hash: "SHA-256", length: 256}, true,
-                                                   ["sign", "verify"]);
+                  derived = await subtle.deriveBits({name: algorithmName, public: publicKey}, privateKey, 8 * sizes[algorithmName]);
               } catch (err) {
                   assert_false(privateKey === undefined, "Private key should be valid.");
                   assert_false(publicKey === undefined, "Public key should be valid.");
diff --git a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits_fixtures.js b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits_fixtures.js
new file mode 100644
index 00000000000000..ffdeb51eab9700
--- /dev/null
+++ b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits_fixtures.js
@@ -0,0 +1,37 @@
+var pkcs8 = {
+    "X25519": new Uint8Array([48, 46, 2, 1, 0, 48, 5, 6, 3, 43, 101, 110, 4, 34, 4, 32, 200, 131, 142, 118, 208, 87, 223, 183, 216, 201, 90, 105, 225, 56, 22, 10, 221, 99, 115, 253, 113, 164, 210, 118, 187, 86, 227, 168, 27, 100, 255, 97]),
+    "X448": new Uint8Array([48, 70, 2, 1, 0, 48, 5, 6, 3, 43, 101, 111, 4, 58, 4, 56, 88, 199, 210, 154, 62, 181, 25, 178, 157, 0, 207, 177, 145, 187, 100, 252, 109, 138, 66, 216, 241, 113, 118, 39, 43, 137, 242, 39, 45, 24, 25, 41, 92, 101, 37, 192, 130, 150, 113, 176, 82, 239, 7, 39, 83, 15, 24, 142, 49, 208, 204, 83, 191, 38, 146, 158])
+};
+
+var spki = {
+    "X25519": new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 28, 242, 177, 230, 2, 46, 197, 55, 55, 30, 215, 245, 62, 84, 250, 17, 84, 216, 62, 152, 235, 100, 234, 81, 250, 229, 179, 48, 124, 254, 151, 6]),
+    "X448": new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 182, 4, 161, 209, 165, 205, 29, 148, 38, 213, 97, 239, 99, 10, 158, 177, 108, 190, 105, 213, 185, 202, 97, 94, 220, 83, 99, 62, 251, 82, 234, 49, 230, 230, 160, 161, 219, 172, 198, 231, 108, 188, 230, 72, 45, 126, 75, 163, 213, 93, 158, 128, 39, 101, 206, 111])
+};
+
+var sizes = {
+    "X25519": 32,
+    "X448": 56
+};
+
+var derivations = {
+    "X25519": new Uint8Array([39, 104, 64, 157, 250, 185, 158, 194, 59, 140, 137, 185, 63, 245, 136, 2, 149, 247, 97, 118, 8, 143, 137, 228, 61, 254, 190, 126, 161, 149, 0, 8]),
+    "X448": new Uint8Array([240, 246, 197, 241, 127, 148, 244, 41, 30, 171, 113, 120, 134, 109, 55, 236, 137, 6, 221, 108, 81, 65, 67, 220, 133, 190, 124, 242, 141, 239, 243, 155, 114, 110, 15, 109, 207, 129, 14, 181, 148, 220, 169, 123, 72, 130, 189, 68, 196, 62, 167, 220, 103, 244, 154, 78])
+};
+
+var kSmallOrderPoint = {
+    "X25519": [
+        { order: "0",                vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
+        { order: "1",                vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
+        { order: "8",                vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 224, 235, 122, 124, 59, 65, 184, 174, 22, 86, 227, 250, 241, 159, 196, 106, 218, 9, 141, 235, 156, 50, 177, 253, 134, 98, 5, 22, 95, 73, 184, 0]) },
+        { order: "p-1 (order 2)",    vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 236, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
+        { order: "p (=0, order 4)",  vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 237, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
+        { order: "p+1 (=1, order 1)", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 238, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
+    ],
+    "X448": [
+        { order: "0",                 vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
+        { order: "1",                 vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
+        { order: "p-1 (order 2)",     vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
+        { order: "p (=0, order 4)",   vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
+        { order: "p+1 (=1, order 1)", vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
+    ]
+};
diff --git a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.https.any.js b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.https.any.js
index 71fe87d9a874b7..96658a56e81da9 100644
--- a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.https.any.js
+++ b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.https.any.js
@@ -1,4 +1,5 @@
 // META: title=WebCryptoAPI: deriveKey() Using ECDH with CFRG Elliptic Curves
+// META: script=cfrg_curves_bits_fixtures.js
 // META: script=cfrg_curves_keys.js
 
 // Define subtests from a `promise_test` to ensure the harness does not
diff --git a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.js b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.js
index 3c53697ce3c49b..81244ba05a8766 100644
--- a/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.js
+++ b/test/fixtures/wpt/WebCryptoAPI/derive_bits_keys/cfrg_curves_keys.js
@@ -3,25 +3,36 @@ function define_tests() {
   // May want to test prefixed implementations.
   var subtle = self.crypto.subtle;
 
-  var pkcs8 = {
-    "X25519": new Uint8Array([48, 46, 2, 1, 0, 48, 5, 6, 3, 43, 101, 110, 4, 34, 4, 32, 200, 131, 142, 118, 208, 87, 223, 183, 216, 201, 90, 105, 225, 56, 22, 10, 221, 99, 115, 253, 113, 164, 210, 118, 187, 86, 227, 168, 27, 100, 255, 97]),
-    "X448": new Uint8Array([48, 70, 2, 1, 0, 48, 5, 6, 3, 43, 101, 111, 4, 58, 4, 56, 88, 199, 210, 154, 62, 181, 25, 178, 157, 0, 207, 177, 145, 187, 100, 252, 109, 138, 66, 216, 241, 113, 118, 39, 43, 137, 242, 39, 45, 24, 25, 41, 92, 101, 37, 192, 130, 150, 113, 176, 82, 239, 7, 39, 83, 15, 24, 142, 49, 208, 204, 83, 191, 38, 146, 158])
-  };
-
-  var spki = {
-      "X25519": new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 28, 242, 177, 230, 2, 46, 197, 55, 55, 30, 215, 245, 62, 84, 250, 17, 84, 216, 62, 152, 235, 100, 234, 81, 250, 229, 179, 48, 124, 254, 151, 6]),
-      "X448": new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 182, 4, 161, 209, 165, 205, 29, 148, 38, 213, 97, 239, 99, 10, 158, 177, 108, 190, 105, 213, 185, 202, 97, 94, 220, 83, 99, 62, 251, 82, 234, 49, 230, 230, 160, 161, 219, 172, 198, 231, 108, 188, 230, 72, 45, 126, 75, 163, 213, 93, 158, 128, 39, 101, 206, 111])
-  };
-
-  var sizes = {
-      "X25519": 32,
-      "X448": 56
-  };
-
-  var derivations = {
-      "X25519": new Uint8Array([39, 104, 64, 157, 250, 185, 158, 194, 59, 140, 137, 185, 63, 245, 136, 2, 149, 247, 97, 118, 8, 143, 137, 228, 61, 254, 190, 126, 161, 149, 0, 8]),
-      "X448": new Uint8Array([240, 246, 197, 241, 127, 148, 244, 41, 30, 171, 113, 120, 134, 109, 55, 236, 137, 6, 221, 108, 81, 65, 67, 220, 133, 190, 124, 242, 141, 239, 243, 155, 114, 110, 15, 109, 207, 129, 14, 181, 148, 220, 169, 123, 72, 130, 189, 68, 196, 62, 167, 220, 103, 244, 154, 78])
-  };
+  // Verify the derive functions perform checks against the all-zero value results,
+  // ensuring small-order points are rejected.
+  // https://www.rfc-editor.org/rfc/rfc7748#section-6.1
+  // TODO: The spec states that the check must be done on use, but there is discussion about doing it on import.
+  // https://github.com/WICG/webcrypto-secure-curves/pull/13
+  Object.keys(kSmallOrderPoint).forEach(function(algorithmName) {
+      kSmallOrderPoint[algorithmName].forEach(function(test) {
+          promise_test(async() => {
+              let derived;
+              let privateKey;
+              let publicKey;
+              try {
+                  privateKey = await subtle.importKey("pkcs8", pkcs8[algorithmName],
+                                                  {name: algorithmName},
+                                                  false, ["deriveBits", "deriveKey"]);
+                  publicKey = await subtle.importKey("spki", test.vector,
+                                                 {name: algorithmName},
+                                                 false, [])
+                  derived = await subtle.deriveKey({name: algorithmName, public: publicKey}, privateKey,
+                                                   {name: "HMAC", hash: "SHA-256", length: 256}, true,
+                                                   ["sign", "verify"]);
+              } catch (err) {
+                  assert_false(privateKey === undefined, "Private key should be valid.");
+                  assert_false(publicKey === undefined, "Public key should be valid.");
+                  assert_equals(err.name, "OperationError", "Should throw correct error, not " + err.name + ": " + err.message + ".");
+              }
+              assert_equals(derived, undefined, "Operation succeeded, but should not have.");
+          }, algorithmName + " deriveBits checks for all-zero value result with a key of order " + test.order);
+      });
+  });
 
   // Ensure the keys generated by each algorithm are valid for key derivation.
   Object.keys(sizes).forEach(function(algorithmName) {
diff --git a/test/fixtures/wpt/versions.json b/test/fixtures/wpt/versions.json
index 583e1f75bf585f..c76ebb17760bfc 100644
--- a/test/fixtures/wpt/versions.json
+++ b/test/fixtures/wpt/versions.json
@@ -84,7 +84,7 @@
     "path": "wasm/webapi"
   },
   "WebCryptoAPI": {
-    "commit": "1406b5c0d07b5e8dd08e328c451e42c23f3b96c8",
+    "commit": "188993d46b95c9c0414ba2cef8751f5e19d3d498",
     "path": "WebCryptoAPI"
   },
   "webidl/ecmascript-binding/es-exceptions": {