1 files changed, 4 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webauthn/createcredential-passing.https.html b/testing/web-platform/tests/webauthn/createcredential-passing.https.html
index f64a4ff039..4124c2247e 100644
--- a/testing/web-platform/tests/webauthn/createcredential-passing.https.html
+++ b/testing/web-platform/tests/webauthn/createcredential-passing.https.html
@@ -58,6 +58,10 @@ standardSetup(function() {
     new CreateCredentialsTest("options.publicKey.pubKeyCredParams", [pkParamEC512, pkParamEC256])
         .runTest("SelectEC256 pubKeyCredParams from a list");
 
+    // pubKeyCredParams with unknown value
+    new CreateCredentialsTest("options.publicKey.pubKeyCredParams", [{ "type": "unknown", alg: -7, }, { "type": "public-key", alg: -7, }])
+        .runTest("pubKeyCredParams with unknown value");
+
     // timeout
     new CreateCredentialsTest({path: "options.publicKey.timeout", value: undefined}).runTest("passing credentials.create() with no timeout");