diff --git a/addons/api/addon/models/auth-method.js b/addons/api/addon/models/auth-method.js
index 699f5137e..dc03abc0d 100644
--- a/addons/api/addon/models/auth-method.js
+++ b/addons/api/addon/models/auth-method.js
@@ -7,7 +7,7 @@ import { equal } from '@ember/object/computed';
  */
 export const options = {
   oidc: {
-    signing_algorithm: [
+    signing_algorithms: [
       'RS256',
       'RS384',
       'RS512',
diff --git a/addons/api/addon/models/fragment-auth-method-attributes.js b/addons/api/addon/models/fragment-auth-method-attributes.js
index b023401f2..5fb952ccd 100644
--- a/addons/api/addon/models/fragment-auth-method-attributes.js
+++ b/addons/api/addon/models/fragment-auth-method-attributes.js
@@ -20,4 +20,21 @@ export default class FragmentAuthMethodAttributesModel extends Fragment {
     emptyArrayIfMissing: true,
   })
   account_claim_maps;
+
+  @fragmentArray('fragment-string', {
+    emptyArrayIfMissing: true,
+  })
+  claims_scopes;
+
+  @fragmentArray('fragment-string', {
+    emptyArrayIfMissing: true,
+  })
+  signing_algorithms;
+
+  @fragmentArray('fragment-string', {
+    emptyArrayIfMissing: true,
+  })
+  allowed_audiences;
+
+  @fragmentArray('fragment-string', { emptyArrayIfMissing: true }) idp_ca_certs;
 }
diff --git a/addons/api/mirage/generated/factories/auth-method.js b/addons/api/mirage/generated/factories/auth-method.js
index 8fd338a53..c309202f2 100644
--- a/addons/api/mirage/generated/factories/auth-method.js
+++ b/addons/api/mirage/generated/factories/auth-method.js
@@ -24,6 +24,11 @@ export default Factory.extend({
           client_secret_hmac: 'GY7blb4ynM5TEPNi_qnphJ9aDWhW8FpmN3D-eP_L7Zk',
           issuer: 'http://127.0.0.1:57070',
           state: 'active-public',
+          account_claim_maps: ['oid=sub', 'full_name=name'],
+          claims_scopes: ['profile', 'email'],
+          signing_algorithms: ['RS256', 'RS384'],
+          allowed_audiences: ['www.alice.com', 'www.alice.com/admin'],
+          idp_ca_certs: ['certificate-1234', 'certificate-5678'],
         };
         break;
     }
diff --git a/addons/api/tests/unit/serializers/auth-method-test.js b/addons/api/tests/unit/serializers/auth-method-test.js
index c9c7ec1bb..ac2ecdcc4 100644
--- a/addons/api/tests/unit/serializers/auth-method-test.js
+++ b/addons/api/tests/unit/serializers/auth-method-test.js
@@ -37,6 +37,16 @@ module('Unit | Serializer | auth method', function (hooks) {
       attributes: {
         state: 'foo',
         account_claim_maps: [{ from: 'foo', to: 'bar' }],
+        claims_scopes: [{ value: 'profile' }, { value: 'email' }],
+        signing_algorithms: [{ value: 'RS256' }, { value: 'RS384' }],
+        allowed_audiences: [
+          { value: 'www.alice.com' },
+          { value: 'www.alice.com/admin' },
+        ],
+        idp_ca_certs: [
+          { value: 'certificate-1234' },
+          { value: 'certificate-5678' },
+        ],
       },
     });
 
@@ -48,6 +58,10 @@ module('Unit | Serializer | auth method', function (hooks) {
       description: null,
       attributes: {
         account_claim_maps: ['foo=bar'],
+        claims_scopes: ['profile', 'email'],
+        signing_algorithms: ['RS256', 'RS384'],
+        allowed_audiences: ['www.alice.com', 'www.alice.com/admin'],
+        idp_ca_certs: ['certificate-1234', 'certificate-5678'],
         api_url_prefix: null,
         callback_url: null,
         client_id: null,