diff --git a/src/common/lib/client/auth.ts b/src/common/lib/client/auth.ts
index d0b6bd164..8362ce059 100644
--- a/src/common/lib/client/auth.ts
+++ b/src/common/lib/client/auth.ts
@@ -995,6 +995,11 @@ class Auth {
         this._userSetClientId(authOptions.clientId);
       }
 
+      /* AO2: authMethod defaults to GET and is stored on the options object */
+      if (!('authMethod' in authOptions)) {
+        authOptions.authMethod = 'GET';
+      }
+
       this.authOptions = authOptions;
     }
   }
diff --git a/test/uts/deviations.md b/test/uts/deviations.md
index a8d39d32c..095ed001b 100644
--- a/test/uts/deviations.md
+++ b/test/uts/deviations.md
@@ -110,18 +110,6 @@ These tests assert spec behavior but are skipped by default because they are kno
 
 ---
 
-### options_types: AO2 - authMethod default not stored
-
-**Spec (AO2)**: `authMethod` should default to `'GET'` and be stored in auth options.
-
-**ably-js behavior**: Default `authMethod` is not stored.
-
-**Test**: `AO2 - authMethod defaults to GET`.
-
-**Issue**: [#2205](https://github.com/ably/ably-js/issues/2205)
-
----
-
 ### channels: RTL4c - errorReason not cleared on successful re-attach
 
 **Spec (RTL4c, proposed)**: When a confirmation ATTACHED is received, the channel's errorReason should be set to null.
diff --git a/test/uts/rest/unit/types/options_types.test.ts b/test/uts/rest/unit/types/options_types.test.ts
index 44ca0ad80..e3178d148 100644
--- a/test/uts/rest/unit/types/options_types.test.ts
+++ b/test/uts/rest/unit/types/options_types.test.ts
@@ -166,8 +166,6 @@ describe('uts/rest/unit/types/options_types', function () {
    */
   // UTS: rest/unit/AO2/auth-options-attributes-0.1
   it('AO2 - authMethod defaults to GET', function () {
-    // DEVIATION: see deviations.md
-    if (!process.env.RUN_DEVIATIONS) this.skip();
     installMockHttp(simpleMock());
     const client = new Ably.Rest({
       authUrl: 'https://auth.example.com/token',