diff --git a/lib/ably/auth.rb b/lib/ably/auth.rb
index 0befcb27..06b4598d 100644
--- a/lib/ably/auth.rb
+++ b/lib/ably/auth.rb
@@ -425,7 +425,7 @@ def extra_auth_headers
     # spec - RSA7e
     # @return string
     def client_id_for_request
-      options[:client_id] if options[:client_id] && using_basic_auth?
+      options[:client_id]
     end
 
     # Auth params used in URI endpoint for Realtime connections
diff --git a/spec/acceptance/realtime/client_spec.rb b/spec/acceptance/realtime/client_spec.rb
index a4f50ae9..b392d118 100644
--- a/spec/acceptance/realtime/client_spec.rb
+++ b/spec/acceptance/realtime/client_spec.rb
@@ -142,8 +142,7 @@
             context 'and an explicit client_id in ClientOptions' do
               let(:client_id) { random_str }
 
-              # Skipped because more clarification needed on RSA7e, see https://github.com/ably/ably-ruby/issues/425
-              xit 'allows uses the explicit client_id in the connection' do
+              it 'allows uses the explicit client_id in the connection' do
                 connection.__incoming_protocol_msgbus__.subscribe(:protocol_message) do |protocol_message|
                   if protocol_message.action == :connected
                     expect(protocol_message.connection_details.client_id).to eql(client_id)
diff --git a/spec/acceptance/realtime/connection_spec.rb b/spec/acceptance/realtime/connection_spec.rb
index 8827257a..36ca720f 100644
--- a/spec/acceptance/realtime/connection_spec.rb
+++ b/spec/acceptance/realtime/connection_spec.rb
@@ -383,12 +383,11 @@ def publish_and_check_disconnect(options = {})
               let(:client_id)      { random_str }
               let(:client_options) { default_options.merge(client_id: 'incompatible', token: token_string, key: nil, log_level: :none) }
 
-              # Skipped because more clarification needed on RSA7e, see https://github.com/ably/ably-ruby/issues/425
-              xit 'fails the connection' do
+              it 'fails the connection' do
                 expect(client.client_id).to eql('incompatible')
                 client.connection.once(:failed) do
                   expect(client.client_id).to eql('incompatible')
-                  expect(client.connection.error_reason.code).to eql(40101) # Invalid clientId for credentials
+                  expect(client.connection.error_reason.code).to eql(40102) # Incompatible clientId for credentials
                   stop_reactor
                 end
               end