diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index eaf4fa8..6d0cd50 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -14,7 +14,23 @@ $ bundle install --path vendor/bundle
 ### Run tests
 
 ```shell
-$ STREAM_KEY=my_api_key STREAM_SECRET=my_api_secret bundle exec rake spec
+$ STREAM_KEY=my_api_key STREAM_SECRET=my_api_secret bundle exec rspec spec
+```
+
+### Run specific test
+
+Add :focus tag on target test:
+
+```rb
+it 'can mark messages as read', :focus do
+    # test something
+end
+```
+
+And then run as following:
+
+```shell
+$ STREAM_KEY=myapi_key STREAM_SECRET=my_secret STREAM_CHAT_URL=http://127.0.0.1:3030 bundle exec rspec spec --tag focus
 ```
 
 ### Linters and type check
diff --git a/lib/stream-chat/channel.rb b/lib/stream-chat/channel.rb
index 91fb102..3a51ffd 100644
--- a/lib/stream-chat/channel.rb
+++ b/lib/stream-chat/channel.rb
@@ -219,7 +219,7 @@ def demote_moderators(user_ids)
     end
 
     # Sends the mark read event for this user, only works if the `read_events` setting is enabled.
-    sig { params(user_id: String, options: StringKeyHash).returns(StreamChat::StreamResponse) }
+    sig { params(user_id: String, options: T.untyped).returns(StreamChat::StreamResponse) }
     def mark_read(user_id, **options)
       payload = add_user_id(options, user_id)
       @client.post("#{url}/read", data: payload)
diff --git a/spec/client_spec.rb b/spec/client_spec.rb
index 41a68f1..ddd0cce 100644
--- a/spec/client_spec.rb
+++ b/spec/client_spec.rb
@@ -435,7 +435,7 @@ def loop_times(times)
 
     it 'offset with next should fail' do
       expect do
-        @client.search({ members: { '$in' => ['legolas'] } }, SecureRandom.uuid,  offset: 2, next: SecureRandom.uuid)
+        @client.search({ members: { '$in' => ['legolas'] } }, SecureRandom.uuid, offset: 2, next: SecureRandom.uuid)
       end.to raise_error(/cannot use offset with next or sort parameters/)
     end