diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e9ae8e1..8499e97 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -2,9 +2,9 @@ name: Ruby
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "master" ]
   pull_request:
-    branches: [ "main" ]
+    branches: [ "master" ]
 
 permissions:
   contents: read
diff --git a/Rakefile b/Rakefile
index 54caecd..4dbe116 100644
--- a/Rakefile
+++ b/Rakefile
@@ -6,12 +6,3 @@ load "rails/tasks/engine.rake"
 load "rails/tasks/statistics.rake"
 
 require "bundler/gem_tasks"
-require 'github_changelog_generator/task'
-
-GitHubChangelogGenerator::RakeTask.new :changelog do |config|
-  config.user = ENV.fetch('GITHUB_USER', nil)
-  if config.user.nil?
-    puts "env. var. GITHUB_USER is not set"
-    return
-  end
-end