diff --git a/.rubocop.yml b/.rubocop.yml
index aa4094b..cb27cc7 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -22,8 +22,7 @@ Lint/UnusedMethodArgument:
   AllowUnusedKeywordArguments: true
 
 RSpec/DescribeClass:
-  Exclude:
-    - spec/tasks/active_storage_db_tasks_spec.rb
+  Enabled: false
 
 RSpec/ExampleLength:
   # Default is 5
diff --git a/spec/models/active_storage_db/file_spec.rb b/spec/models/active_storage_db/file_spec.rb
index 93868ea..51545f6 100644
--- a/spec/models/active_storage_db/file_spec.rb
+++ b/spec/models/active_storage_db/file_spec.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe ActiveStorageDB::File, type: :model do
+RSpec.describe ActiveStorageDB::File do
   let(:file) { create(:active_storage_db_file, ref: 'just_some_key') }
 
   context 'when creating a file with an already existing key' do
diff --git a/spec/requests/file_controller_spec.rb b/spec/requests/file_controller_spec.rb
index 71748ba..2e8828b 100644
--- a/spec/requests/file_controller_spec.rb
+++ b/spec/requests/file_controller_spec.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe 'File controller', type: :request do
+RSpec.describe 'File controller' do
   def create_blob(data: 'Hello world!', filename: 'hello.txt', content_type: 'text/plain', identify: true, record: nil)
     ActiveStorage::Blob.create_and_upload!(
       io: StringIO.new(data),
diff --git a/spec/requests/file_url_spec.rb b/spec/requests/file_url_spec.rb
index 9f75650..dd7d392 100644
--- a/spec/requests/file_url_spec.rb
+++ b/spec/requests/file_url_spec.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe 'File URL', type: :request do
+RSpec.describe 'File URL' do
   let(:app_url_helpers) { Rails.application.routes.url_helpers }
   let(:engine_url_helpers) { ActiveStorageDB::Engine.routes.url_helpers }
 
diff --git a/spec/service/active_storage/service/db_service_spec.rb b/spec/service/active_storage/service/db_service_spec.rb
index 9af4131..86fe38d 100644
--- a/spec/service/active_storage/service/db_service_spec.rb
+++ b/spec/service/active_storage/service/db_service_spec.rb
@@ -52,14 +52,14 @@
     describe '.compose' do
       subject(:compose) { service.compose(%w[key1 key2 key3], 'dest_key') }
 
-      let!(:db_file1) { create(:active_storage_db_file, ref: 'key1', data: 'first file') }
-      let!(:db_file2) { create(:active_storage_db_file, ref: 'key2', data: 'second file') }
-      let!(:db_file3) { create(:active_storage_db_file, ref: 'key3', data: 'third file') }
+      let!(:first_db_file) { create(:active_storage_db_file, ref: 'key1', data: 'first file') }
+      let!(:second_db_file) { create(:active_storage_db_file, ref: 'key2', data: 'second file') }
+      let!(:third_db_file) { create(:active_storage_db_file, ref: 'key3', data: 'third file') }
 
       it 'composes the source files' do
         expect { compose }.to change { ActiveStorageDB::File.where(ref: 'dest_key').count }.by(1)
         expect(compose).to be_a ActiveStorageDB::File
-        expect(compose.data).to eq [db_file1.data, db_file2.data, db_file3.data].join
+        expect(compose.data).to eq [first_db_file.data, second_db_file.data, third_db_file.data].join
       end
     end
   end
@@ -70,7 +70,7 @@
     before { upload }
 
     it 'deletes the file' do
-      expect { delete }.to change { ActiveStorageDB::File.count }.from(1).to(0)
+      expect { delete }.to change(ActiveStorageDB::File, :count).from(1).to(0)
     end
   end
 
@@ -80,7 +80,7 @@
     before { upload }
 
     it 'deletes the files' do
-      expect { delete_prefixed }.to change { ActiveStorageDB::File.count }.from(1).to(0)
+      expect { delete_prefixed }.to change(ActiveStorageDB::File, :count).from(1).to(0)
     end
   end
 
diff --git a/spec/tasks/active_storage_db_tasks_spec.rb b/spec/tasks/active_storage_db_tasks_spec.rb
index cbbec45..b9f59c9 100644
--- a/spec/tasks/active_storage_db_tasks_spec.rb
+++ b/spec/tasks/active_storage_db_tasks_spec.rb
@@ -6,16 +6,12 @@
   describe 'asdb:list' do
     subject(:task) { execute_task('asdb:list') }
 
-    let(:file1) { create(:active_storage_blob, filename: 'some file 1', created_at: Time.now - 1.hour) }
-    let(:file2) { create(:active_storage_blob, filename: 'some file 2', created_at: Time.now - 5.hour) }
-    let(:file3) { create(:active_storage_blob, filename: 'some file 3', created_at: Time.now - 3.hour) }
-
-    before do
-      [file1, file2, file3]
-    end
+    let!(:first_file) { create(:active_storage_blob, filename: 'some file 1', created_at: Time.now - 1.hour) }
+    let!(:second_file) { create(:active_storage_blob, filename: 'some file 2', created_at: Time.now - 5.hour) }
+    let!(:third_file) { create(:active_storage_blob, filename: 'some file 3', created_at: Time.now - 3.hour) }
 
     it 'prints the columns header + the list of 3 files', :aggregate_failures do
-      pattern = /#{file3.id}  #{file3.filename}.+#{file2.id}  #{file2.filename}.+#{file1.id}  #{file1.filename}/m
+      pattern = /#{third_file.id}  #{third_file.filename}.+#{second_file.id}  #{second_file.filename}.+#{first_file.id}  #{first_file.filename}/m
       expect(task).to match pattern
       expect(task.split("\n").size).to be 4
     end