diff --git a/.circleci/config.yml b/.circleci/config.yml
index 177c93e9..76b413e7 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -11,15 +11,35 @@ orbs:
 
 jobs:
   run-specs-with-postgres:
-    executor: solidusio_extensions/postgres
+    executor:
+      name: solidusio_extensions/postgres
+      ruby_version: '3.1'
     steps:
-      - browser-tools/install-browser-tools
-      - solidusio_extensions/run-tests
+      - checkout
+      - browser-tools/install-chrome
+      - solidusio_extensions/run-tests-solidus-master
+      - solidusio_extensions/store-test-results
+
   run-specs-with-mysql:
-    executor: solidusio_extensions/mysql
+    executor:
+      name: solidusio_extensions/mysql
+      ruby_version: '3.0'
+    steps:
+      - checkout
+      - browser-tools/install-chrome
+      - solidusio_extensions/run-tests-solidus-current
+      - solidusio_extensions/store-test-results
+
+  run-specs-with-sqlite:
+    executor:
+      name: solidusio_extensions/sqlite
+      ruby_version: '2.7'
     steps:
-      - browser-tools/install-browser-tools
-      - solidusio_extensions/run-tests
+      - checkout
+      - browser-tools/install-chrome
+      - solidusio_extensions/run-tests-solidus-older
+      - solidusio_extensions/store-test-results
+
   lint-code:
     executor: solidusio_extensions/sqlite-memory
     steps:
@@ -30,6 +50,7 @@ workflows:
     jobs:
       - run-specs-with-postgres
       - run-specs-with-mysql
+      - run-specs-with-sqlite
       - lint-code
 
   "Weekly run specs against master":
@@ -43,3 +64,4 @@ workflows:
     jobs:
       - run-specs-with-postgres
       - run-specs-with-mysql
+      - run-specs-with-sqlite
diff --git a/.rubocop.yml b/.rubocop.yml
index 45161d45..df59fb56 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,7 +2,8 @@ require:
   - solidus_dev_support/rubocop
 
 AllCops:
-  NewCops: enable
+  NewCops: disable
+  TargetRubyVersion: '2.7'
   Exclude:
     - sandbox/**/*
     - spec/dummy/**/*
diff --git a/lib/paypal/paypal_http_client.rb b/lib/paypal/paypal_http_client.rb
index a1ce43bf..a653549c 100644
--- a/lib/paypal/paypal_http_client.rb
+++ b/lib/paypal/paypal_http_client.rb
@@ -11,8 +11,8 @@ def initialize(environment, refresh_token = nil)
       super(environment)
       @refresh_token = refresh_token
 
-      add_injector { _1._sign_request }
-      add_injector { _1._add_headers }
+      add_injector(&:_sign_request)
+      add_injector(&:_add_headers)
     end
 
     def user_agent
diff --git a/solidus_paypal_commerce_platform.gemspec b/solidus_paypal_commerce_platform.gemspec
index bb49edb4..0a6486e5 100644
--- a/solidus_paypal_commerce_platform.gemspec
+++ b/solidus_paypal_commerce_platform.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.metadata['changelog_uri'] = 'https://github.com/solidusio-contrib/solidus_paypal_commerce_platform/releases'
   spec.metadata['rubygems_mfa_required'] = 'true'
 
-  spec.required_ruby_version = Gem::Requirement.new('>= 2.5')
+  spec.required_ruby_version = Gem::Requirement.new('>= 2.7')
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
diff --git a/spec/models/solidus_paypal_commerce_platform/payment_method_spec.rb b/spec/models/solidus_paypal_commerce_platform/payment_method_spec.rb
index 8f6c193d..436a8c55 100644
--- a/spec/models/solidus_paypal_commerce_platform/payment_method_spec.rb
+++ b/spec/models/solidus_paypal_commerce_platform/payment_method_spec.rb
@@ -36,7 +36,7 @@ def Struct(data) # rubocop:disable Naming/MethodName
     let(:result) { Struct(purchase_units: [Struct(payments: payments)]) }
     let(:payments) { Struct(captures: [Struct(id: SecureRandom.hex(4))]) }
 
-    it "sends a purchase request to paypal" do # rubocop:disable Rspec/NoExpectationExample
+    it "sends a purchase request to paypal" do
       paypal_order_id = SecureRandom.hex(8)
       source = paypal_payment_method.payment_source_class.create(paypal_order_id: paypal_order_id)
       expect_request(:OrdersCaptureRequest).to receive(:new).with(paypal_order_id).and_call_original
@@ -48,7 +48,7 @@ def Struct(data) # rubocop:disable Naming/MethodName
     let(:result) { Struct(purchase_units: [Struct(payments: payments)]) }
     let(:payments) { Struct(authorizations: [Struct(id: SecureRandom.hex(4))]) }
 
-    it "sends an authorize request to paypal" do # rubocop:disable Rspec/NoExpectationExample
+    it "sends an authorize request to paypal" do
       paypal_order_id = SecureRandom.hex(8)
       source = paypal_payment_method.payment_source_class.create(paypal_order_id: paypal_order_id)
       expect_request(:OrdersAuthorizeRequest).to receive(:new).with(paypal_order_id)
@@ -87,7 +87,7 @@ def Struct(data) # rubocop:disable Naming/MethodName
   end
 
   describe "#void" do
-    it "sends a void request to paypal" do # rubocop:disable Rspec/NoExpectationExample
+    it "sends a void request to paypal" do
       authorization_id = SecureRandom.hex(8)
       source = paypal_payment_method.payment_source_class.create(authorization_id: authorization_id)
       payment.source = source