diff --git a/lib/tasks/turbo.rake b/lib/tasks/turbo.rake
index b14ec56fb91..48c5a91b7f7 100644
--- a/lib/tasks/turbo.rake
+++ b/lib/tasks/turbo.rake
@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 task 'turbo:spec' => :test do |t|
   require './lib/turbo_tests'
 
-  TurboTests::Runner.run([{name: 'progress', outputs: ['-']}], ['spec'])
+  TurboTests::Runner.run([{ name: 'progress', outputs: ['-'] }], ['spec'])
 end
diff --git a/lib/turbo_tests.rb b/lib/turbo_tests.rb
index 5e88601667f..b3715ae5332 100644
--- a/lib/turbo_tests.rb
+++ b/lib/turbo_tests.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'open3'
 require 'fileutils'
 require 'json'
diff --git a/lib/turbo_tests/json_rows_formatter.rb b/lib/turbo_tests/json_rows_formatter.rb
index e9379c574db..2ec66d0f8db 100644
--- a/lib/turbo_tests/json_rows_formatter.rb
+++ b/lib/turbo_tests/json_rows_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module TurboTests
   # An RSpec formatter used for each subprocess during parallel test execution
   class JsonRowsFormatter
@@ -50,37 +52,37 @@ module TurboTests
     end
 
     def example_passed(notification)
-      output_row({
+      output_row(
         type: :example_passed,
         example: example_to_json(notification.example)
-      })
+      )
     end
 
     def example_pending(notification)
-      output_row({
+      output_row(
         type: :example_pending,
         example: example_to_json(notification.example)
-      })
+      )
     end
 
     def example_failed(notification)
-      output_row({
+      output_row(
         type: :example_failed,
         example: example_to_json(notification.example)
-      })
+      )
     end
 
     def seed(notification)
-      output_row({
+      output_row(
         type: :seed,
         seed: notification.seed,
-      })
+      )
     end
 
     def close(notification)
-      output_row({
+      output_row(
         type: :close,
-      })
+      )
     end
 
     private
diff --git a/lib/turbo_tests/reporter.rb b/lib/turbo_tests/reporter.rb
index f9442fc410d..62a3db2e48d 100644
--- a/lib/turbo_tests/reporter.rb
+++ b/lib/turbo_tests/reporter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module TurboTests
   class Reporter
     def self.from_config(formatter_config, start_time)
diff --git a/lib/turbo_tests/runner.rb b/lib/turbo_tests/runner.rb
index 2e27f20fdb8..9f9b78d1b6c 100644
--- a/lib/turbo_tests/runner.rb
+++ b/lib/turbo_tests/runner.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 module TurboTests
   class Runner
-    def self.run(formatter_config, files, start_time=Time.now)
+    def self.run(formatter_config, files, start_time = Time.now)
       reporter = Reporter.from_config(formatter_config, start_time)
 
       new(reporter, files).run
@@ -49,16 +51,19 @@ module TurboTests
 
     def start_subprocess(tests, process_num)
       if tests.empty?
-        @messages << {type: 'exit', process_num: process_num}
+        @messages << {
+          type: 'exit',
+          process_num: process_num
+        }
       else
         begin
           File.mkfifo("tmp/test-pipes/subprocess-#{process_num}")
         rescue Errno::EEXIST
         end
 
-        stdin, stdout, stderr, wait_thr =
+        _stdin, stdout, stderr, _wait_thr =
           Open3.popen3(
-            {'TEST_ENV_NUMBER' => process_num.to_s},
+            { 'TEST_ENV_NUMBER' => process_num.to_s },
             "bundle", "exec", "rspec",
             "-f", "TurboTests::JsonRowsFormatter",
             "-o", "tmp/test-pipes/subprocess-#{process_num}",
@@ -76,7 +81,7 @@ module TurboTests
               end
             end
 
-            @messages << {type: 'exit', process_num: process_num}
+            @messages << { type: 'exit', process_num: process_num }
           end
 
         @threads << start_copy_thread(stdout, STDOUT)