diff --git a/src/cmd/cpu.rb b/src/cmd/cpu.rb
new file mode 100644
index 0000000..7153fdf
--- /dev/null
+++ b/src/cmd/cpu.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+# CPU command methods
+module CMD
+
+  def cpu_stress
+    puts('CPU stress test.')
+  end
+
+  module_function :cpu_stress
+
+end
diff --git a/src/pchwbm.rb b/src/pchwbm.rb
index 12d79d2..b1996e3 100755
--- a/src/pchwbm.rb
+++ b/src/pchwbm.rb
@@ -5,6 +5,8 @@
 require 'bundler/setup'
 require 'dry/cli'
 
+require_relative 'cmd/cpu'
+
 module PCHWBM
   module CLI
     # Commands module for dry-cli
@@ -12,6 +14,20 @@ module PCHWBM
 
       extend Dry::CLI::Registry
 
+      # CPU subcommand definition
+      module CPU
+        # CPU stress test command
+        class Stress < Dry::CLI::Command
+
+          desc 'CPU tests.'
+
+          def call(*)
+            CMD.cpu_stress()
+          end
+
+        end
+      end
+
       # Version subcommand definition
       class Version < Dry::CLI::Command
 
@@ -25,6 +41,9 @@ module PCHWBM
 
       # Register commands with the CLI
       register 'version', Version, aliases: ['v', '-v', '--version']
+      register 'cpu' do |prefix|
+        prefix.register('stress', CPU::Stress)
+      end
 
     end
   end