diff --git a/lib/mixlib/shellout.rb b/lib/mixlib/shellout.rb
index dc186a27..19be8f2c 100644
--- a/lib/mixlib/shellout.rb
+++ b/lib/mixlib/shellout.rb
@@ -248,7 +248,7 @@ def format_for_exception
     # running or died without setting an exit status (e.g., terminated by
     # `kill -9`).
     def exitstatus
-      @status && @status.exitstatus
+      @status&.exitstatus
     end
 
     # Run the command, writing the command's standard out and standard error
diff --git a/lib/mixlib/shellout/unix.rb b/lib/mixlib/shellout/unix.rb
index b8f42e0d..59003027 100644
--- a/lib/mixlib/shellout/unix.rb
+++ b/lib/mixlib/shellout/unix.rb
@@ -370,11 +370,11 @@ def reap_errant_child
         return if attempt_reap
 
         @terminate_reason = "Command exceeded allowed execution time, process terminated"
-        logger.error("Command exceeded allowed execution time, sending TERM") if logger
+        logger&.error("Command exceeded allowed execution time, sending TERM")
         Process.kill(:TERM, child_pgid)
         sleep 3
         attempt_reap
-        logger.error("Command exceeded allowed execution time, sending KILL") if logger
+        logger&.error("Command exceeded allowed execution time, sending KILL")
         Process.kill(:KILL, child_pgid)
         reap
 
diff --git a/lib/mixlib/shellout/windows.rb b/lib/mixlib/shellout/windows.rb
index 7ece3d1b..822d8a6c 100644
--- a/lib/mixlib/shellout/windows.rb
+++ b/lib/mixlib/shellout/windows.rb
@@ -89,7 +89,7 @@ def run_command
           # Start the process
           #
           process, profile, token = Process.create3(create_process_args)
-          logger.debug(format_process(process, app_name, command_line, timeout)) if logger
+          logger&.debug(format_process(process, app_name, command_line, timeout))
           begin
             # Start pushing data into input
             stdin_write << input if input
@@ -124,7 +124,7 @@ def run_command
                     kill_process_tree(process.process_id, wmi, logger)
                     Process.kill(:KILL, process.process_id)
                   rescue SystemCallError
-                    logger.warn("Failed to kill timed out process #{process.process_id}") if logger
+                    logger&.warn("Failed to kill timed out process #{process.process_id}")
                   end
 
                   raise Mixlib::ShellOut::CommandTimeout, [
@@ -398,20 +398,16 @@ def kill_process_tree(pid, wmi, logger)
 
       def kill_process(instance, logger)
         child_pid = instance.wmi_ole_object.processid
-        if logger
-          logger.debug([
+        logger&.debug([
             "killing child process #{child_pid}::",
             "#{instance.wmi_ole_object.Name} of parent #{pid}",
           ].join)
-        end
         Process.kill(:KILL, instance.wmi_ole_object.processid)
       rescue SystemCallError
-        if logger
-          logger.debug([
+        logger&.debug([
             "Failed to kill child process #{child_pid}::",
             "#{instance.wmi_ole_object.Name} of parent #{pid}",
           ].join)
-        end
       end
 
       def format_process(process, app_name, command_line, timeout)
diff --git a/lib/mixlib/shellout/windows/core_ext.rb b/lib/mixlib/shellout/windows/core_ext.rb
index 621efb98..1c2830b9 100644
--- a/lib/mixlib/shellout/windows/core_ext.rb
+++ b/lib/mixlib/shellout/windows/core_ext.rb
@@ -21,7 +21,6 @@
 
 # Add new constants for Logon
 module Process::Constants
-  private
 
   LOGON32_LOGON_INTERACTIVE = 0x00000002
   LOGON32_LOGON_BATCH = 0x00000004
@@ -148,15 +147,13 @@ def create3(args)
       si_hash = {}
 
       # If the startup_info key is present, validate its subkeys
-      if hash["startup_info"]
-        hash["startup_info"].each do |key, val|
-          key = key.to_s.downcase
-          unless valid_si_keys.include?(key)
-            raise ArgumentError, "invalid startup_info key '#{key}'"
-          end
-
-          si_hash[key] = val
+      hash["startup_info"]&.each do |key, val|
+        key = key.to_s.downcase
+        unless valid_si_keys.include?(key)
+          raise ArgumentError, "invalid startup_info key '#{key}'"
         end
+
+        si_hash[key] = val
       end
 
       # The +command_line+ key is mandatory unless the +app_name+ key
diff --git a/spec/mixlib/shellout_spec.rb b/spec/mixlib/shellout_spec.rb
index 0d444a3a..9e79fa8e 100644
--- a/spec/mixlib/shellout_spec.rb
+++ b/spec/mixlib/shellout_spec.rb
@@ -1095,7 +1095,7 @@ def shell_out_cmd
         end
 
         after do
-          @test_file.close if @test_file
+          @test_file&.close
         end
 
         let(:ruby_code) { "fd = File.for_fd(#{@test_file.to_i}) rescue nil; if fd; fd.seek(0); puts fd.read(5); end" }
@@ -1380,7 +1380,7 @@ def ruby_wo_shell(code)
       end
 
       context "with subprocess writing lots of data to both stdout and stderr" do
-        let(:expected_output_with) { lambda { |chr| (chr * 20_000) + (LINE_ENDING).to_s + (chr * 20_000) + (LINE_ENDING).to_s } }
+        let(:expected_output_with) { lambda { |chr| (chr * 20_000) + LINE_ENDING.to_s + (chr * 20_000) + LINE_ENDING.to_s } }
 
         context "when writing to STDOUT first" do
           let(:ruby_code) { %q{puts "f" * 20_000; STDERR.puts "u" * 20_000; puts "f" * 20_000; STDERR.puts "u" * 20_000} }
@@ -1543,7 +1543,7 @@ def ruby_wo_shell(code)
       let(:options) { { user: user } }
 
       it "should run as specified user" do
-        expect(running_user).to eql((user).to_s)
+        expect(running_user).to eql(user.to_s)
       end
     end
   end