test/unit/backends/test_abstract.rb in sshkit-1.23.1 vs test/unit/backends/test_abstract.rb in sshkit-1.23.2

@@ -110,10 +110,15 @@
 
         assert_equal 'cd ~/foo && /usr/bin/env cat file', backend.executed_command.to_command
       end
 
       def test_background_logs_deprecation_warnings
-        deprecation_out = ''
+        deprecation_out =
+          if RUBY_VERSION < "2.3"
+            ''
+          else
+            +''
+          end
         SSHKit.config.deprecation_output = deprecation_out
 
         ExampleBackend.new do
           background :ls
         end.run