diff --git a/spec/foreman/process_spec.rb b/spec/foreman/process_spec.rb
index 9a189b9..f9a54e0 100644
--- a/spec/foreman/process_spec.rb
+++ b/spec/foreman/process_spec.rb
@@ -41,7 +41,7 @@ describe Foreman::Process do
 
     it "should output utf8 properly" do
       process = Foreman::Process.new(resource_path("bin/utf8"))
-      run(process).should == "\xFF\x03\n".force_encoding('binary')
+      run(process).should == (Foreman.ruby_18? ? "\xFF\x03\n" : "\xFF\x03\n".force_encoding('binary'))
     end
   end