correct mocking

Signed-off-by: Lamont Granquist <[email protected]>

Author: lamont-granquist

spec/unit/health_check_spec.rb

@@ -118,12 +118,13 @@ def mkdump(base, size, x64 = false)
       end
 
       let(:failed_list) do
-        double("Mixlib::Shellout",
-          error!: { raise "Mixlib::Shellout::ShellCommandFailed" }
+        failed_list = double("Mixlib::Shellout",
           stdout: <<~EOH
             /opt/chefdk/shouldnt/matter
           EOH
         )
+        allow(failed_list).to receive(:error!).and_raise("Mixlib::Shellout::ShellCommandFailed")
+        failed_list
       end
 
       let(:bad_list) do