--- a/modules/stdlib/spec/functions/is_array_spec.rb	Sat Jan 04 11:42:45 2020 +0000
+++ b/modules/stdlib/spec/functions/is_array_spec.rb	Sun Jan 26 11:36:07 2020 +0000
@@ -23,12 +23,12 @@
     # Checking for deprecation warning, which should only be provoked when the env variable for it is set.
     it 'displays a single deprecation' do
       ENV['STDLIB_LOG_DEPRECATIONS'] = 'true'
-      scope.expects(:warning).with(includes('This method is deprecated'))
+      expect(scope).to receive(:warning).with(include('This method is deprecated'))
       is_expected.to run.with_params(['1.2.3.4']).and_return(true)
     end
     it 'displays no warning for deprecation' do
       ENV['STDLIB_LOG_DEPRECATIONS'] = 'false'
-      scope.expects(:warning).with(includes('This method is deprecated')).never
+      expect(scope).to receive(:warning).with(include('This method is deprecated')).never
       is_expected.to run.with_params(['1.2.3.4']).and_return(true)
     end
   end