diff --git a/spec/rcfile_spec.rb b/spec/rcfile_spec.rb
index b05c9554..70a565c2 100644
--- a/spec/rcfile_spec.rb
+++ b/spec/rcfile_spec.rb
@@ -64,7 +64,7 @@
           secret: 'jkl012',
         },
       }
-      expect(File.world_writable?(rcfile.path)).to be nil
+      expect(File.world_writable?(rcfile.path)).to be_nil
     end
     it 'is not be world readable' do
       rcfile = T::RCFile.instance
@@ -78,7 +78,7 @@
           secret: 'jkl012',
         },
       }
-      expect(File.world_readable?(rcfile.path)).to be nil
+      expect(File.world_readable?(rcfile.path)).to be_nil
     end
   end