1 files changed, 2 insertions, 2 deletions
diff --git a/lib/pp.rb b/lib/pp.rb
index e19edef0ee..7d1c502817 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -311,7 +311,7 @@ class PP < PrettyPrint
         inspect_method = method_method.call(:inspect)
       rescue NameError
       end
-      if inspect_method && /\(Kernel\)#/ !~ inspect_method.inspect
+      if inspect_method && inspect_method.owner != Kernel
         q.text self.inspect
       elsif !inspect_method && self.respond_to?(:inspect)
         q.text self.inspect
@@ -345,7 +345,7 @@ class PP < PrettyPrint
     # However, doing this requires that every class that #inspect is called on
     # implement #pretty_print, or a RuntimeError will be raised.
     def pretty_print_inspect
-      if /\(PP::ObjectMixin\)#/ =~ Object.instance_method(:method).bind(self).call(:pretty_print).inspect
+      if Object.instance_method(:method).bind(self).call(:pretty_print).owner == PP::ObjectMixin
         raise "pretty_print is not overridden for #{self.class}"
       end
       PP.singleline_pp(self, ''.dup)