diff --git a/lib/rspec/support/object_formatter.rb b/lib/rspec/support/object_formatter.rb
index 6f74061..6c83209 100644
--- a/lib/rspec/support/object_formatter.rb
+++ b/lib/rspec/support/object_formatter.rb
@@ -243,7 +243,12 @@ module RSpec
         DescribableMatcherInspector,
         DelegatorInspector,
         InspectableObjectInspector
-      ]
+      ].tap do |classes|
+        # 2.4 has improved BigDecimal formatting so we do not need
+        # to provide our own.
+        # https://github.com/ruby/bigdecimal/pull/42
+        classes.delete(BigDecimalInspector) if RUBY_VERSION >= '2.4'
+      end
     end
   end
 end