Improve ancestor classes spec #518

Job	Run time
Test isolated (2.3)	3m 43s
Test isolated (2.3)	3m 43s
Tests: Ruby 2.3 - ubuntu	3m 17s
Tests: Ruby 2.3 - ubuntu	3m 17s
Test isolated (ruby)	3m 27s
Test isolated (ruby)	3m 27s
Tests: Ruby 2.4 - ubuntu	3m 17s
Tests: Ruby 2.4 - ubuntu	3m 17s
Tests: Ruby 2.5 - ubuntu	3m 15s
Tests: Ruby 2.5 - ubuntu	3m 15s
Tests: Ruby 2.6 - ubuntu	3m 17s
Tests: Ruby 2.6 - ubuntu	3m 17s
Tests: Ruby 2.7 - ubuntu	3m 18s
Tests: Ruby 2.7 - ubuntu	3m 18s
Tests: Ruby 3.0 - ubuntu	3m 3s
Tests: Ruby 3.0 - ubuntu	3m 3s
Tests: Ruby 3.1 - ubuntu	3m 8s
Tests: Ruby 3.1 - ubuntu	3m 8s
Tests: Ruby 3.2 - ubuntu	3m 5s
Tests: Ruby 3.2 - ubuntu	3m 5s
Tests: Ruby 3.3 - ubuntu	3m 3s
Tests: Ruby 3.3 - ubuntu	3m 3s
Tests: Ruby jruby - ubuntu	5m 9s
Tests: Ruby jruby - ubuntu	5m 9s
Tests: Ruby truffleruby - ubuntu	4m 31s
Tests: Ruby truffleruby - ubuntu	4m 5s
Tests: Ruby 3.3 - windows	6m 27s
Tests: Ruby 3.3 - windows	6m 27s
	1h 43m 34s

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