Use assert_ractor for separating test processes

1 files changed, 4 insertions, 5 deletions

diff --git a/test/test_prime.rb b/test/test_prime.rb
index 8e8203e1c4..a0e8af59be 100644
--- a/test/test_prime.rb
+++ b/test/test_prime.rb
@@ -262,13 +262,12 @@ class TestPrime < Test::Unit::TestCase
       assert_equal 861, (100_000..110_000).count(&:prime?)
     end
 
-=begin
-  # now Ractor should not use in test-all process
     def test_prime_in_ractor
-      # Test usage of private constant...
-      assert_equal false, Ractor.new { ((2**13-1) * (2**17-1)).prime? }.take
+      assert_ractor(<<~RUBY, require: 'prime')
+        # Test usage of private constant...
+        assert_equal false, Ractor.new { ((2**13-1) * (2**17-1)).prime? }.take
+      RUBY
     end if defined?(Ractor)
-=end
   end
 
   def test_eratosthenes_works_fine_after_timeout