diff --git a/test/etc/test_etc.rb b/test/etc/test_etc.rb
index cf32e40..feb05aa 100644
--- a/test/etc/test_etc.rb
+++ b/test/etc/test_etc.rb
@@ -175,6 +175,8 @@ def test_sysconfdir
 
   # All Ractor-safe methods should be tested here
   def test_ractor_parallel
+    omit "This test is flaky and intermittently failing now on ModGC workflow" if ENV['GITHUB_WORKFLOW'] == 'ModGC'
+
     assert_ractor(<<~RUBY, require: 'etc', timeout: 60)
       10.times.map do
         Ractor.new do