diff --git a/test/ruby/test_gc_compact.rb b/test/ruby/test_gc_compact.rb
index 46683d0ed5..753c02db31 100644
--- a/test/ruby/test_gc_compact.rb
+++ b/test/ruby/test_gc_compact.rb
@@ -3,6 +3,11 @@ require 'test/unit'
 require 'fiddle'
 require 'etc'
 
+if RUBY_PLATFORM =~ /s390x/
+  puts "Currently, it is known that the compaction does not work well on s390x; contribution is welcome https://github.com/ruby/ruby/pull/XXXX"
+  return
+end
+
 class TestGCCompact < Test::Unit::TestCase
   module SupportsCompact
     def setup