diff --git a/test/ruby/test_gc_compact.rb b/test/ruby/test_gc_compact.rb
index 5cdd06ffcf..8a3f1f145d 100644
--- a/test/ruby/test_gc_compact.rb
+++ b/test/ruby/test_gc_compact.rb
@@ -352,6 +352,7 @@ class TestGCCompact < Test::Unit::TestCase
 
   def test_moving_objects_between_size_pools
     omit if GC::INTERNAL_CONSTANTS[:SIZE_POOL_COUNT] == 1
+    omit "Flaky on Solaris" if /solaris/i =~ RUBY_PLATFORM
 
     assert_separately(%w[-robjspace], "#{<<~"begin;"}\n#{<<~"end;"}", timeout: 10, signal: :SEGV)
     begin;