diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index b1d925bb57..8b4a07d23b 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -147,6 +147,7 @@ end
   end
 
   def test_find_in_unresolved_tree_is_not_exponentiental
+    pend "currently slower in CI on TruffleRuby" if RUBY_ENGINE == 'truffleruby'
     num_of_pkg = 7
     num_of_version_per_pkg = 3
     packages = (0..num_of_pkg).map do |pkgi|