diff --git a/test/rinda/test_rinda.rb b/test/rinda/test_rinda.rb
index 762d3bf678..2c2c099a74 100644
--- a/test/rinda/test_rinda.rb
+++ b/test/rinda/test_rinda.rb
@@ -801,6 +801,8 @@ class TestRingServer < Test::Unit::TestCase
     tl0 << th
     yield
   rescue Timeout::Error => e
+    $stderr.puts "TestRingServer#with_timeout: timeout in #{n}s:"
+    $stderr.puts caller
     if tl
       bt = e.backtrace
       tl.each do |t|