1 files changed, 4 insertions, 1 deletions
diff --git a/lib/test/unit/parallel.rb b/lib/test/unit/parallel.rb
index 232aa44151..32f15382ec 100644
--- a/lib/test/unit/parallel.rb
+++ b/lib/test/unit/parallel.rb
@@ -137,7 +137,10 @@ module Test
         rescue Errno::EPIPE
         rescue Exception => e
           begin
-            _report "bye", Marshal.dump(e)
+            trace = e.backtrace
+            err = ["#{trace.shift}: #{e.message} (#{e.class})"] + trace.map{|t| t.prepend("\t") }
+
+            _report "bye", Marshal.dump(err.join("\n"))
           rescue Errno::EPIPE;end
           exit
         ensure