diff --git a/fixtures/large_stdout/Procfile b/fixtures/large_stdout/Procfile
new file mode 100644
index 0000000..3684bb6
--- /dev/null
+++ b/fixtures/large_stdout/Procfile
@@ -0,0 +1,2 @@
+stdout1: ruby ./stdout.rb
+stdout2: ruby ./stdout.rb
diff --git a/fixtures/large_stdout/stdout.rb b/fixtures/large_stdout/stdout.rb
new file mode 100644
index 0000000..db2d87a
--- /dev/null
+++ b/fixtures/large_stdout/stdout.rb
@@ -0,0 +1,10 @@
+#!/usr/bin/env ruby
+
+$stdout.sync = true
+
+10.times do |i|
+  puts "sample log message... " * rand(i*1000) + "ok - #{i}"
+  sleep 1
+end
+
+puts "finish!"