diff --git a/activejob/test/support/integration/adapters/sidekiq.rb b/activejob/test/support/integration/adapters/sidekiq.rb
index 0c01f4e83e..c6cdc3fbb1 100644
--- a/activejob/test/support/integration/adapters/sidekiq.rb
+++ b/activejob/test/support/integration/adapters/sidekiq.rb
@@ -24,6 +24,7 @@ module SidekiqJobsManager
     continue_read, continue_write = IO.pipe
     death_read, death_write = IO.pipe
 
+    sleep 1
     @pid = fork do
       continue_read.close
       death_write.close