diff --git a/test/integration/integration_helper.rb b/test/integration/integration_helper.rb
index e6a7810..5242573 100644
--- a/test/integration/integration_helper.rb
+++ b/test/integration/integration_helper.rb
@@ -50,7 +50,7 @@ def docker_launch
     try = 0
     while `docker inspect -f {{.State.Running}} #{container_name}`.strip != "true"
       raise "Failed to start container" if try > 10
-      tty += 1
+      try += 1
       sleep 1
     end
   end