diff --git a/.gitignore b/.gitignore
index b4df03f..e55e6bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,3 +39,5 @@ vendor/
 .*swp
 
 .idea
+
+.tool-versions
diff --git a/config/docker_test.yaml b/config/docker_test.yaml
index 5694800..7bc4e42 100644
--- a/config/docker_test.yaml
+++ b/config/docker_test.yaml
@@ -21,6 +21,7 @@ gcm:
     game:
       apiKey: game-api-key
       senderID: "1233456789"
+  concurrentWorkers: 10
 queue:
   topics:
     - "^push-[^-_]+_(apns|gcm)[_-](single|massive)"