diff --git a/tgs.yml b/.tgs.yml
similarity index 96%
rename from tgs.yml
rename to .tgs.yml
index 8c837dc0..90cf9730 100644
--- a/tgs.yml
+++ b/.tgs.yml
@@ -3,7 +3,7 @@
 version: 1
 # The BYOND version to use (kept in sync with dependencies.sh by the "TGS Test Suite" CI job)
 # Must be interpreted as a string, keep quoted
-byond: "515.1630"
+byond: "514.1589"
 # Folders to create in "<instance_path>/Configuration/GameStaticFiles/"
 static_files:
   # Config directory should be static