diff --git a/code/controllers/master.dm b/code/controllers/master.dm
index 57c2323c42..c34431052f 100644
--- a/code/controllers/master.dm
+++ b/code/controllers/master.dm
@@ -65,7 +65,7 @@ GLOBAL_REAL(Master, /datum/controller/master) = new
 	// Highlander-style: there can only be one! Kill off the old and replace it with the new.
 
 	if(!random_seed)
-		random_seed = rand(1, 1e9)
+		random_seed = (TEST_RUN_PARAMETER in world.params) ? 29051994 : rand(1, 1e9)
 		rand_seed(random_seed)
 	
 	var/list/_subsystems = list()