diff --git a/mods/CORE/pyutest/init.lua b/mods/CORE/pyutest/init.lua
index a5fe093..cfa33b0 100644
--- a/mods/CORE/pyutest/init.lua
+++ b/mods/CORE/pyutest/init.lua
@@ -5,15 +5,15 @@ PyuTest.BLOCK_FAST = 3
 PyuTest.BLOCK_NORMAL = 2
 PyuTest.BLOCK_SLOW = 1
 
-PyuTest.SURFACE_BOTTOM = 1
+PyuTest.OVERWORLD_SURFACE_BOTTOM = 1
 PyuTest.OVERWORLD_TOP = 4096
 PyuTest.OVERWORLD_BOTTOM = -65
 
 -- these values are yoinked from VoxeLibre
 -- (https://git.minetest.land/VoxeLibre/VoxeLibre/src/branch/master/mods/MAPGEN/mcl_biomes/init.lua)
-PyuTest.OCEAN_MIN = -15
-PyuTest.DEEP_OCEAN_MAX = PyuTest.OCEAN_MIN - 1
-PyuTest.DEEP_OCEAN_MIN = -31
+PyuTest.OVERWORLD_OCEAN_MIN = -15
+PyuTest.OVERWORLD_DEEP_OCEAN_MAX = PyuTest.OVERWORLD_OCEAN_MIN - 1
+PyuTest.OVERWORLD_DEEP_OCEAN_MIN = -31
 
 PyuTest.get_schem_path = function (name)
   return minetest.get_modpath("pyutest") .. "/schematics/"..name..".mts"