diff --git a/mods/PLAYER/mcl_playerplus/init.lua b/mods/PLAYER/mcl_playerplus/init.lua
index ef7a14e9..a7dba3b0 100644
--- a/mods/PLAYER/mcl_playerplus/init.lua
+++ b/mods/PLAYER/mcl_playerplus/init.lua
@@ -40,9 +40,10 @@ local function close_enough(a,b)
 	return rt
 end
 
-local function set_properties_conditional(player,props)
-	local oldprops=player:get_properties()
-	local changed=true
+
+
+local function props_changed(props,oldprops)
+	local changed=false
 	local p={}
 	for k,v in pairs(props) do
 		if not close_enough(v,oldprops[k]) then
@@ -50,6 +51,68 @@ local function set_properties_conditional(player,props)
 			changed=true
 		end
 	end
+	return changed,p
+end
+
+--test if assert works
+assert(true)
+assert(not false)
+
+--test data for == and ~=
+local test_equal1=42
+local test_equal2=42.0
+local test_equal3=42.1
+
+assert(test_equal1==test_equal1)
+assert(test_equal1==test_equal2)
+assert(test_equal1~=test_equal3)
+
+--testdata for roundN
+local test_round1=15
+local test_round2=15.00199999999
+local test_round3=15.00111111
+local test_round4=15.00999999
+
+assert(roundN(test_round1,2)==roundN(test_round1,2)) --test again if basic equality works because wth not
+assert(roundN(test_round1,2)==roundN(test_round2,2))
+assert(roundN(test_round1,2)==roundN(test_round3,2))
+assert(roundN(test_round1,2)~=roundN(test_round4,2))
+
+
+-- tests for close_enough
+local test_cb = {-0.35,0,-0.35,0.35,0.8,0.35} --collisionboxes
+local test_cb_close = {-0.351213,0,-0.35,0.35,0.8,0.351212}
+local test_cb_diff = {-0.35,0,-1.35,0.35,0.8,0.35}
+
+local test_eh = 1.65 --eye height
+local test_eh_close = 1.65123123
+local test_eh_diff = 1.35
+
+local test_nt = { r = 225, b = 225, a = 225, g = 225 } --nametag
+local test_nt_diff = { r = 225, b = 225, a = 0, g = 225 }
+
+assert(close_enough(test_cb,test_cb_close))
+assert(not close_enough(test_cb,test_cb_diff))
+
+assert(close_enough(test_eh,test_eh_close))
+assert(not close_enough(test_eh,test_eh_diff))
+
+assert(not close_enough(test_nt,test_nt_diff)) --no floats involved here
+
+--tests for props_changed
+local test_properties_set1={collisionbox = {-0.35,0,-0.35,0.35,0.8,0.35}, eye_height = 0.65, nametag_color = { r = 225, b = 225, a = 225, g = 225 }}
+local test_properties_set2={collisionbox = {-0.35,0,-0.35,0.35,0.8,0.35}, eye_height = 1.35, nametag_color = { r = 225, b = 225, a = 225, g = 225 }}
+
+local test_p1,p=props_changed(test_properties_set1,test_properties_set1)
+local test_p2,p=props_changed(test_properties_set1,test_properties_set2)
+
+assert(not test_p1)
+assert(test_p2)
+
+-- we still don't really know if lua is lying to us! but at least everything *seems* to be ok
+
+local function set_properties_conditional(player,props)
+	local changed,p=props_changed(props,player:get_properties())
 	if changed then
 		player:set_properties(p)
 	end