diff --git a/scripts/eressea/path.lua b/scripts/eressea/path.lua
index 085cda997..a1446e403 100644
--- a/scripts/eressea/path.lua
+++ b/scripts/eressea/path.lua
@@ -1,3 +1,15 @@
+local path = os.getenv("ERESSEA_DIR")
+if not path then
+    if config.install then
+	    path = config.install
+    else
+        path = '.'
+    end
+else
+    config.install = path
+end
+path = path .. "/scripts"
+package.path = path .. '/?.lua;' .. path .. '/?/init.lua;' .. package.path
 if config.paths ~= nil then
     for path in string.gmatch(config.paths, "([^:]+)") do
         package.path = package.path .. ';' .. path .. '/?.lua;' .. path .. '/?/init.lua'
diff --git a/scripts/map.lua b/scripts/map.lua
index 89504e6bd..40fb9a38e 100644
--- a/scripts/map.lua
+++ b/scripts/map.lua
@@ -1,9 +1,3 @@
-local path = 'scripts'
-if config.install then
-	path = config.install .. '/' .. path
-end
-package.path = path .. '/?.lua;' .. path .. '/?/init.lua;' .. package.path
-
 require 'eressea.path'
 require 'eressea'
 require 'eressea.xmlconf'
diff --git a/scripts/run-tests-e2.lua b/scripts/run-tests-e2.lua
index 0231724c5..baa9138e4 100644
--- a/scripts/run-tests-e2.lua
+++ b/scripts/run-tests-e2.lua
@@ -1,22 +1,15 @@
 -- Tests that work in all games. With game config of E2. 
 -- Tests are under scripts/test/e2 and all files must be in scripts/test/e2/init.lua
 
-lunit = require('lunit')
-if _VERSION >= 'Lua 5.2' then
-module = lunit.module
-end
-
-path = 'scripts'
-if config.install then
-    path = config.install .. '/' .. path
-end
-package.path = path .. '/?.lua;' .. path .. '/?/init.lua;' .. package.path
-
 config.rules = 'e2'
+lunit = require 'lunit'
+if _VERSION >= 'Lua 5.2' then
+    module = lunit.module
+end
 
+require 'eressea.path'
 require 'eressea'
 require 'eressea.xmlconf'
-require 'eressea.path'
 require 'tests.e2'
 
 rng.inject(0)
diff --git a/scripts/run-tests-e3.lua b/scripts/run-tests-e3.lua
index 6e28f34b1..a056d8105 100644
--- a/scripts/run-tests-e3.lua
+++ b/scripts/run-tests-e3.lua
@@ -1,21 +1,14 @@
 -- Tests that work in E3. With game config of E3. 
 -- Tests are under scripts/test/e3 and all files must be in scripts/test/e3/init.lua
 
-lunit = require('lunit')
-if _VERSION >= 'Lua 5.2' then
-module = lunit.module
-end
-
-path = 'scripts'
-if config.install then
-    path = config.install .. '/' .. path
-end
-package.path = path .. '/?.lua;' .. path .. '/?/init.lua;' .. package.path
-
 config.rules = 'e3'
+lunit = require 'lunit'
+if _VERSION >= 'Lua 5.2' then
+    module = lunit.module
+end
 
-require 'eressea'
 require 'eressea.path'
+require 'eressea'
 require 'eressea.xmlconf'
 require 'tests.e3'
 
diff --git a/scripts/run-tests.lua b/scripts/run-tests.lua
index 399d781e3..fb5681525 100644
--- a/scripts/run-tests.lua
+++ b/scripts/run-tests.lua
@@ -1,19 +1,13 @@
 -- Basic test without loading XML Config. Test care about needed settings.
 -- Tests are under scripts/test/ and all files must be in scripts/test/init.lua
 
-lunit = require('lunit')
+lunit = require 'lunit'
 if _VERSION >= 'Lua 5.2' then
 module = lunit.module
 end
 
-path = 'scripts'
-if config.install then
-    path = config.install .. '/' .. path
-end
-package.path = path .. '/?.lua;' .. path .. '/?/init.lua;' .. package.path
-
-require 'eressea'
 require 'eressea.path'
+require 'eressea'
 require 'tests'
 result = lunit.main()
 return result.errors + result.failed
diff --git a/scripts/run-turn.lua b/scripts/run-turn.lua
index 75bc80ea2..c4d1c5a63 100644
--- a/scripts/run-turn.lua
+++ b/scripts/run-turn.lua
@@ -1,3 +1,5 @@
+require 'eressea.path'
+
 function nmr_check(maxnmrs)
   local nmrs = get_nmrs(1)
   if nmrs > maxnmrs then
@@ -188,11 +190,6 @@ end
 
 math.randomseed(rng.random())
 
-local path = 'scripts'
-if config.install then
-    path = config.install .. '/' .. path
-end
-package.path = path .. '/?.lua;' .. path .. '/?/init.lua;' .. package.path
 require 'eressea'
 require 'eressea.xmlconf' -- read xml data
 
diff --git a/tests/runtests.bat b/tests/runtests.bat
index 86bd79aaa..80eefc9be 100644
--- a/tests/runtests.bat
+++ b/tests/runtests.bat
@@ -5,10 +5,12 @@ IF EXIST ..\build-vs12 SET BUILD=..\build-vs12\Debug
 IF EXIST ..\build-vs14 SET BUILD=..\build-vs14\Debug
 IF EXIST ..\build-vs15 SET BUILD=..\build-vs15\Debug
 IF EXIST ..\build-vs16 SET BUILD=..\build-vs16\Debug
+IF EXIST ..\out\build\x86-Debug\eressea.exe SET BUILD=..\out\build\x86-Debug
+IF EXIST ..\out\build\x64-Debug\eressea.exe SET BUILD=..\out\build\x64-Debug
 
 SET SERVER=%BUILD%\eressea.exe
 %BUILD%\test_eressea.exe
-REM SET LUA_PATH=..\share\lua\5.4\?.lua;;
+SET LUA_PATH=..\scripts\?.lua;..\share\lua\5.4\?.lua;;
 
 %SERVER% -v1 ..\scripts\run-tests.lua
 %SERVER% -v1 -re2 ..\scripts\run-tests-e2.lua