diff --git a/dev/tests/example.lua b/dev/tests/example.lua
index 3b724d47..f030222d 100644
--- a/dev/tests/example.lua
+++ b/dev/tests/example.lua
@@ -1 +1,3 @@
 print("Hello from the example test!")
+test.sleep(1)
+print("2")
diff --git a/res/scripts/stdlib.lua b/res/scripts/stdlib.lua
index d5f8eed1..9a5aa08a 100644
--- a/res/scripts/stdlib.lua
+++ b/res/scripts/stdlib.lua
@@ -9,6 +9,11 @@ function sleep(timesec)
     end
 end
 
+if test then
+    test.sleep = sleep
+    test.name = __VC_TEST_NAME
+end
+
 ------------------------------------------------
 ------------------- Events ---------------------
 ------------------------------------------------
diff --git a/src/engine.cpp b/src/engine.cpp
index 49386b65..8f970892 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -190,9 +190,15 @@ void Engine::runTest() {
         logger.info() << "nothing to do";
         return;
     }
+    int tps = 20;
+
     logger.info() << "starting test " << params.testFile;
     auto process = scripting::start_coroutine(params.testFile);
     while (process->isActive()) {
+        frame++;
+        delta = 1.0f / static_cast<float>(tps);
+        lastTime += delta;
+
         process->update();
     }
     logger.info() << "test finished";
@@ -466,6 +472,10 @@ double Engine::getDelta() const {
     return delta;
 }
 
+double Engine::getUptime() const {
+    return lastTime;
+}
+
 void Engine::setScreen(std::shared_ptr<Screen> screen) {
     // reset audio channels (stop all sources)
     audio::reset_channel(audio::get_channel_index("regular"));
@@ -534,3 +544,7 @@ SettingsHandler& Engine::getSettingsHandler() {
 network::Network& Engine::getNetwork() {
     return *network;
 }
+
+const CoreParameters& Engine::getCoreParameters() const {
+    return params;
+}
diff --git a/src/engine.hpp b/src/engine.hpp
index c3559fa8..a0d4a8e9 100644
--- a/src/engine.hpp
+++ b/src/engine.hpp
@@ -125,6 +125,8 @@ public:
     /// @brief Get current frame delta-time
     double getDelta() const;
 
+    double getUptime() const;
+
     /// @brief Get active assets storage instance
     Assets* getAssets();
     
@@ -166,4 +168,6 @@ public:
     SettingsHandler& getSettingsHandler();
 
     network::Network& getNetwork();
+
+    const CoreParameters& getCoreParameters() const;
 };
diff --git a/src/logic/scripting/lua/libs/api_lua.hpp b/src/logic/scripting/lua/libs/api_lua.hpp
index a3b2d152..23f3db66 100644
--- a/src/logic/scripting/lua/libs/api_lua.hpp
+++ b/src/logic/scripting/lua/libs/api_lua.hpp
@@ -37,6 +37,7 @@ extern const luaL_Reg packlib[];
 extern const luaL_Reg particleslib[]; // gfx.particles
 extern const luaL_Reg playerlib[];
 extern const luaL_Reg quatlib[];
+extern const luaL_Reg testlib[];
 extern const luaL_Reg text3dlib[]; // gfx.text3d
 extern const luaL_Reg timelib[];
 extern const luaL_Reg tomllib[];
diff --git a/src/logic/scripting/lua/libs/libtest.cpp b/src/logic/scripting/lua/libs/libtest.cpp
new file mode 100644
index 00000000..034a72fb
--- /dev/null
+++ b/src/logic/scripting/lua/libs/libtest.cpp
@@ -0,0 +1,5 @@
+#include "api_lua.hpp"
+
+const luaL_Reg testlib[] = {
+    {NULL, NULL}
+};
diff --git a/src/logic/scripting/lua/libs/libtime.cpp b/src/logic/scripting/lua/libs/libtime.cpp
index 93708dda..45ed4288 100644
--- a/src/logic/scripting/lua/libs/libtime.cpp
+++ b/src/logic/scripting/lua/libs/libtime.cpp
@@ -2,15 +2,18 @@
 #include "window/Window.hpp"
 #include "api_lua.hpp"
 
-static int l_time_uptime(lua::State* L) {
-    return lua::pushnumber(L, Window::time());
+using namespace scripting;
+
+static int l_uptime(lua::State* L) {
+    return lua::pushnumber(L, engine->getUptime());
 }
 
-static int l_time_delta(lua::State* L) {
-    return lua::pushnumber(L, scripting::engine->getDelta());
+static int l_delta(lua::State* L) {
+    return lua::pushnumber(L, engine->getDelta());
 }
 
 const luaL_Reg timelib[] = {
-    {"uptime", lua::wrap<l_time_uptime>},
-    {"delta", lua::wrap<l_time_delta>},
-    {NULL, NULL}};
+    {"uptime", lua::wrap<l_uptime>},
+    {"delta", lua::wrap<l_delta>},
+    {NULL, NULL}
+};
diff --git a/src/logic/scripting/lua/lua_engine.cpp b/src/logic/scripting/lua/lua_engine.cpp
index 8f477710..0a4e2259 100644
--- a/src/logic/scripting/lua/lua_engine.cpp
+++ b/src/logic/scripting/lua/lua_engine.cpp
@@ -9,6 +9,7 @@
 #include "util/stringutil.hpp"
 #include "libs/api_lua.hpp"
 #include "lua_custom_types.hpp"
+#include "engine.hpp"
 
 static debug::Logger logger("lua-state");
 static lua::State* main_thread = nullptr;
@@ -57,7 +58,10 @@ static void create_libs(State* L, StateType stateType) {
     openlib(L, "vec3", vec3lib);
     openlib(L, "vec4", vec4lib);
 
-    if (stateType == StateType::BASE) {
+    if (stateType == StateType::TEST) {
+        openlib(L, "test", testlib);
+    }
+    if (stateType == StateType::BASE || stateType == StateType::TEST) {
         openlib(L, "gui", guilib);
         openlib(L, "input", inputlib);
         openlib(L, "inventory", inventorylib);
@@ -110,11 +114,15 @@ void lua::init_state(State* L, StateType stateType) {
     newusertype<LuaVoxelFragment>(L);
 }
 
-void lua::initialize(const EnginePaths& paths) {
+void lua::initialize(const EnginePaths& paths, const CoreParameters& params) {
     logger.info() << LUA_VERSION;
     logger.info() << LUAJIT_VERSION;
 
-    main_thread = create_state(paths, StateType::BASE);
+    main_thread = create_state(
+        paths, params.headless ? StateType::TEST : StateType::BASE
+    );
+    lua::pushstring(main_thread, params.testFile.stem().u8string());
+    lua::setglobal(main_thread, "__VC_TEST_NAME");
 }
 
 void lua::finalize() {
diff --git a/src/logic/scripting/lua/lua_engine.hpp b/src/logic/scripting/lua/lua_engine.hpp
index dd1e794d..a70f5948 100644
--- a/src/logic/scripting/lua/lua_engine.hpp
+++ b/src/logic/scripting/lua/lua_engine.hpp
@@ -8,14 +8,16 @@
 #include "lua_util.hpp"
 
 class EnginePaths;
+struct CoreParameters;
 
 namespace lua {
     enum class StateType {
         BASE,
+        TEST,
         GENERATOR,
     };
 
-    void initialize(const EnginePaths& paths);
+    void initialize(const EnginePaths& paths, const CoreParameters& params);
     void finalize();
 
     bool emit_event(
diff --git a/src/logic/scripting/scripting.cpp b/src/logic/scripting/scripting.cpp
index 9abe534c..ec26bfcf 100644
--- a/src/logic/scripting/scripting.cpp
+++ b/src/logic/scripting/scripting.cpp
@@ -66,7 +66,7 @@ int scripting::load_script(
 
 void scripting::initialize(Engine* engine) {
     scripting::engine = engine;
-    lua::initialize(*engine->getPaths());
+    lua::initialize(*engine->getPaths(), engine->getCoreParameters());
 
     load_script(fs::path("stdlib.lua"), true);
     load_script(fs::path("classes.lua"), true);