diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 09dc0a8..5016fc7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,6 +21,10 @@ jobs:
         run: cmake --build build --config=Debug
       - name: build release
         run: cmake --build build --config=Release
+      - name: test debug
+        run: cd build; ctest -C Debug
+      - name: test release
+        run: cd build; ctest -C Release
   linux-clang:
     runs-on: ubuntu-latest
     steps:
@@ -33,6 +37,10 @@ jobs:
         run: cmake --build build --config=Debug
       - name: build release
         run: cmake --build build --config=Release
+      - name: test debug
+        run: cd build; ctest -C Debug
+      - name: test release
+        run: cd build; ctest -C Release
   windows-vs22:
     runs-on: windows-latest
     steps:
@@ -43,6 +51,10 @@ jobs:
         run: cmake --build build --config=Debug
       - name: build release
         run: cmake --build build --config=Release
+      - name: test debug
+        run: cd build; ctest -C Debug
+      - name: test release
+        run: cd build; ctest -C Release
   windows-clang:
     runs-on: windows-latest
     steps:
@@ -55,3 +67,7 @@ jobs:
         run: cmake --build build --config=Debug
       - name: build release
         run: cmake --build build --config=Release
+      - name: test debug
+        run: cd build; ctest -C Debug
+      - name: test release
+        run: cd build; ctest -C Release
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4602219..2af0924 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,8 @@ cmake_minimum_required(VERSION 3.24)
 set(project_name Tkge)
 project(${project_name})
 
+option(TKGE_BUILD_TESTS "Build Tkge unit tests" ${PROJECT_IS_TOP_LEVEL})
+
 set(CMAKE_CXX_STANDARD 23)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
@@ -12,3 +14,8 @@ add_subdirectory(Ext)
 
 add_subdirectory(Lib)
 add_subdirectory(App)
+
+if(TKGE_BUILD_TESTS)
+  enable_testing()
+  add_subdirectory(Tests)
+endif()
diff --git a/Lib/Include/Tkge/Assets/IAsset.hpp b/Lib/Include/Tkge/Assets/IAsset.hpp
index 7eb242d..4b6b2bd 100644
--- a/Lib/Include/Tkge/Assets/IAsset.hpp
+++ b/Lib/Include/Tkge/Assets/IAsset.hpp
@@ -4,6 +4,7 @@
 #include <cstddef>
 #include <memory>
 #include <span>
+#include <stdexcept>
 #include <string>
 
 namespace Tkge::Assets
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
new file mode 100644
index 0000000..9fc6d23
--- /dev/null
+++ b/Tests/CMakeLists.txt
@@ -0,0 +1,21 @@
+project(${project_name}-Tests)
+
+file(GLOB_RECURSE sources LIST_DIRECTORIES false "*.cpp")
+
+if(NOT "${sources}" STREQUAL "")
+  add_executable(${PROJECT_NAME})
+
+  target_link_libraries(${PROJECT_NAME} PRIVATE
+    ${project_name}::Lib
+    klib::klib-test-main
+  )
+
+  target_include_directories(${PROJECT_NAME} PRIVATE
+    "${CMAKE_CURRENT_SOURCE_DIR}" ,
+    ../Lib/Src
+  )
+
+  target_sources(${PROJECT_NAME} PRIVATE ${sources})
+
+  add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME})
+endif()
diff --git a/Tests/TestAssetLoader.cpp b/Tests/TestAssetLoader.cpp
new file mode 100644
index 0000000..7615941
--- /dev/null
+++ b/Tests/TestAssetLoader.cpp
@@ -0,0 +1,47 @@
+#include <Tkge/Assets/TextAsset.hpp>
+#include <klib/unit_test.hpp>
+#include <filesystem>
+#include <fstream>
+
+namespace
+{
+	using namespace Tkge;
+
+	struct TempFile
+	{
+		TempFile(const TempFile&) = delete;
+		TempFile(TempFile&&) = delete;
+		TempFile& operator=(const TempFile&) = delete;
+		TempFile& operator=(TempFile&&) = delete;
+
+		explicit TempFile(std::string path, const std::string_view text) : _path(std::move(path))
+		{
+			auto file = std::ofstream{_path};
+			ASSERT(file.is_open());
+			file << text;
+		}
+
+		~TempFile() { std::filesystem::remove(_path); }
+
+		[[nodiscard]] const std::string& GetPath() const { return _path; }
+
+	  private:
+		std::string _path;
+	};
+
+	TEST(TextAsset_Load)
+	{
+		static constexpr std::string_view Text{"Hello World"};
+
+		const auto file = TempFile{"Test.txt", Text};
+
+		auto stream = Assets::ReadonlyByteStream{file.GetPath()};
+		EXPECT(stream.GetStreamSize() > 0);
+
+		auto asset = Assets::TextAsset{};
+		EXPECT(asset.Load(std::move(stream)));
+
+		const auto& text = asset.Text();
+		EXPECT(text == Text);
+	}
+} // namespace