diff --git a/test/archlinux/aur_poc/CMakeLists.txt b/test/archlinux/aur_poc/CMakeLists.txt
index dad3811..f677401 100644
--- a/test/archlinux/aur_poc/CMakeLists.txt
+++ b/test/archlinux/aur_poc/CMakeLists.txt
@@ -168,3 +168,12 @@ else()
 target_link_libraries(test_unicodecvt PRIVATE bux Catch2::Catch2WithMain stdc++ m)
 endif()
 add_test(NAME test_unicodecvt_All COMMAND test_unicodecvt)
+
+add_executable(test_lexbase test_lexbase.cpp)
+target_include_directories(test_lexbase PRIVATE ../include)
+if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+target_link_libraries(test_lexbase PRIVATE bux Catch2::Catch2WithMain)
+else()
+target_link_libraries(test_lexbase PRIVATE bux Catch2::Catch2WithMain stdc++ m)
+endif()
+add_test(NAME test_lexbase_All COMMAND test_lexbase)
diff --git a/test/archlinux/aur_poc/test_lexbase.cpp b/test/archlinux/aur_poc/test_lexbase.cpp
new file mode 100644
index 0000000..71b2037
--- /dev/null
+++ b/test/archlinux/aur_poc/test_lexbase.cpp
@@ -0,0 +1,23 @@
+/*
+    Test cases are organized according to ZOMBIES rules
+    http://blog.wingman-sw.com/tdd-guided-by-zombies
+*/
+#include <bux/LexBase.h>    // bux::asciiLiteral()
+//#include <bux/UnicodeCvt.h> // bux::BOM()
+#include <catch2/catch_test_macros.hpp>
+
+TEST_CASE("Regression errors", "[S]")
+{
+    CHECK(bux::asciiLiteral("::") == "::");
+    CHECK(bux::asciiLiteral("::=") == "::=");
+}
+
+TEST_CASE("Expectations", "[S]")
+{
+    CHECK(bux::asciiLiteral("\n") == "\\n");
+    CHECK(bux::asciiLiteral("\r") == "\\r");
+    CHECK(bux::asciiLiteral("\t") == "\\t");
+    //
+    CHECK(bux::asciiLiteral((const char*)u8"\u1234") == (const char*)u8"\u1234");
+    CHECK(bux::asciiLiteral((const char*)u8"\uABCD") == (const char*)u8"\uABCD");
+}
diff --git a/test/archlinux/aur_poc/test_unicodecvt.cpp b/test/archlinux/aur_poc/test_unicodecvt.cpp
index 888f443..da22073 100644
--- a/test/archlinux/aur_poc/test_unicodecvt.cpp
+++ b/test/archlinux/aur_poc/test_unicodecvt.cpp
@@ -2,7 +2,6 @@
     Test cases are organized according to ZOMBIES rules
     http://blog.wingman-sw.com/tdd-guided-by-zombies
 */
-//#include <bux/LexBase.h>    // bux::asciiLiteral()
 #include <bux/UnicodeCvt.h> // bux::to_utf8(), bux::BOM()
 #include <catch2/catch_test_macros.hpp>
 
@@ -40,8 +39,10 @@ TEST_CASE("String to utf-8 vs stringview to utf-8", "[S]")
     CHECK(bux::to_utf8(u16str) == (const char*)u8"一律轉成 utf-8");
     for (auto &ch: u16str)
         ch = std::byteswap(ch);
+#ifdef __unix__
     static constinit const char *const CHSETS_UTF16BE[] = {"UTF-16BE", "UTF16BE", "UCS-2BE", "USC2BE", 0};
     CHECK(bux::to_utf8(u16str, 0, CHSETS_UTF16BE) == (const char*)u8"一律轉成 utf-8");
+#endif
     CHECK(bux::to_utf8(u16str) == (const char*)u8"一律轉成 utf-8");
 
     CHECK(bux::to_utf8(u8"一律轉成 utf-8", 0, bux::ENCODING_UTF8) == (const char*)u8"一律轉成 utf-8");