diff --git a/unittests/APITests/CMakeLists.txt b/unittests/APITests/CMakeLists.txt
index 2ee1473f9..f6d529915 100644
--- a/unittests/APITests/CMakeLists.txt
+++ b/unittests/APITests/CMakeLists.txt
@@ -1,5 +1,7 @@
 set (TESTS
-  InterruptableConditionVariable)
+  InterruptableConditionVariable
+  LexicallyNormal
+  )
 
 list(APPEND LIBS FEXCore)
 
diff --git a/unittests/APITests/LexicallyNormal.cpp b/unittests/APITests/LexicallyNormal.cpp
new file mode 100644
index 000000000..b9d3471c9
--- /dev/null
+++ b/unittests/APITests/LexicallyNormal.cpp
@@ -0,0 +1,30 @@
+#include <catch2/catch.hpp>
+#include <filesystem>
+#include <FEXHeaderUtils/Filesystem.h>
+
+#define TestPath(Path) \
+  REQUIRE(std::string_view(FHU::Filesystem::LexicallyNormal(Path)) == std::string_view(std::filesystem::path(Path).lexically_normal().string()));
+
+TEST_CASE("LexicallyNormal") {
+  TestPath("");
+  TestPath("/");
+  TestPath("/./");
+  TestPath("//.");
+  TestPath("//./");
+  TestPath("//.//");
+
+  TestPath(".");
+  TestPath("..");
+  TestPath(".//");
+  TestPath("../../");
+  TestPath("././");
+  TestPath("./../");
+  TestPath("./../");
+  TestPath("./.././.././.");
+  TestPath("./.././.././..");
+
+  TestPath("./foo/../");
+  TestPath("foo/./bar/..");
+  TestPath("foo/.///bar/..");
+  TestPath("foo/.///bar/../");
+}