diff --git a/deps/ox/src/ox/std/test/CMakeLists.txt b/deps/ox/src/ox/std/test/CMakeLists.txt
index 140a7c1d..a16dd009 100644
--- a/deps/ox/src/ox/std/test/CMakeLists.txt
+++ b/deps/ox/src/ox/std/test/CMakeLists.txt
@@ -19,3 +19,4 @@ add_test("[ox/std] HeapMgr" StdTest malloc)
 add_test("[ox/std] Serialize-Int" StdTest "Serialize-Int")
 add_test("[ox/std] BufferWriter" StdTest "BufferWriter")
 add_test("[ox/std] StringSplit" StdTest "StringSplit")
+add_test("[ox/std] ToHex" StdTest "ToHex")
diff --git a/deps/ox/src/ox/std/test/tests.cpp b/deps/ox/src/ox/std/test/tests.cpp
index 7f5b7c91..d5916dbf 100644
--- a/deps/ox/src/ox/std/test/tests.cpp
+++ b/deps/ox/src/ox/std/test/tests.cpp
@@ -9,6 +9,7 @@
 #undef NDEBUG
 
 #include <map>
+#include <ox/std/uuid.hpp>
 #include <ox/std/std.hpp>
 
 static std::map<ox::String, ox::Error(*)()> tests = {
@@ -155,6 +156,25 @@ static std::map<ox::String, ox::Error(*)()> tests = {
 			return OxError(0);
 		}
 	},
+	{
+		"ToHex",
+		[] {
+			oxExpect(ox::detail::toHex(0x01), "01");
+			oxExpect(ox::detail::toHex(0x02), "02");
+			oxExpect(ox::detail::toHex(0x03), "03");
+			oxExpect(ox::detail::toHex(0x04), "04");
+			oxExpect(ox::detail::toHex(0x05), "05");
+			oxExpect(ox::detail::toHex(0x06), "06");
+			oxExpect(ox::detail::toHex(0x07), "07");
+			oxExpect(ox::detail::toHex(0x08), "08");
+			oxExpect(ox::detail::toHex(0x0d), "0d");
+			oxExpect(ox::detail::toHex(0x0e), "03");
+			oxExpect(ox::detail::toHex(0x0f), "0f");
+			oxExpect(ox::detail::toHex(0x93), "93");
+			oxExpect(ox::detail::toHex(0x40), "40");
+			return OxError(0);
+		}
+	},
 	{
 		"StringSplit",
 		[] {