diff --git a/src/keel/asset.hpp b/src/keel/asset.hpp
index 2a59dbaf..04b258fc 100644
--- a/src/keel/asset.hpp
+++ b/src/keel/asset.hpp
@@ -4,8 +4,6 @@
 
 #pragma once
 
-#include <ox/std/defines.hpp>
-
 #include <ox/claw/claw.hpp>
 #include <ox/fs/fs.hpp>
 
diff --git a/src/keel/test/tests.cpp b/src/keel/test/tests.cpp
index 2a987548..6d14c398 100644
--- a/src/keel/test/tests.cpp
+++ b/src/keel/test/tests.cpp
@@ -5,15 +5,14 @@
 #undef NDEBUG
 
 #include <map>
-#include <string>
 #include <ox/std/std.hpp>
 
 #include <keel/keel.hpp>
 
-static std::map<std::string, ox::Error(*)()> tests = {
+static std::map<ox::String, ox::Error(*)()> tests = {
 	{
 		"writeUuidHeader",
-		[] {
+		[]() -> ox::Error {
 			constexpr ox::StringView uuidStr = "8d814442-f46e-4cc3-8edc-ca3c01cc86db";
 			constexpr ox::StringView hdr = "K1;8d814442-f46e-4cc3-8edc-ca3c01cc86db;";
 			oxRequire(uuid, ox::UUID::fromString(uuidStr));
@@ -21,7 +20,7 @@ static std::map<std::string, ox::Error(*)()> tests = {
 			ox::CharBuffWriter bw(buff);
 			oxReturnError(keel::writeUuidHeader(bw, uuid));
 			oxExpect(ox::StringView(buff.data(), buff.size()), hdr);
-			return OxError(0);
+			return {};
 		}
 	},
 };