diff --git a/apps/openmw_test_suite/misc/test_resourcehelpers.cpp b/apps/openmw_test_suite/misc/test_resourcehelpers.cpp
index dda9ce4962..0db147d8a3 100644
--- a/apps/openmw_test_suite/misc/test_resourcehelpers.cpp
+++ b/apps/openmw_test_suite/misc/test_resourcehelpers.cpp
@@ -27,7 +27,7 @@ namespace
     {
         std::unique_ptr<VFS::Manager> mVFS = TestingOpenMW::createTestVFS({});
         EXPECT_EQ(correctSoundPath("sound\\foo.wav", mVFS.get()), "sound/foo.mp3");
-        EXPECT_EQ(correctSoundPath("SOUND\\foo.WAV", mVFS.get()), "SOUND/foo.mp3");
+        EXPECT_EQ(correctSoundPath("SOUND\\foo.WAV", mVFS.get()), "sound/foo.mp3");
     }
 
     namespace
diff --git a/apps/openmw_test_suite/testing_util.hpp b/apps/openmw_test_suite/testing_util.hpp
index 6a965adc18..89fb7f9e73 100644
--- a/apps/openmw_test_suite/testing_util.hpp
+++ b/apps/openmw_test_suite/testing_util.hpp
@@ -7,6 +7,7 @@
 #include <components/misc/strings/conversion.hpp>
 #include <components/vfs/archive.hpp>
 #include <components/vfs/manager.hpp>
+#include <components/vfs/pathutil.hpp>
 
 namespace TestingOpenMW
 {
@@ -49,21 +50,25 @@ namespace TestingOpenMW
 
     struct VFSTestData : public VFS::Archive
     {
-        std::map<std::string, VFS::File*> mFiles;
+        std::map<std::string, VFS::File*, VFS::Path::PathLess> mFiles;
 
-        VFSTestData(std::map<std::string, VFS::File*> files)
+        VFSTestData(std::map<std::string, VFS::File*, VFS::Path::PathLess> files)
             : mFiles(std::move(files))
         {
         }
 
-        void listResources(std::map<std::string, VFS::File*>& out) override { out = mFiles; }
+        void listResources(std::map<std::string, VFS::File*>& out) override
+        {
+            for (const auto& [key, value] : mFiles)
+                out.emplace(VFS::Path::normalizeFilename(key), value);
+        }
 
         bool contains(const std::string& file) const override { return mFiles.count(file) != 0; }
 
         std::string getDescription() const override { return "TestData"; }
     };
 
-    inline std::unique_ptr<VFS::Manager> createTestVFS(std::map<std::string, VFS::File*> files)
+    inline std::unique_ptr<VFS::Manager> createTestVFS(std::map<std::string, VFS::File*, VFS::Path::PathLess> files)
     {
         auto vfs = std::make_unique<VFS::Manager>();
         vfs->addArchive(std::make_unique<VFSTestData>(std::move(files)));
diff --git a/components/vfs/pathutil.hpp b/components/vfs/pathutil.hpp
index b400dc3bd0..3ffc13b4e2 100644
--- a/components/vfs/pathutil.hpp
+++ b/components/vfs/pathutil.hpp
@@ -1,50 +1,57 @@
-#ifndef OPENMW_COMPONENTS_RESOURCE_PATH_H
-#define OPENMW_COMPONENTS_RESOURCE_PATH_H
-
-#include <components/misc/strings/lower.hpp>
-
-#include <algorithm>
-#include <string>
-#include <string_view>
-
-namespace VFS::Path
-{
-    inline constexpr char normalize(char c)
-    {
-        return c == '\\' ? '/' : Misc::StringUtils::toLower(c);
-    }
-
-    inline void normalizeFilenameInPlace(std::string& name)
-    {
-        for (char& ch : name)
-            ch = normalize(ch);
-    }
-
-    /// Normalize the given filename, making slashes/backslashes consistent, and lower-casing.
-    [[nodiscard]] inline std::string normalizeFilename(std::string_view name)
-    {
-        std::string out(name);
-        normalizeFilenameInPlace(out);
-        return out;
-    }
-
-    struct PathCharLess
-    {
-        bool operator()(char x, char y) const { return normalize(x) < normalize(y); }
-    };
-
-    inline bool pathLess(std::string_view x, std::string_view y)
-    {
-        return std::lexicographical_compare(x.begin(), x.end(), y.begin(), y.end(), PathCharLess());
-    }
-
-    inline bool pathEqual(std::string_view x, std::string_view y)
-    {
-        if (std::size(x) != std::size(y))
-            return false;
-        return std::equal(
-            std::begin(x), std::end(x), std::begin(y), [](char l, char r) { return normalize(l) == normalize(r); });
-    }
-}
-
-#endif
+#ifndef OPENMW_COMPONENTS_RESOURCE_PATH_H
+#define OPENMW_COMPONENTS_RESOURCE_PATH_H
+
+#include <components/misc/strings/lower.hpp>
+
+#include <algorithm>
+#include <string>
+#include <string_view>
+
+namespace VFS::Path
+{
+    inline constexpr char normalize(char c)
+    {
+        return c == '\\' ? '/' : Misc::StringUtils::toLower(c);
+    }
+
+    inline void normalizeFilenameInPlace(std::string& name)
+    {
+        for (char& ch : name)
+            ch = normalize(ch);
+    }
+
+    /// Normalize the given filename, making slashes/backslashes consistent, and lower-casing.
+    [[nodiscard]] inline std::string normalizeFilename(std::string_view name)
+    {
+        std::string out(name);
+        normalizeFilenameInPlace(out);
+        return out;
+    }
+
+    struct PathCharLess
+    {
+        bool operator()(char x, char y) const { return normalize(x) < normalize(y); }
+    };
+
+    inline bool pathLess(std::string_view x, std::string_view y)
+    {
+        return std::lexicographical_compare(x.begin(), x.end(), y.begin(), y.end(), PathCharLess());
+    }
+
+    inline bool pathEqual(std::string_view x, std::string_view y)
+    {
+        if (std::size(x) != std::size(y))
+            return false;
+        return std::equal(
+            std::begin(x), std::end(x), std::begin(y), [](char l, char r) { return normalize(l) == normalize(r); });
+    }
+
+    struct PathLess
+    {
+        using is_transparent = void;
+
+        bool operator()(std::string_view left, std::string_view right) const { return pathLess(left, right); }
+    };
+}
+
+#endif