diff -r 07b815faa6ac -r f00d03835dd9 src/server/test/vfs.c
--- a/src/server/test/vfs.c	Tue Dec 30 21:44:49 2025 +0100
+++ b/src/server/test/vfs.c	Tue Jan 13 18:09:20 2026 +0100
@@ -79,7 +79,7 @@
     TestVFS *vfs = dir->ctx->vfs->instance;
     TestVFSDir *vfsdir = (TestVFSDir*)dir;
     
-    cxmutstr prefix = cx_strcat(2, vfsdir->file->path, cx_str("/"));
+    cxmutstr prefix = cx_strcat(CX_NULLSTR, 2, vfsdir->file->path, cx_str("/"));
     
     // not the most efficient file system implementation ever, but it is only
     // for testing
@@ -89,6 +89,7 @@
     cx_foreach(TestVFSFile *, entry, vfsdir->i) {
         if(file) break;
         cxmutstr file_path = cx_strcat(
+                CX_NULLSTR, 
                 2,
                 prefix,
                 cx_str(test_resource_name(entry->path.ptr)));
@@ -193,7 +194,7 @@
             file->path = cx_strdup_a(pool_allocator(ctx->sn->pool), s_path);
             file->file.io = &test_file_io;
             
-            cxBufferInit(&file->content, pool_malloc(ctx->sn->pool, 2048), 2048, pool_allocator(ctx->sn->pool), 0);
+            cxBufferInit(&file->content, pool_allocator(ctx->sn->pool), pool_malloc(ctx->sn->pool, 2048), 2048, 0);
             
             cxMapPut(vfs->files, cx_hash_key((void*)s_path.ptr, s_path.length), file);
         } else {