diff --git a/tests/test_media_delivery_download.c b/tests/test_media_delivery_download.c
index 5d17d43f..4402556f 100644
--- a/tests/test_media_delivery_download.c
+++ b/tests/test_media_delivery_download.c
@@ -16,7 +16,6 @@
 #include "../lib/u_async.h"
 #include "../lib/debug_config.h"
 #include "../lib/mem.h"
-#include "test_utils.h"
 #include "../transport_layer/secure_channel.h"
 #include "../routing_layer/topo_node_sqlite.h"
 #include "../routing_layer/conn_mgr.h"
@@ -58,7 +57,13 @@ static int file_size(const char* path) {
 
 static void test_setup(void) {
     snprintf(g_temp_dir, sizeof(g_temp_dir), "%s", TEMP_DIR);
-    if (test_mkdtemp(g_temp_dir) != 0) { fprintf(stderr, "mkdtemp failed\n"); exit(1); }
+#ifdef _WIN32
+    { char tmp_path[512]; GetTempPathA(sizeof(tmp_path), tmp_path);
+      snprintf(g_temp_dir, sizeof(g_temp_dir), "%s\\utun_test_%08x", tmp_path, (unsigned)rand());
+      _mkdir(g_temp_dir); }
+#else
+    if (!mkdtemp(g_temp_dir)) { fprintf(stderr, "mkdtemp failed\n"); exit(1); }
+#endif
     debug_config_init(); debug_set_level(DEBUG_LEVEL_ERROR);
     g_ua = uasync_create();
 }
diff --git a/tests/test_media_delivery_full.c b/tests/test_media_delivery_full.c
index cd68327e..06176694 100644
--- a/tests/test_media_delivery_full.c
+++ b/tests/test_media_delivery_full.c
@@ -22,7 +22,6 @@
 #include "../lib/u_async.h"
 #include "../lib/debug_config.h"
 #include "../lib/mem.h"
-#include "test_utils.h"
 
 #include <sqlite3.h>
 #include <openssl/evp.h>
@@ -61,6 +60,15 @@ static char* gv(const char* p, const char* k) {
     char* r = (strcmp(k, "pub") == 0) ? u_strdup(c->global.my_public_key_hex) : u_strdup(c->global.my_private_key_hex);
     free_config(c); return r;
 }
+static void t_mkdtemp(char* t) {
+#ifdef _WIN32
+    char tmp_path[512]; GetTempPathA(sizeof(tmp_path), tmp_path);
+    snprintf(t, 256, "%s\\utun_test_%08x", tmp_path, (unsigned)rand());
+    _mkdir(t);
+#else
+    (void)!mkdtemp(t);
+#endif
+}
 static void t_rmdir(const char* p) { char cmd[512]; snprintf(cmd, sizeof(cmd), "rm -rf %s", p); system(cmd); }
 
 static int db_count(sqlite3* db, const char* tbl, const char* wh, uint64_t val) {
@@ -308,7 +316,7 @@ int main(void) {
     utun_instance_set_tun_init_enabled(0);
     srand((unsigned)time(NULL));
     printf("=== test_media_delivery_full ===\n");
-    test_mkdtemp(g_tdir);
+    t_mkdtemp(g_tdir);
 
     for (int i = 0; i < N_NODES; i++) {
         snprintf(g_cfg[i], sizeof(g_cfg[i]), "%s/n%d.conf", g_tdir, i);
diff --git a/tests/test_media_delivery_integration.c b/tests/test_media_delivery_integration.c
index 1dc76707..965b07b0 100644
--- a/tests/test_media_delivery_integration.c
+++ b/tests/test_media_delivery_integration.c
@@ -16,7 +16,6 @@
 #include "../transport_layer/etcp.h"
 #include "../config_parser.h"
 #include "../config_updater.h"
-#include "test_utils.h"
 #include "../routing_layer/topo_group.h"
 #include "../routing_layer/topo_node.h"
 #include "../lib/u_async.h"
@@ -59,6 +58,21 @@ static char* gv(const char* p, const char* k) {
     free_config(c); return r;
 }
 
+static void test_mkdtemp(char* tmpl) {
+#ifdef _WIN32
+    char tmp_path[512]; GetTempPathA(sizeof(tmp_path), tmp_path);
+    snprintf(tmpl, 256, "%s\\utun_test_%08x", tmp_path, (unsigned)rand());
+    _mkdir(tmpl);
+#else
+    (void)!mkdtemp(tmpl);
+#endif
+}
+
+static void test_unlink(const char* p) { unlink(p); }
+static void test_rmdir(const char* p) {
+    char cmd[512]; snprintf(cmd, sizeof(cmd), "rm -rf %s", p); system(cmd);
+}
+
 /* ── helpers ── */
 
 static int count_rows(sqlite3* db, const char* tbl, const char* where, uint64_t val) {
@@ -297,6 +311,6 @@ done:
     if (g_a) { g_a->running = 0; utun_instance_destroy(g_a); g_a = NULL; }
     if (g_b) { g_b->running = 0; utun_instance_destroy(g_b); g_b = NULL; }
     if (g_ua) { uasync_destroy(g_ua, 0); g_ua = NULL; }
-    { char cmd[512]; snprintf(cmd, sizeof(cmd), "rm -rf %s", g_tdir); system(cmd); }
+    test_rmdir(g_tdir);
     return g_failed > 0 ? 1 : 0;
 }