diff --git a/TODO.md b/TODO.md
index 7e9f358..b864360 100644
--- a/TODO.md
+++ b/TODO.md
@@ -5,7 +5,7 @@
 - [ ] Tests for the server module
 
 # Development plans
-
+- [ ] make print_log to write a file log
 - [ ] Remove file when error while saving the data in DB
 - [ ] Colorize server messages
 
diff --git a/src/components/server/server.c b/src/components/server/server.c
index 4d97533..9355172 100644
--- a/src/components/server/server.c
+++ b/src/components/server/server.c
@@ -1,23 +1,24 @@
 /* SPDX-License-Identifier: MIT */
 /* Copyright (c) 2026 Oleksandr Zhylin */
 
-#include <db.h>
-#include <file_p.h>
-#include <main.h>
-#include <session.h>
-#include <utils.h>
 #include <arpa/inet.h>
+#include <db.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <file_p.h>
+#include <main.h>
 #include <netinet/in.h>
+#include <session.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/mman.h>
 #include <sys/select.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <utils.h>
 
 volatile sig_atomic_t shutdown_requested = 0;
 volatile sig_atomic_t signal_received = 0;
@@ -78,7 +79,7 @@ void server_main_loop(server_data_t *s_d) {
     }
 
     if (sr == -1) {
-      perror("select");
+      print_log(stderr, pl_error, "select: %s", strerror(errno));
       exit(6);
     }
 
@@ -119,7 +120,8 @@ void server_main_loop(server_data_t *s_d) {
 char *get_welcome_mes(void) {
   int fd = open(WELCOME_FILE_NAME, O_RDONLY);
   if (fd == -1) {
-    perror(WELCOME_FILE_NAME);
+    print_log(stderr, pl_fatal, "starting, welcome file \"%s\": %s\n",
+              WELCOME_FILE_NAME, strerror(errno));
     exit(7);
   }
   int filesize = lseek(fd, 0, SEEK_END) + 1;
@@ -127,7 +129,8 @@ char *get_welcome_mes(void) {
   char *welcome_message =
       mmap(NULL, filesize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
   if (welcome_message == MAP_FAILED) {
-    perror(WELCOME_FILE_NAME);
+    print_log(stderr, pl_fatal, "starting, welcome file \"%s\": %s\n",
+              WELCOME_FILE_NAME, strerror(errno));
     close(fd);
     exit(5);
   }
@@ -150,13 +153,14 @@ int start_server(void) {
 
   res = bind(ls, (struct sockaddr *)&s_addr, sizeof(s_addr));
   if (res == -1) {
-    perror("bind");
+    print_log(stderr, pl_fatal, "starting, socket bind: %s\n", strerror(errno));
     exit(3);
   }
 
   res = listen(ls, LISTEN_QLEN);
   if (res == -1) {
-    perror("listen");
+    print_log(stderr, pl_fatal, "starting, socket listen: %s\n",
+              strerror(errno));
     exit(4);
   }
   return ls;
@@ -169,7 +173,7 @@ void prepare_start(int argc, char *argv[]) {
   }
 
   if (-1 == chdir(argv[1])) {
-    perror(argv[1]);
+    print_log(stderr, pl_fatal, "chdir: \"%s\" %s\n", argv[1], strerror(errno));
     exit(2);
   }
 
diff --git a/src/components/utils/utils.c b/src/components/utils/utils.c
index 97a1892..0a40fd6 100644
--- a/src/components/utils/utils.c
+++ b/src/components/utils/utils.c
@@ -32,7 +32,7 @@ int print_log(FILE *output, enum pl_type type, const char *format_message,
   char *uf_str = malloc(strlen(date_preffix) + 16 + strlen(format_message) + 4);
   sprintf(uf_str, uff_str, date_preffix, format_message);
   va_start(args, format_message);
-  ret = vfprintf(stdout, uf_str, args);
+  ret = vfprintf(output, uf_str, args);
   va_end(args);
   return ret;
 }
\ No newline at end of file
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 46f4484..3573a09 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -2,4 +2,5 @@ add_subdirectory(session)
 add_subdirectory(user)
 add_subdirectory(file_p)
 add_subdirectory(test_utils)
-add_subdirectory(client)
\ No newline at end of file
+add_subdirectory(client)
+add_subdirectory(server)
\ No newline at end of file
diff --git a/test/server/CMakeLists.txt b/test/server/CMakeLists.txt
new file mode 100644
index 0000000..b159f32
--- /dev/null
+++ b/test/server/CMakeLists.txt
@@ -0,0 +1,19 @@
+# ---/ start_server /--------------------------------------------------
+
+add_executable(start_server
+    start_server.c
+)
+
+target_link_libraries(start_server
+    cmocka
+    client
+    file_p
+    session
+    utils
+    main
+    test_utils
+)
+
+target_link_options(start_server PRIVATE -Wl,--wrap=socket,--wrap=setsockopt,--wrap=bind,--wrap=listen,--wrap=exit)
+
+add_test(NAME client_start_server_test_1 COMMAND start_server)
\ No newline at end of file
diff --git a/test/server/start_server.c b/test/server/start_server.c
new file mode 100644
index 0000000..4dcf867
--- /dev/null
+++ b/test/server/start_server.c
@@ -0,0 +1,41 @@
+#include <cmocka.h>
+#include <db/db.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <sys/socket.h>
+
+#include <client.h>
+#include <file_p.h>
+#include <main.h>
+
+/* TODO: finish */
+
+int  __wrap_socket(int __domain, int __type, int __protocol) { return 0; }
+
+int  __wrap_setsockopt(int __fd, int __level, int __optname,
+                      const void *__optval, socklen_t __optlen) {
+  return 0;
+}
+
+int  __wrap_bind(int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len) {
+  return 0;
+}
+
+int  __wrap_listen(int __fd, int __n) { return 0; }
+
+void __wrap_exit(int __status) {}
+
+void test__start_server_success(void **state) {}
+
+int setup(void **state) { return 0; }
+int tear_down(void **state) { return 0; }
+
+int main(int argc, char **argv) {
+  const struct CMUnitTest tests[] = {
+      cmocka_unit_test(test__start_server_success),
+  };
+
+  return cmocka_run_group_tests(tests, setup, tear_down);
+}