diff --git a/tests/unit/utils/vars.c b/tests/unit/utils/vars.c
new file mode 100644
index 0000000..73784cf
--- /dev/null
+++ b/tests/unit/utils/vars.c
@@ -0,0 +1,85 @@
+#define _POSIX_C_SOURCE 200809L
+#include "../../../src/utils/vars/vars.h"
+
+#include <criterion/criterion.h>
+#include <criterion/new/assert.h>
+#include <criterion/redirect.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "../../../src/utils/hash_map/hash_map.h"
+#include "../../../src/utils/string_utils/string_utils.h"
+
+TestSuite(utils_vars);
+
+Test(utils_vars, init_free)
+{
+    struct hash_map *map = vars_init();
+    cr_expect_not_null(map);
+    hash_map_free(&map);
+}
+
+Test(utils_vars, get_defaults)
+{
+    struct hash_map *map = vars_init();
+    cr_expect_not_null(map);
+    cr_assert_str_eq(get_var(map, "?"), "0");
+    char int_str[11];
+    int_to_str((int)getpid(), int_str);
+    cr_assert_str_eq(get_var(map, "$"), int_str);
+    int_to_str((int)getuid(), int_str);
+    cr_assert_str_eq(get_var(map, "UID"), int_str);
+
+    hash_map_free(&map);
+}
+
+Test(utils_vars, set_vars)
+{
+    struct hash_map *map = vars_init();
+    cr_expect_not_null(map);
+    set_var_copy(map, "key1", "value1");
+    cr_assert_str_eq(get_var(map, "key1"), "value1");
+    set_var_copy(map, "key2", "value2");
+    cr_assert_str_eq(get_var(map, "key2"), "value2");
+
+    hash_map_free(&map);
+}
+
+Test(utils_vars, get_env_vars)
+{
+    struct hash_map *map = vars_init();
+    cr_expect_not_null(map);
+    cr_assert_eq(get_var_or_env(map, "ENV_TEST"), NULL);
+    setenv("ENV_TEST", "value1", 0);
+    cr_assert_str_eq(get_var_or_env(map, "ENV_TEST"), "value1");
+    setenv("ENV_TEST", "value2", 1);
+    cr_assert_str_eq(get_var_or_env(map, "ENV_TEST"), "value2");
+
+    hash_map_free(&map);
+}
+
+Test(utils_vars, set_vars_update)
+{
+    struct hash_map *map = vars_init();
+    cr_expect_not_null(map);
+    set_var_copy(map, "key", "value1");
+    cr_assert_str_eq(get_var(map, "key"), "value1");
+    set_var_copy(map, "key", "value2");
+    cr_assert_str_eq(get_var(map, "key"), "value2");
+
+    hash_map_free(&map);
+}
+
+Test(utils_vars, set_vars_int)
+{
+    struct hash_map *map = vars_init();
+    cr_expect_not_null(map);
+    set_var_int(map, "key1", 100);
+    cr_assert_str_eq(get_var(map, "key1"), "100");
+    set_var_int(map, "key1", 200);
+    cr_assert_str_eq(get_var(map, "key1"), "200");
+    set_var_int(map, "key2", 10);
+    cr_assert_str_eq(get_var(map, "key2"), "10");
+
+    hash_map_free(&map);
+}