diff --git a/test/test_arraylist.c b/test/test_arraylist.c
index f27c232..dbf9fbf 100644
--- a/test/test_arraylist.c
+++ b/test/test_arraylist.c
@@ -901,6 +901,63 @@ static void test_clear_non_empty_array(void **state) {
     arraylist_destroy(&arr);
 }
 
+//Resize
+static void test_resize_increase_capacity(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    assert_uint_equal(arraylist_resize(arr, 128), ARRLIST_OK);
+    assert_uint_equal(arraylist_capacity(arr), 128);
+    
+    arraylist_destroy(&arr);
+}
+
+static void test_resize_decrease_capacity(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    assert_uint_equal(arraylist_resize(arr, 32), ARRLIST_OK);
+    assert_uint_equal(arraylist_capacity(arr), 32);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_resize_to_zero(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    assert_uint_equal(arraylist_resize(arr, 0), ARRLIST_INVALID_CAPACITY);
+    assert_uint_equal(arraylist_capacity(arr), 64);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_resize_to_size_max(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    assert_uint_equal(arraylist_resize(arr, SIZE_MAX), ARRLIST_ALLOC_OVERFLOW);
+    assert_uint_equal(arraylist_capacity(arr), 64);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_resize_null_array(void **state) {
+    (void) state;
+
+    ArrayList *arr = NULL;
+
+    assert_uint_equal(arraylist_resize(arr, 65), ARRLIST_NULL_ARG);
+}
+
 static void test_clear_already_empty_array(void **state) {
     (void) state;
 
@@ -1017,6 +1074,14 @@ int main(void) {
         cmocka_unit_test(test_clear_null_array),
     };
 
+    const struct CMUnitTest resize[] = {
+        cmocka_unit_test(test_resize_increase_capacity),
+        cmocka_unit_test(test_resize_decrease_capacity),
+        cmocka_unit_test(test_resize_to_zero),
+        cmocka_unit_test(test_resize_to_size_max),
+        cmocka_unit_test(test_resize_null_array),
+    };
+
     int rc = 0;
 
     rc += cmocka_run_group_tests(init, NULL, NULL);
@@ -1031,6 +1096,7 @@ int main(void) {
     rc += cmocka_run_group_tests(get, NULL, NULL);
     rc += cmocka_run_group_tests(set, NULL, NULL);
     rc += cmocka_run_group_tests(clear, NULL, NULL);
+    rc += cmocka_run_group_tests(resize, NULL, NULL);
 
     return rc;
 }