diff -r bb196054f3fd -r 84fc42b04d3b tests/test_list.c
--- a/tests/test_list.c	Mon Dec 02 20:58:17 2024 +0100
+++ b/tests/test_list.c	Thu Dec 05 01:51:47 2024 +0100
@@ -142,6 +142,25 @@
     free(arr);
 }
 
+CX_TEST(test_array_reserve) {
+    CX_ARRAY_DECLARE_SIZED(int, arr, uint16_t);
+    cx_array_initialize(arr, 16);
+    arr_size = 5;
+    int result;
+    CX_TEST_DO {
+        result = cx_array_simple_reserve(arr, 3);
+        CX_TEST_ASSERT(result == 0);
+        CX_TEST_ASSERT(arr_size == 5);
+        CX_TEST_ASSERT(arr_capacity == 16);
+
+        result = cx_array_simple_reserve(arr, 20);
+        CX_TEST_ASSERT(result == 0);
+        CX_TEST_ASSERT(arr_size == 5);
+        CX_TEST_ASSERT(arr_capacity >= 25);
+    }
+    free(arr);
+}
+
 CX_TEST(test_array_insert_sorted) {
     int d1 = 50;
     int d2 = 80;
@@ -1879,6 +1898,7 @@
     cx_test_register(suite, test_array_add);
     cx_test_register(suite, test_array_add8);
     cx_test_register(suite, test_array_copy_unsupported_width);
+    cx_test_register(suite, test_array_reserve);
     cx_test_register(suite, test_array_insert_sorted);
     cx_test_register(suite, test_array_binary_search);