--- a/test/test_list.c	Mon Dec 20 11:26:39 2021 +0100
+++ b/test/test_list.c	Mon Dec 20 11:58:36 2021 +0100
@@ -225,8 +225,6 @@
 }
 
 void test_linked_list_first(void) {
-    CU_ASSERT_PTR_NULL(cx_linked_list_first(NULL, 0))
-
     struct node {
         int data;
         void *prev;
@@ -243,8 +241,6 @@
 }
 
 void test_linked_list_last(void) {
-    CU_ASSERT_PTR_NULL(cx_linked_list_last(NULL, 0))
-
     struct node {
         int data;
         void *next;