diff --git a/tests/unittests/torture_list.c b/tests/unittests/torture_list.c
index 0555218f..663c5516 100644
--- a/tests/unittests/torture_list.c
+++ b/tests/unittests/torture_list.c
@@ -33,16 +33,32 @@ static void torture_ssh_list_append(void **state) {
 
     rc = ssh_list_append(xlist, "item1");
     assert_true(rc == 0);
+    assert_non_null(xlist->root);
+    assert_non_null(xlist->root->data);
+    assert_non_null(xlist->end);
+    assert_non_null(xlist->end->data);
     assert_string_equal((const char *) xlist->root->data, "item1");
     assert_string_equal((const char *) xlist->end->data, "item1");
 
     rc = ssh_list_append(xlist, "item2");
     assert_true(rc == 0);
+    assert_non_null(xlist->root);
+    assert_non_null(xlist->root->data);
+    assert_non_null(xlist->end);
+    assert_non_null(xlist->end->data);
     assert_string_equal((const char *) xlist->root->data, "item1");
     assert_string_equal((const char *) xlist->end->data, "item2");
 
     rc = ssh_list_append(xlist, "item3");
     assert_true(rc == 0);
+    assert_non_null(xlist->root);
+    assert_non_null(xlist->root->data);
+    assert_non_null(xlist->root->next);
+    assert_non_null(xlist->root->next->data);
+    assert_non_null(xlist->root->next->next);
+    assert_non_null(xlist->root->next->next->data);
+    assert_non_null(xlist->end);
+    assert_non_null(xlist->end->data);
     assert_string_equal((const char *) xlist->root->data, "item1");
     assert_string_equal((const char *) xlist->root->next->data, "item2");
     assert_string_equal((const char *) xlist->root->next->next->data, "item3");
@@ -64,16 +80,31 @@ static void torture_ssh_list_prepend(void **state) {
 
     rc = ssh_list_prepend(xlist, "item1");
     assert_true(rc == 0);
+    assert_non_null(xlist->root);
+    assert_non_null(xlist->root->data);
+    assert_non_null(xlist->end);
+    assert_non_null(xlist->end->data);
     assert_string_equal((const char *) xlist->root->data, "item1");
     assert_string_equal((const char *) xlist->end->data, "item1");
 
     rc = ssh_list_append(xlist, "item2");
     assert_true(rc == 0);
+    assert_non_null(xlist->root);
+    assert_non_null(xlist->root->data);
+    assert_non_null(xlist->end);
+    assert_non_null(xlist->end->data);
     assert_string_equal((const char *) xlist->root->data, "item1");
     assert_string_equal((const char *) xlist->end->data, "item2");
 
     rc = ssh_list_prepend(xlist, "item3");
     assert_true(rc == 0);
+    assert_non_null(xlist->root);
+    assert_non_null(xlist->root->data);
+    assert_non_null(xlist->root->next);
+    assert_non_null(xlist->root->next->data);
+    assert_non_null(xlist->root->next->next);
+    assert_non_null(xlist->end);
+    assert_non_null(xlist->end->data);
     assert_string_equal((const char *) xlist->root->data, "item3");
     assert_string_equal((const char *) xlist->root->next->data, "item1");
     assert_string_equal((const char *) xlist->root->next->next->data, "item2");