diff -r c9d008861178 -r 7340c4255f1f tests/test_list.cpp
--- a/tests/test_list.cpp	Wed Feb 08 20:26:26 2023 +0100
+++ b/tests/test_list.cpp	Wed Feb 15 16:48:11 2023 +0100
@@ -735,13 +735,13 @@
         result = cxListSwap(list, 16, 17);
         EXPECT_NE(0, result);
 
-        auto iter = cxListBegin(list);
+        auto iter = cxListIterator(list);
         cx_foreach(int*, e, iter) {
             EXPECT_EQ(*e, swapped[iter.index]);
         }
-        // TODO: replace with backward iterator
-        cx_for_n(i, 16) {
-            EXPECT_EQ(*((int *) cxListAt(list, i)), swapped[i]);
+        iter = cxListBackwardsIterator(list);
+        cx_foreach(int*, e, iter) {
+            EXPECT_EQ(*e, swapped[iter.index]);
         }
     }
 
@@ -777,16 +777,44 @@
     }
 
     void verifyIterator(CxList *list) const {
-        int i = 0;
-        auto iter = cxListBeginMut(list);
+        auto iter = cxListIterator(list);
+        size_t i = 0;
         cx_foreach(int*, x, iter) {
-            ASSERT_EQ(iter.index, (size_t) (i + 1) / 2);
-            ASSERT_EQ(*x, testdata.data[i]);
-            if (i % 2 == 1) cxIteratorFlagRemoval(iter);
+            ASSERT_EQ(i, iter.index);
+            EXPECT_EQ(*x, testdata.data[iter.index]);
             i++;
         }
+        ASSERT_EQ(i, list->size);
+        iter = cxListBackwardsIterator(list);
+        cx_foreach(int*, x, iter) {
+            ASSERT_EQ(i - 1, iter.index);
+            EXPECT_EQ(*x, testdata.data[iter.index]);
+            i--;
+        }
+        ASSERT_EQ(i, 0);
         auto len = testdata_len;
-        EXPECT_EQ(i, len);
+        i = len / 2;
+        auto mut_iter = cxListMutIteratorAt(list, i);
+        size_t j = 0;
+        cx_foreach(int*, x, mut_iter) {
+            ASSERT_EQ(mut_iter.index, len / 2 + j / 2);
+            ASSERT_EQ(*x, testdata.data[i]);
+            if (i % 2 == 1) cxIteratorFlagRemoval(mut_iter);
+            i++;
+            j++;
+        }
+        ASSERT_EQ(i, len);
+        i = len / 2;
+        j = 0;
+        mut_iter = cxListMutBackwardsIteratorAt(list, i - 1);
+        cx_foreach(int*, x, mut_iter) {
+            ASSERT_EQ(mut_iter.index, len / 2 - 1 - j);
+            ASSERT_EQ(*x, testdata.data[i - 1]);
+            if (i % 2 == 0) cxIteratorFlagRemoval(mut_iter);
+            i--;
+            j++;
+        }
+        ASSERT_EQ(i, 0);
         ASSERT_EQ(list->size, len / 2);
         cx_for_n(j, len / 2) ASSERT_EQ(*(int *) cxListAt(list, j), testdata.data[j * 2]);
     }
@@ -794,7 +822,7 @@
     static void verifyInsertViaIterator(CxList *list) {
         int newdata[] = {10, 20, 30, 40, 50};
 
-        auto iter = cxListMutIterator(list, 2);
+        auto iter = cxListMutIteratorAt(list, 2);
         EXPECT_TRUE(cxIteratorValid(iter));
         EXPECT_EQ(iter.index, 2);
         EXPECT_EQ(*(int *) cxIteratorCurrent(iter), 2);
@@ -807,16 +835,16 @@
         EXPECT_EQ(iter.index, 3);
         EXPECT_EQ(*(int *) cxIteratorCurrent(iter), 2);
 
-        iter = cxListBeginMut(list);
+        iter = cxListMutIterator(list);
         cxListInsertBefore(&iter, &newdata[2]);
         EXPECT_TRUE(cxIteratorValid(iter));
         EXPECT_EQ(iter.index, 1);
         EXPECT_EQ(*(int *) cxIteratorCurrent(iter), 0);
-        iter = cxListMutIterator(list, list->size);
+        iter = cxListMutIteratorAt(list, list->size);
         cxListInsertBefore(&iter, &newdata[3]);
         EXPECT_FALSE(cxIteratorValid(iter));
         EXPECT_EQ(iter.index, 9);
-        iter = cxListMutIterator(list, list->size);
+        iter = cxListMutIteratorAt(list, list->size);
         cxListInsertAfter(&iter, &newdata[4]);
         EXPECT_FALSE(cxIteratorValid(iter));
         EXPECT_EQ(iter.index, 10);