diff --git a/src/list.c b/src/list.c
index 4c3929c..9e4d348 100644
--- a/src/list.c
+++ b/src/list.c
@@ -216,18 +216,12 @@ struct _list* list_slice(struct _list *self, int start, int end, int step)
     {
         start += self->size(self);
     }
-
     if(end < 0)
     {
         end += self->size(self);
     }
-
-    if(start > self->size(self) || end > self->size(self))
-    {
-        return NULL;
-    }
-
-    list_t list = list_new2(self->_obj_size, end - start);
+    uint32_t capicity = (end - start == 0) ? 1 : end - start;
+    list_t list = list_new2(self->_obj_size, capicity);
     if(list == NULL)
     {
         return NULL;
@@ -235,47 +229,42 @@ struct _list* list_slice(struct _list *self, int start, int end, int step)
     list->compare = self->compare;
     list->print_obj = self->print_obj;
 
+    if(capicity == 0)
+    {
+        goto done;
+    }
+
+    if(start > self->size(self) || end > self->size(self))
+    {
+        return list;
+    }
+
     if(step > 0)
     {
         if(start >= end)
         {
-            return NULL;
+            goto done;
         }
 
         for(int i = start; i < end; i += step)
         {
-            if(i >= self->size(self))
-            {
-                break;
-            }
             list->append(list, (char*)self->obj + i * self->_obj_size);
         }
     }
     else
     {
-        uint32_t temp = 0;
         if(start <= end)
         {
-            return NULL;
+            goto done;
         }
-        // start ^= end;
-        // end ^= start;
-        // start ^= end;
-        temp = start;
-        start = end;
-        end = temp;
-        step = -step;
 
-        for(int i = start; i < end; i += step)
+        for(int i = start; i > end; i += step)
         {
-            if(i >= self->size(self))
-            {
-                break;
-            }
-            list->insert(list, 0, (char*)self->obj + i * self->_obj_size);
+            list->append(list, (char*)self->obj + i * self->_obj_size);
         }
     }
 
+done:
     return list;
 }
 
diff --git a/test/test_list.c b/test/test_list.c
index 6be19b1..f338ecc 100644
--- a/test/test_list.c
+++ b/test/test_list.c
@@ -448,11 +448,11 @@ static void test_list_slice(void)
     TEST_ASSERT_TRUE(list2->empty(list2));
 
     list2 = list->slice(list, 1, 5, -1); // if start < end && step < 0
-    TEST_ASSERT_NULL(list2);
+    TEST_ASSERT_NOT_NULL(list2);
     TEST_ASSERT_TRUE(list2->empty(list2));
 
     list2 = list->slice(list, 5, 1, 1); // if start > end && step > 0
-    TEST_ASSERT_NULL(list2);
+    TEST_ASSERT_NOT_NULL(list2);
     TEST_ASSERT_TRUE(list2->empty(list2));
 
     // python: list[0:]
@@ -488,7 +488,7 @@ static void test_list_slice(void)
     TEST_ASSERT_EQUAL_INT(data[len - 1], temp);
     list_free(&list2);
 
-    // python: list[-5:8:1]
+    // python: list[-6:8] or list[-6:-2]
     // list2 = list->slice(list, -6, 8, 1);   // It can be executed, but it's not intuitive
     list2 = list->slice(list, -6, -2, 1);
     TEST_ASSERT_NOT_NULL(list2);
@@ -501,20 +501,18 @@ static void test_list_slice(void)
     }
     list_free(&list2);
 
-    // python: list[-6:0:-1] or list[4:0:-1]
-    // list2 = list->slice(list, -6, 0, -1);   // It can be executed, but it's not intuitive
+    // python: list[4::-1]
     list2 = list->slice(list, 4, 0, -1);
     TEST_ASSERT_NOT_NULL(list2);
     list2->print(list2); printf("\n");
-    TEST_ASSERT_EQUAL_INT(4, list2->size(list2));
+    TEST_ASSERT_EQUAL_INT(5, list2->size(list2));
     for(i = 0; i < list2->size(list2); i++)
     {
         TEST_ASSERT_TRUE(list2->get(list2, i, &temp));
-        TEST_ASSERT_EQUAL_INT(data[list2->size(list2) - 1 - i], temp);
+        TEST_ASSERT_EQUAL_INT(data[list2->size(list2) - i], temp);
     }
     list_free(&list2);
 
-
     list_free(&list);
 }