diff --git a/src/hooked_containers/mapping.py b/src/hooked_containers/mapping.py
index dc669c6..e19ce6b 100644
--- a/src/hooked_containers/mapping.py
+++ b/src/hooked_containers/mapping.py
@@ -35,7 +35,7 @@ class HookedMapping(HookedContainer[T], MutableMapping[T, MutableNesting[T]]):
     def insert(self, key: T, value: MutableNesting[T]) -> None:
         self._data[key] = value
         if self.hook:
-            self.hook(e.AddItemEvent(value, path=self.new_path(key)))
+            self.hook(e.AddItemEvent(self.new_path(key), value))
 
     # HookedContainer methods
 
@@ -58,10 +58,10 @@ class HookedMapping(HookedContainer[T], MutableMapping[T, MutableNesting[T]]):
         else:
             self._data[key] = value
             if self.hook:
-                self.hook(e.SetItemEvent(value, path=self.new_path(key)))
+                self.hook(e.SetItemEvent(self.new_path(key), value))
 
     def __delitem__(self, key: T) -> None:
         item = self._data[key]
         del self._data[key]
         if self.hook:
-            self.hook(e.RemoveItemEvent(item, path=self.new_path(key)))
+            self.hook(e.RemoveItemEvent(self.new_path(key), item))
diff --git a/tests/test_mapping.py b/tests/test_mapping.py
index e05b798..08f66fe 100644
--- a/tests/test_mapping.py
+++ b/tests/test_mapping.py
@@ -24,9 +24,18 @@ class TestHookedMapping:
 
     class TestMappingOps:
         def test_setitem(self):
-            m = HookedMapping({})
+            added = []
+            m = HookedMapping({}, lambda e: added.append(e.item))
             m["a"] = 1
             assert m._data == {"a": 1}
+            assert added == [1]
+
+        def test_nested_setitem(self):
+            added = []
+            m = HookedMapping({"a": {}}, lambda e: added.append(e.item))
+            m["a"]["x"] = 1
+            assert m._data == {"a": {"x": 1}}
+            assert added == [1]
 
         def test_getitem(self):
             m = HookedMapping({"a": 1})