diff --git a/tests/core/utilities/test_abi.py b/tests/core/utilities/test_abi.py
index baebbec247..339a5563f2 100644
--- a/tests/core/utilities/test_abi.py
+++ b/tests/core/utilities/test_abi.py
@@ -262,7 +262,7 @@ def test_get_tuple_type_str_parts(
 def test_abi_data_tree(
     types: List[str], data: Tuple[List[bool], bytes], expected: List[Any]
 ) -> None:
-    assert abi_data_tree(types, data) == expected
+    assert list(abi_data_tree(types, data)) == expected
 
 
 @pytest.mark.parametrize(
diff --git a/web3/_utils/abi.py b/web3/_utils/abi.py
index df4902635b..54d35803e9 100644
--- a/web3/_utils/abi.py
+++ b/web3/_utils/abi.py
@@ -618,13 +618,12 @@ def normalizer(datatype, data):
         *map(data_tree_map, normalizers),
         # 3. Stripping the types back out of the tree
         strip_abi_types,
+        list,
     )
 
 
 @curry
-def abi_data_tree(
-    types: Iterable[TypeStr], data: Iterable[Any]
-) -> List["ABITypedData"]:
+def abi_data_tree(types: Iterable[TypeStr], data: Iterable[Any]) -> "map[ABITypedData]":
     """
     Decorate the data tree with pairs of (type, data). The pair tuple is actually an
     ABITypedData, but can be accessed as a tuple.
@@ -634,7 +633,7 @@ def abi_data_tree(
     >>> abi_data_tree(types=["bool[2]", "uint"], data=[[True, False], 0])
     [("bool[2]", [("bool", True), ("bool", False)]), ("uint256", 0)]
     """
-    return list(map(abi_sub_tree, types, data))
+    return map(abi_sub_tree, types, data)
 
 
 @curry
@@ -929,6 +928,8 @@ async def async_map_if_collection(
     If the value is not a collection, return it unmodified.
     """
     datatype = type(value)
+    if datatype is map:
+        return [await func(item) for item in value]
     if isinstance(value, Mapping):
         return datatype({key: await func(val) for key, val in value.values()})
     if is_string(value):
diff --git a/web3/_utils/formatters.py b/web3/_utils/formatters.py
index c01fcb8d7f..d886aad8d8 100644
--- a/web3/_utils/formatters.py
+++ b/web3/_utils/formatters.py
@@ -65,6 +65,8 @@ def map_collection(func: Callable[..., TReturn], collection: Any) -> Any:
     If the value is not a collection, return it unmodified
     """
     datatype = type(collection)
+    if datatype is map:
+        return map(func, collection)
     if isinstance(collection, Mapping):
         return datatype((key, func(val)) for key, val in collection.items())
     if is_string(collection):