diff --git a/src/_pytask/_hashlib.py b/src/_pytask/_hashlib.py
index d40a2d59..a3c4edcf 100644
--- a/src/_pytask/_hashlib.py
+++ b/src/_pytask/_hashlib.py
@@ -225,13 +225,6 @@ def hash_value(value: Any) -> int | str:
     """
     if value is None:
         return 0xFCA86420
-    if hasattr(value, "_asdict"):
-        value = value._asdict()
-    if isinstance(value, dict):
-        value = "".join(
-            "".join((str(hash_value(k)), str(hash_value(value[k]))))
-            for k in sorted(value)
-        )
     if isinstance(value, (tuple, list)):
         value = "".join(str(hash_value(i)) for i in value)
     if isinstance(value, Path):
diff --git a/src/_pytask/nodes.py b/src/_pytask/nodes.py
index 98509443..a296fd47 100644
--- a/src/_pytask/nodes.py
+++ b/src/_pytask/nodes.py
@@ -237,12 +237,14 @@ class PythonNode(PNode):
     @property
     def signature(self) -> str:
         """The unique signature of the node."""
-        if self.node_info:
-            dict_ = self.node_info._asdict()
-            dict_.pop("value", None)
-            raw_key = str(hash_value(dict_))
-        else:
-            raw_key = str(hash_value(self.node_info))
+        raw_key = (
+            "".join(
+                str(hash_value(getattr(self.node_info, name)))
+                for name in ("arg_name", "path", "task_name", "task_path")
+            )
+            if self.node_info
+            else str(hash_value(self.node_info))
+        )
         return hashlib.sha256(raw_key.encode()).hexdigest()
 
     def load(self, is_product: bool = False) -> Any:
diff --git a/tests/test_nodes.py b/tests/test_nodes.py
index f6e2dbe2..b396e326 100644
--- a/tests/test_nodes.py
+++ b/tests/test_nodes.py
@@ -54,7 +54,7 @@ def test_hash_of_python_node(value, hash_, expected):
                     task_name="task_example",
                 ),
             ),
-            "17b24b0e3141135172b02c8d898d0337ea79bea0f56b6272d18b6bb8e75f985f",
+            "7284475a87b8f1aa49c40126c5064269f0ba926265b8fe9158a39a882c6a1512",
         ),
         (
             Task(base_name="task", path=Path("task.py"), function=None),