diff --git a/doc/changelog.rst b/doc/changelog.rst
index a498a1d..9b31878 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -4,6 +4,10 @@ Changelog
 [0.2.7] - Unreleased
 --------------------
 
+Fixed
+^^^^^
+- Fix ``ref``/``value`` consistency for nested complex attributes like ``Manager``. :pr:`47`
+
 Added
 ^^^^^
 - Attribute filtering compliance checkers for ``attributes`` and ``excludedAttributes`` on single resource, list, and ``.search`` endpoints (:rfc:`7644` §3.4). :issue:`20`
diff --git a/scim2_tester/filling.py b/scim2_tester/filling.py
index beb0e2d..8e5a29a 100644
--- a/scim2_tester/filling.py
+++ b/scim2_tester/filling.py
@@ -7,6 +7,7 @@
 from typing import Any
 
 from pydantic import Base64Bytes
+from pydantic import BaseModel
 from scim2_models import ComplexAttribute
 from scim2_models import Extension
 from scim2_models import Mutability
@@ -134,7 +135,7 @@ def generate_random_value(
     if path.is_multivalued:
         value = [value]
 
-    return fix_reference_values_in_value(value)
+    return value
 
 
 def fill_with_random_values(
@@ -174,33 +175,37 @@ def fill_with_random_values(
             path.set(obj, value, strict=False)
 
     fix_primary_attributes(obj)
+    fix_reference_values(obj)
 
     return obj
 
 
-def fix_reference_values_in_value(value: Any) -> Any:
-    """Fix reference values in any value to extract IDs from reference URLs.
+def fix_reference_values(obj: BaseModel) -> None:
+    """Recursively fix ref/value consistency on an object and its children.
 
-    For SCIM reference fields, correctly sets the value field to match
-    the ID extracted from the reference URL. Works with both single values
-    and lists containing reference objects.
+    Walks the object tree and ensures that for any object with both
+    ``ref`` and ``value`` attributes, ``value`` matches the last segment
+    of the ``ref`` URL.
     """
-    if isinstance(value, list):
-        for item in value:
-            if (
-                hasattr(item, "ref")
-                and hasattr(item, "value")
-                and getattr(item, "ref", None)
-            ):
-                item.value = item.ref.rsplit("/", 1)[-1]
-    elif (
-        hasattr(value, "ref")
-        and hasattr(value, "value")
-        and getattr(value, "ref", None)
-    ):
-        value.value = value.ref.rsplit("/", 1)[-1]
+    for field_name in type(obj).model_fields:
+        child = getattr(obj, field_name, None)
+        if child is None:
+            continue
 
-    return value
+        if isinstance(child, list):
+            for item in child:
+                _fix_ref_value(item)
+                if isinstance(item, BaseModel):
+                    fix_reference_values(item)
+        elif isinstance(child, BaseModel):
+            _fix_ref_value(child)
+            fix_reference_values(child)
+
+
+def _fix_ref_value(obj: Any) -> None:
+    """Set ``value`` to the last segment of ``ref`` if both attributes exist."""
+    if hasattr(obj, "ref") and hasattr(obj, "value") and getattr(obj, "ref", None):
+        obj.value = obj.ref.rsplit("/", 1)[-1]
 
 
 def fix_primary_attributes(obj: Resource[Any]) -> None:
diff --git a/tests/test_filling.py b/tests/test_filling.py
index ae30e20..a0634e9 100644
--- a/tests/test_filling.py
+++ b/tests/test_filling.py
@@ -17,8 +17,10 @@
 from scim2_models.resources.resource import Resource
 from scim2_models.resources.user import X509Certificate
 
+from scim2_tester.filling import _fix_ref_value
 from scim2_tester.filling import fill_with_random_values
 from scim2_tester.filling import fix_primary_attributes
+from scim2_tester.filling import fix_reference_values
 from scim2_tester.filling import generate_random_value
 from scim2_tester.filling import get_model_from_ref_type
 from scim2_tester.filling import get_random_example_value
@@ -282,3 +284,68 @@ def test_generate_random_value_required_filter(testing_context):
         testing_context, Path[User]("userName"), required=[Required.true]
     )
     assert result
+
+
+def test_fix_reference_values_in_nested_complex_attribute(testing_context, httpserver):
+    """Ensures ref and value are consistent for nested complex attributes like Manager."""
+    user_data = {
+        "schemas": ["urn:ietf:params:scim:schemas:core:2.0:User"],
+        "id": "manager-id",
+        "userName": "manager-user",
+        "meta": {
+            "resourceType": "User",
+            "location": f"http://localhost:{httpserver.port}/Users/manager-id",
+        },
+    }
+    httpserver.expect_request("/Users", method="POST").respond_with_json(
+        user_data, status=201
+    )
+
+    manager_urn = "urn:ietf:params:scim:schemas:extension:enterprise:2.0:User:manager"
+    enterprise_user = User[EnterpriseUser](user_name="test")
+    filled = fill_with_random_values(
+        testing_context,
+        enterprise_user,
+        [
+            Path[User[EnterpriseUser]](manager_urn),
+            Path[User[EnterpriseUser]](f"{manager_urn}.value"),
+            Path[User[EnterpriseUser]](f"{manager_urn}.ref"),
+        ],
+    )
+
+    manager = filled[EnterpriseUser].manager
+    assert manager is not None
+    assert manager.ref is not None
+    assert manager.value == manager.ref.rsplit("/", 1)[-1]
+
+
+def test_fix_ref_value_on_object_with_ref_and_value():
+    """Ensures _fix_ref_value corrects value from ref URL."""
+    from scim2_models.resources.enterprise_user import Manager
+
+    manager = Manager(
+        ref="http://example.com/Users/abc123",
+        value="wrong-value",
+    )
+    _fix_ref_value(manager)
+
+    assert manager.value == "abc123"
+
+
+def test_fix_reference_values_on_list_of_members():
+    """Ensures fix_reference_values fixes ref/value in list attributes."""
+    group = Group(display_name="test")
+    group.members = [
+        Group.Members(
+            ref="http://example.com/Users/user1",
+            value="wrong",
+        ),
+        Group.Members(
+            ref="http://example.com/Groups/group2",
+            value="wrong",
+        ),
+    ]
+    fix_reference_values(group)
+
+    assert group.members[0].value == "user1"
+    assert group.members[1].value == "group2"