diff --git a/django-stubs/db/models/manager.pyi b/django-stubs/db/models/manager.pyi
index f0ba75b..bac3672 100644
--- a/django-stubs/db/models/manager.pyi
+++ b/django-stubs/db/models/manager.pyi
@@ -4,6 +4,7 @@ from django.db.models.base import Model
 from django.db.models.query import QuerySet
 
 _T = TypeVar("_T", bound=Model, covariant=True)
+_Self = TypeVar('_Self', bound='BaseManager')
 
 class BaseManager(QuerySet[_T]):
     creation_counter: int = ...
@@ -16,7 +17,7 @@ class BaseManager(QuerySet[_T]):
     def deconstruct(self) -> Tuple[bool, str, None, Tuple, Dict[str, int]]: ...
     def check(self, **kwargs: Any) -> List[Any]: ...
     @classmethod
-    def from_queryset(cls, queryset_class: Any, class_name: Optional[Any] = ...): ...
+    def from_queryset(cls: Type[_Self], queryset_class: Any, class_name: Optional[Any] = ...) -> Type[_Self]:  ...
     @classmethod
     def _get_queryset_methods(cls, queryset_class: type) -> Dict[str, Any]: ...
     def contribute_to_class(self, model: Type[Model], name: str) -> None: ...
diff --git a/scripts/typecheck_tests.py b/scripts/typecheck_tests.py
index e3098bf..a4dfffb 100644
--- a/scripts/typecheck_tests.py
+++ b/scripts/typecheck_tests.py
@@ -35,7 +35,7 @@ IGNORED_ERRORS = {
         # settings
         re.compile(r'Module has no attribute "[A-Z_]+"'),
         # attributes assigned to test functions
-        re.compile(r'"Callable\[\[(Any(, )?)+\], Any\]" has no attribute'),
+        re.compile(r'"Callable\[\[(Any(, )?)+(, VarArg\(Any\))?(, KwArg\(Any\))?\], Any\]" has no attribute'),
         # assign empty tuple
         re.compile(r'Incompatible types in assignment \(expression has type "Tuple\[\]", '
                    r'variable has type "Tuple\[[A-Za-z, ]+\]"'),
@@ -70,6 +70,19 @@ IGNORED_ERRORS = {
     'builtin_server': [
         'has no attribute "getvalue"'
     ],
+    'custom_lookups': [
+        'in base class "SQLFuncMixin"'
+    ],
+    'custom_managers': [
+        '_filter_CustomQuerySet',
+        '_filter_CustomManager',
+        re.compile(r'Cannot determine type of \'(abstract_persons|cars|plain_manager)\''),
+        # TODO: remove after 'objects' and '_default_manager' are handled in the plugin
+        'Incompatible types in assignment (expression has type "CharField", '
+        + 'base class "Model" defined the type as "Manager[Model]")',
+        # TODO: remove after from_queryset() handled in the plugin
+        'Invalid base class'
+    ],
     'csrf_tests': [
         'Incompatible types in assignment (expression has type "property", ' +
         'base class "HttpRequest" defined the type as "QueryDict")'
@@ -167,8 +180,8 @@ TESTS_DIRS = [
     'context_processors',
     'csrf_tests',
     'custom_columns',
-    # TODO: 'custom_lookups',
-    # TODO: 'custom_managers',
+    'custom_lookups',
+    'custom_managers',
     'custom_methods',
     'custom_migration_operations',
     'custom_pk',