diff --git a/tests/unit/samples/wiringfastdepends/sample.py b/tests/unit/samples/wiringfastdepends/sample.py
index da58e8f2..28310052 100644
--- a/tests/unit/samples/wiringfastdepends/sample.py
+++ b/tests/unit/samples/wiringfastdepends/sample.py
@@ -3,6 +3,7 @@ import sys
 from dependency_injector import containers, providers
 from dependency_injector.wiring import inject, Provide
 from fast_depends import Depends
+from typing_extensions import Annotated
 
 
 class CoefficientService:
@@ -23,5 +24,13 @@ def apply_coefficient(
     return a * coefficient_provider.get_coefficient()
 
 
+@inject
+def apply_coefficient_annotated(
+    a: int,
+    coefficient_provider: Annotated[CoefficientService, Depends(Provide[Container.service])],
+) -> float:
+    return a * coefficient_provider.get_coefficient()
+
+
 container = Container()
 container.wire(modules=[sys.modules[__name__]])
\ No newline at end of file
diff --git a/tests/unit/wiring/test_fastdepends.py b/tests/unit/wiring/test_fastdepends.py
index 32118e59..2c326143 100644
--- a/tests/unit/wiring/test_fastdepends.py
+++ b/tests/unit/wiring/test_fastdepends.py
@@ -3,5 +3,9 @@ from dependency_injector.wiring import inject, Provide
 from wiringfastdepends import sample
 
 
-def test_apply_coefficient():
-    assert sample.apply_coefficient(100) == 120.0
\ No newline at end of file
+def test_apply_coefficient() -> None:
+    assert sample.apply_coefficient(100) == 120.0
+
+
+def test_apply_coefficient_annotated() -> None:
+    assert sample.apply_coefficient_annotated(100) == 120.0
\ No newline at end of file