diff --git a/packages/doeff-gemini/src/doeff_gemini/types.py b/packages/doeff-gemini/src/doeff_gemini/types.py
index f9d99fdf..1fc61720 100644
--- a/packages/doeff-gemini/src/doeff_gemini/types.py
+++ b/packages/doeff-gemini/src/doeff_gemini/types.py
@@ -1,5 +1,7 @@
 """Shared type definitions for the Gemini integration."""
 
+from __future__ import annotations
+
 
 from dataclasses import dataclass
 from datetime import datetime
diff --git a/packages/doeff-vm/tests/test_traceback_pure_python_frames.py b/packages/doeff-vm/tests/test_traceback_pure_python_frames.py
index 8831c996..adcc4abc 100644
--- a/packages/doeff-vm/tests/test_traceback_pure_python_frames.py
+++ b/packages/doeff-vm/tests/test_traceback_pure_python_frames.py
@@ -28,6 +28,9 @@
     The cllm_compute.py:184 frame is completely lost.
 """
 
+from __future__ import annotations
+
+
 import pytest
 from doeff_vm import WithHandler
 
diff --git a/tests/effects/test_pure_effect.py b/tests/effects/test_pure_effect.py
index f25abbce..2abe4d28 100644
--- a/tests/effects/test_pure_effect.py
+++ b/tests/effects/test_pure_effect.py
@@ -1,5 +1,7 @@
 """Tests for Pure - the immediate value effect (Pure case of Free monad)."""
 
+from __future__ import annotations
+
 import pytest
 from doeff_vm import Pure