diff --git a/capiscio_sdk/validators/message.py b/capiscio_sdk/validators/message.py
index e9a6757..554ee72 100644
--- a/capiscio_sdk/validators/message.py
+++ b/capiscio_sdk/validators/message.py
@@ -1,7 +1,8 @@
 """Message validation logic."""
 from typing import TYPE_CHECKING, Any, Dict, List
 from ..types import ValidationResult, ValidationIssue, ValidationSeverity
-from ..scoring import TrustScorer, AvailabilityScorer
+# Import legacy scorer directly to avoid deprecation warning (we only use score_not_tested)
+from ..scoring.availability import AvailabilityScorer as _LegacyAvailabilityScorer
 
 if TYPE_CHECKING:
     from ..scoring.types import ComplianceScore
@@ -19,8 +20,8 @@ class MessageValidator:
     def __init__(self) -> None:
         """Initialize message validator."""
         self._url_validator = URLSecurityValidator()
-        self._trust_scorer = TrustScorer()
-        self._availability_scorer = AvailabilityScorer()
+        # Use legacy scorer directly (not the deprecated wrapper) for score_not_tested()
+        self._availability_scorer = _LegacyAvailabilityScorer()
 
     def validate(self, message: Dict[str, Any], skip_signature_verification: bool = True) -> ValidationResult:
         """
diff --git a/pyproject.toml b/pyproject.toml
index 7386c3c..66a9c7d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,6 +69,10 @@ testpaths = ["tests"]
 python_files = ["test_*.py"]
 python_classes = ["Test*"]
 python_functions = ["test_*"]
+markers = [
+    "integration: marks tests as integration tests (require external services)",
+    "slow: marks tests as slow (deselect with '-m not slow')",
+]
 
 [tool.coverage.run]
 source = ["capiscio_sdk"]