diff --git a/tests/test_signature_features.py b/tests/test_signature_features.py
index 75d173e..0bb9668 100644
--- a/tests/test_signature_features.py
+++ b/tests/test_signature_features.py
@@ -9,6 +9,7 @@
 from datetime import datetime, timedelta
 
 pytest.importorskip("alphaforge")
+pytest.importorskip("esig")
 
 from volatility_forecast.features.signature_features import SignatureFeaturesTemplate
 from volatility_forecast.sources.simulated_garch import SimulatedGARCHSource