diff --git a/notebooks/market/volatility/EquityVolSurfaceConstructionSVI.ipynb b/notebooks/market/volatility/EquityVolSurfaceConstructionSVI.ipynb
index 74e7d6a0..27655da0 100644
--- a/notebooks/market/volatility/EquityVolSurfaceConstructionSVI.ipynb
+++ b/notebooks/market/volatility/EquityVolSurfaceConstructionSVI.ipynb
@@ -244,7 +244,6 @@
                 }
             ],
             "source": [
-                "tol = 1e-4\n",
                 "equitySurface.check_calibration(False)"
             ]
         },