diff --git a/ibis_ml/steps/_handle_outliers.py b/ibis_ml/steps/_handle_outliers.py
index 43a6a54..140e18a 100644
--- a/ibis_ml/steps/_handle_outliers.py
+++ b/ibis_ml/steps/_handle_outliers.py
@@ -143,9 +143,9 @@ def transform_table(self, table: ir.Table) -> ir.Table:
                         (table[col_name] >= stat["lower_bound"])
                         & (table[col_name] <= stat["upper_bound"])
                         | (
-                            (table[col_name].isnull() | table[col_name].isnan())  # noqa: PD003
-                            if table[col_name].type().is_floating()
-                            else table[col_name].isnull()  # noqa: PD003
+                            table[col_name].isnull()  # noqa: PD003
+                            | table[col_name].type().is_floating()
+                            & table[col_name].isnan()
                         )
                     )
                     for col_name, stat in self.stats_.items()
diff --git a/tests/test_handle_outliers.py b/tests/test_handle_outliers.py
index 1815e61..0192a57 100644
--- a/tests/test_handle_outliers.py
+++ b/tests/test_handle_outliers.py
@@ -92,7 +92,7 @@ def test_handle_univariate_outliers(
         {
             # use same value for easier calculation statistics
             "int_col": [0] * 10,  # mean = 0, std = 0 Q1 = 0, Q3 = 0
-            "floating_col": [0.0] * 10,  # mean = 0, std = 0 Q1 = 0, Q3 = 0
+            "floating_col": [0.0] * 10,  # mean = 0, std = 0, Q1 = 0, Q3 = 0
         }
     )