diff --git a/tests/ast/decoder.py b/tests/ast/decoder.py
index 6989b9cefb..23b5c2c121 100644
--- a/tests/ast/decoder.py
+++ b/tests/ast/decoder.py
@@ -447,6 +447,11 @@ def decode_timezone_expr(self, tz_expr: proto.PythonTimeZone) -> Any:
     def binop(self, ast, fn):
         return fn(self.decode_expr(ast.lhs), self.decode_expr(ast.rhs))
 
+    def bitop(self, ast, fn):
+        lhs = self.decode_expr(ast.lhs)
+        rhs = self.decode_expr(ast.rhs)
+        return getattr(lhs, fn)(rhs)
+
     def get_statement_params(self, d: Dict):
         statement_params = {}
         statement_params_list = d.get("statementParams", [])
@@ -732,6 +737,27 @@ def decode_expr(self, expr: proto.Expr) -> Any:
                 # "or" is reserved keyword in python - so have to use getattr here.
                 return self.binop(getattr(expr, "or"), lambda lhs, rhs: lhs | rhs)
 
+            # bit operations on columns
+            case "bit_and":
+                return self.bitop(expr.bit_and, "bitwiseAnd")
+
+            case "bit_or":
+                return self.bitop(expr.bit_or, "bitwiseOR")
+
+            case "bit_xor":
+                return self.bitop(expr.bit_xor, "bitwiseXOR")
+
+            # Unary operations on columns:
+            case "neg":
+                col = self.decode_expr(expr.neg.operand)
+                return -col
+
+            case "not":
+                # not is a reserved word in python.
+                col_expr = getattr(expr, "not").operand
+                col = self.decode_expr(col_expr)
+                return ~col
+
             # DATAFRAME FUNCTIONS
             case "sp_create_dataframe":
                 data = self.decode_dataframe_data_expr(expr.sp_create_dataframe.data)