diff --git a/sqlite_utils/cli.py b/sqlite_utils/cli.py
index 05ff9d3..86eddfb 100644
--- a/sqlite_utils/cli.py
+++ b/sqlite_utils/cli.py
@@ -6,6 +6,7 @@ import hashlib
 import pathlib
 import sqlite_utils
 from sqlite_utils.db import AlterError, BadMultiValues, DescIndex
+from sqlite_utils.utils import maximize_csv_field_size_limit
 from sqlite_utils import recipes
 import textwrap
 import inspect
@@ -46,17 +47,7 @@ If you do not know the encoding, running 'file filename.csv' may tell you.
 It's often worth trying: --encoding=latin-1
 """.strip()
 
-
-# Increase CSV field size limit to maximum possible
-# https://stackoverflow.com/a/15063941
-field_size_limit = sys.maxsize
-
-while True:
-    try:
-        csv_std.field_size_limit(field_size_limit)
-        break
-    except OverflowError:
-        field_size_limit = int(field_size_limit / 10)
+maximize_csv_field_size_limit()
 
 
 def output_options(fn):
diff --git a/sqlite_utils/utils.py b/sqlite_utils/utils.py
index 141356a..d2ccc5f 100644
--- a/sqlite_utils/utils.py
+++ b/sqlite_utils/utils.py
@@ -7,6 +7,7 @@ import io
 import itertools
 import json
 import os
+import sys
 from . import recipes
 from typing import Dict, cast, BinaryIO, Iterable, Optional, Tuple, Type
 
@@ -29,6 +30,24 @@ SPATIALITE_PATHS = (
     "/usr/local/lib/mod_spatialite.dylib",
 )
 
+# Mainly so we can restore it if needed in the tests:
+ORIGINAL_CSV_FIELD_SIZE_LIMIT = csv.field_size_limit()
+
+
+def maximize_csv_field_size_limit():
+    """
+    Increase the CSV field size limit to the maximum possible.
+    """
+    # https://stackoverflow.com/a/15063941
+    field_size_limit = sys.maxsize
+
+    while True:
+        try:
+            csv.field_size_limit(field_size_limit)
+            break
+        except OverflowError:
+            field_size_limit = int(field_size_limit / 10)
+
 
 def find_spatialite() -> Optional[str]:
     """
diff --git a/tests/test_rows_from_file.py b/tests/test_rows_from_file.py
index 5575b34..fdc7a03 100644
--- a/tests/test_rows_from_file.py
+++ b/tests/test_rows_from_file.py
@@ -19,7 +19,7 @@ def test_rows_from_file_detect_format(input, expected_format):
 
 
 @pytest.mark.parametrize(
-    "ignore_extras,restkey,expected",
+    "ignore_extras,extras_key,expected",
     (
         (True, None, [{"id": "1", "name": "Cleo"}]),
         (False, "_rest", [{"id": "1", "name": "Cleo", "_rest": ["oops"]}]),
@@ -27,13 +27,13 @@ def test_rows_from_file_detect_format(input, expected_format):
         (False, False, None),
     ),
 )
-def test_rows_from_file_extra_fields_strategies(ignore_extras, restkey, expected):
+def test_rows_from_file_extra_fields_strategies(ignore_extras, extras_key, expected):
     try:
         rows, format = rows_from_file(
             BytesIO(b"id,name\r\n1,Cleo,oops"),
             format=Format.CSV,
             ignore_extras=ignore_extras,
-            restkey=restkey,
+            extras_key=extras_key,
         )
         list_rows = list(rows)
     except RowError: