test: fix noextras build

Author: tswast

tests/unit/core/compile/sqlglot/test_dataframe_accessor.py

@@ -15,10 +15,13 @@
 import unittest.mock as mock
 
 import pandas as pd
+import pytest
 
 import bigframes.pandas as bpd
 import bigframes.session
 
+pytest.importorskip("pytest_snapshot")
+
 
 def test_sql_scalar(scalar_types_df: bpd.DataFrame, snapshot, monkeypatch):
     session = mock.create_autospec(bigframes.session.Session)