Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_26010857_13 (stage VARCHAR, teams_classification VARCHAR)
### Question:
What is the number of stages where the teams classification leader is Cervélo Testteam?
### Answer:
SELECT COUNT(stage) FROM table_26010857_13 WHERE teams_classification = "Cervélo TestTeam"