Fix pymssql tests (#1386)

Author: TimPansino

tox.ini

@@ -62,7 +62,8 @@ envlist =
     mongodb3-datastore_pymongo-{py37,py38,py39,py310,py311,py312}-pymongo03,
     mongodb8-datastore_pymongo-{py37,py38,py39,py310,py311,py312,py313,pypy310}-pymongo04,
     mysql-datastore_aiomysql-{py37,py38,py39,py310,py311,py312,py313,pypy310},
-    mssql-datastore_pymssql-{py37,py38,py39,py310,py311,py312,py313},
+    mssql-datastore_pymssql-pymssqllatest-{py39,py310,py311,py312,py313},
+    mssql-datastore_pymssql-pymssql020301-{py37,py38},
     mysql-datastore_mysql-mysqllatest-{py37,py38,py39,py310,py311,py312,py313},
     mysql-datastore_mysqldb-{py38,py39,py310,py311,py312,py313},
     mysql-datastore_pymysql-{py37,py38,py39,py310,py311,py312,py313,pypy310},
@@ -288,7 +289,8 @@ deps =
     datastore_motor-motorlatest: tornado
     datastore_pymongo-pymongo03: pymongo<4.0
     datastore_pymongo-pymongo04: pymongo<5.0
-    datastore_pymssql: pymssql
+    datastore_pymssql-pymssqllatest: pymssql
+    datastore_pymssql-pymssql020301: pymssql==2.3.1
     datastore_pymysql: PyMySQL
     datastore_pymysql: cryptography
     datastore_pysolr: pysolr<4.0