Test doesn't pass if connection string contains MultiSubnetFailover

[uacousin]

MapReturnsTheSameConnectionStringIfThereIsNoSubstitute test fails if we use connection string which contains MultiSubnetFailover option.
For example:
"Data Source=myServerAddress;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;MultiSubnetFailover=True"
Resulted string will be: "Data Source=myServerAddress;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;Multi Subnet Failover=True".
Problem I think with new Microsoft.Data.SqlClient