diff --git a/csharp/test/Drivers/Snowflake/ClientTests.cs b/csharp/test/Drivers/Snowflake/ClientTests.cs
index ce33f991be..e895865024 100644
--- a/csharp/test/Drivers/Snowflake/ClientTests.cs
+++ b/csharp/test/Drivers/Snowflake/ClientTests.cs
@@ -253,6 +253,7 @@ private Adbc.Client.AdbcConnection GetSnowflakeAdbcConnectionUsingConnectionStri
             else if (string.IsNullOrEmpty(authType) || authType == SnowflakeAuthentication.AuthSnowflake)
             {
                 // if no auth type is specified, use the snowflake auth
+                builder[SnowflakeParameters.AUTH_TYPE] = SnowflakeAuthentication.AuthSnowflake;
                 builder[SnowflakeParameters.USERNAME] = testConfiguration.Authentication.Default.User;
                 builder[SnowflakeParameters.PASSWORD] = testConfiguration.Authentication.Default.Password;
             }