# Download the JDBC drivers used in the tests oldJarFolder <- Sys.getenv("DATABASECONNECTOR_JAR_FOLDER") Sys.setenv("DATABASECONNECTOR_JAR_FOLDER" = file.path(tempdir(check = TRUE), "drivers")) DatabaseConnector::downloadJdbcDrivers("postgresql") # downloadJdbcDrivers("sql server") # downloadJdbcDrivers("oracle") withr::defer({ unlink(Sys.getenv("DATABASECONNECTOR_JAR_FOLDER"), recursive = TRUE, force = TRUE) Sys.setenv("DATABASECONNECTOR_JAR_FOLDER" = oldJarFolder) }, testthat::teardown_env())