CREATE TABLE table_78751 ("Opposing Teams" CLOB, "Against" FLOAT, "Date" CLOB, "Venue" CLOB, "Status" CLOB)

When was the status test match with an opposing team of south africa?
SELECT "Date" FROM table_78751 WHERE "Status" = 'test match' AND "Opposing Teams" = 'south africa'
SELECT "Date" FROM "table_78751" WHERE "Opposing Teams" = 'south africa' AND "Status" = 'test match'