Without knowing whether or not one of them is homozygous for tobiano, or if either of them is a red (e) carrier, you have about a 70% chance of black tobiano. There is also a possibility for black (about 23% chance), chestnut (1.5~%), or chestnut tobiano (4.7~%)
Not sure on the tobiano but the black yes for sure.....I didn't know there was a test for the tobiano......thought it was just the pattern? Humm the things we learn everyday. So how would I know if they are for sure?