Well, first off, testing on a dummy 108 times in a row seems weird, but I don't train in your system so I am looking at it from an outsider.
Second, are there any other benefits to getting this test out of the way? What is the purpose of this test to begin with? What information access do you get after this test is done? Are their elements of your training that you want to go through that you have limited access to because they come after this test?
The reason I am asking is that a lot of times, a test is not about the test or the certificate/belt/tip. It is about how you respond with situations that make you uncomfortable and that you might not want to do. Now granted, being concerned that the test might effect your job performance is a valid concern and your teacher should take that into consideration. But I know that we have some grueling test in our system (usually black belt test) and we have had to have students work their schedules and eating habits around to make it work, especially since they know that once it is done, they don't have to worry about it anymore. In the end for them, it was either proving something to themselves, or what they get access to once it is done.
As for feeling pressured to test. There has been a few times in my training where I have felt this way. However once it was done, I realized that I was making it a lot bigger then it was and that the most important skill I learned from those test had nothing to do with kicking or punching. Those test ended up being about learning how to approach and deal with situations that I didn't want to deal with or that I didn't see the point in doing. Whether people like it or not, the ability to do that is a really important life skill to have.
I am not saying you should or should not take the test. That is up to you. But there might be more going on here then just getting a certificate and some bruised arms.