Alt text for Tracking Pixel

In doing some email deliverability testing I have found that I'm getting a slight ding for having an image without alt text. It took me a while to figure it out (as I thought I had alt text on all my images) but it turns out that the image in question is the 1x1 pixel tracking image used to track the email. 

Is there any way to add alt text (I would just add a blank " ") to the tracking pixel to alleviate this issue? 

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