ok, thanks for your reply.

This is the html I copied under temp before merging to PDF. From here you can see that I used my own font, so the font of win and linux should be the same.

When using compare-pdf to compare two PDFs, the differences will be highlighted, such as the green part in the figure.

The position of the fonts generated by win and linux is a little bit different, which leads to this problem.

    //Version Information
    "jsreport": "^2.11.0",
    "jsreport-chrome-pdf": "=1.9.0",
    "compare-pdf": "^1.1.8",

As shown in the figure below, the PDF exported on different platforms will have a little difference, which will cause the PDF test to fail.
Is there a good solution to this problem, thanks.