select_font tests fail when other fonts present on the system

I am seeing the following errors, because the tests are expecting DejaVu fonts to be the result. I have DejaVu fonts installed, but other fonts are being selected. My guess is that the results I am getting are "correct" for my system.

---- test::select_best_match_sans_serif stdout ----
thread 'test::select_best_match_sans_serif' panicked at tests/select_font.rs:57:13:
assertion `left == right` failed
  left: Some("arial.ttf")
 right: Some("DejaVuSans.ttf")
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- test::select_best_match_bold_sans_serif stdout ----
thread 'test::select_best_match_bold_sans_serif' panicked at tests/select_font.rs:57:13:
assertion `left == right` failed
  left: Some("arialbd.ttf")
 right: Some("DejaVuSans-Bold.ttf")

---- test::select_best_match_monospace stdout ----
thread 'test::select_best_match_monospace' panicked at tests/select_font.rs:57:13:
assertion `left == right` failed
  left: Some("SourceCodePro-Regular.otf")
 right: Some("DejaVuSansMono.ttf")

---- test::select_best_match_serif stdout ----
thread 'test::select_best_match_serif' panicked at tests/select_font.rs:57:13:
assertion `left == right` failed
  left: Some("times.ttf")
 right: Some("DejaVuSerif.ttf")

Start by running the failing tests in tests/select_font.rs, especially the cases reported at line 57, and inspect how they choose and compare font filenames. The work is done when these tests no longer depend on unrelated fonts installed on the system while still checking the intended selection behavior.