diff --git a/projects/mercurial/project.yaml b/projects/mercurial/project.yaml
index bd68d6938..2908b04b4 100644
--- a/projects/mercurial/project.yaml
+++ b/projects/mercurial/project.yaml
@@ -10,3 +10,4 @@ sanitizers:
   - address
   - undefined
   - memory
+coverage_extra_args: -ignore-filename-regex=.*/sanpy/.*