diff --git a/pyproject.toml b/pyproject.toml
index 4441660c50..2038ccd81f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,6 +4,7 @@
 
 [tool.coverage.run]
 branch = true
+core = "ctrace"
 omit = [
     "/tmp/*",
     "*/tests/*",