diff --git a/.coveragerc b/.coveragerc
index 4eab3e33381..e5a68198b84 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -10,6 +10,9 @@ include =
   *\Lib\site-packages\pytest.py
 parallel = 1
 branch = 1
+# The sysmon core (default since Python 3.14) is much slower.
+# Perhaps: https://github.com/coveragepy/coveragepy/issues/2082
+core = ctrace
 
 [paths]
 source = src/