diff --git a/tox.ini b/tox.ini
index 187a40d1..33ba5992 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,8 @@ setenv =
     # Set COVERAGE_CORE only for Python >= 3.12
     COVERAGE_CORE=sysmon
     py311: COVERAGE_CORE=
+    py310: COVERAGE_CORE=
+    py39: COVERAGE_CORE=
 
 # Run testsuite with coverage when '-cov' and with multi-threading when '-xdist'
 # is in the env name