diff --git a/.config/ci/test.sh b/.config/ci/test.sh
index f6d58f5d150..bfccbb89396 100755
--- a/.config/ci/test.sh
+++ b/.config/ci/test.sh
@@ -133,3 +133,17 @@ sys.exit()
 EOF
 echo "DEBUG: TEMPFILE=${TEMPFILE}"
 ./run_scapy -H -c "${TEMPFILE}" || exit 1
+
+# DEBUG
+# OSX: clear DNS cache
+if [[ "$OSTYPE" = "darwin"* ]]
+then
+    echo "HEY"
+    # https://www.hongkiat.com/blog/clear-dns-cache-mac/
+    sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
+    ifconfig
+    cat /etc/resolv.conf
+    ping 1.1.1.1
+    dig google.com
+fi
+