diff --git a/testsuite/pylintrc.conf b/testsuite/pylintrc.conf
index ce7e407dfc..019adafc22 100644
--- a/testsuite/pylintrc.conf
+++ b/testsuite/pylintrc.conf
@@ -21,6 +21,10 @@ persistent=no
 # usually to register additional checkers.
 load-plugins=ext.exception_messages,ext.ssl_protocols,ext.pylint_compat
 
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code
+extension-pkg-whitelist=lxml,posix1e
 
 [MESSAGES CONTROL]