diff --git a/.gitignore b/.gitignore
index de027a7f..3de92797 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,5 @@ Changelog.linkchecker*
 /linkchecker.prof
 .cache
 .tox
+tests/checker/data/https_cert.pem
+tests/checker/data/https_key.pem