diff --git a/.gitattributes b/.gitattributes
index da974e4b..9053428d 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2,6 +2,6 @@
 * text=auto
 
 # Improve accuracy of GitHub's Linguist-powered language statistics
-pelican/tests/content/*
-pelican/tests/output/*
+pelican/tests/content/* linguist-vendored
+pelican/tests/output/* linguist-vendored
 samples/* linguist-vendored