diff --git a/.gitattributes b/.gitattributes
index 9053428d..b6e6ec8f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,4 +4,7 @@
 # Improve accuracy of GitHub's Linguist-powered language statistics
 pelican/tests/content/* linguist-vendored
 pelican/tests/output/* linguist-vendored
+pelican/tests/theme_overrides/* linguist-vendored
+pelican/themes/notmyidea/templates/*.html linguist-language=Jinja
+pelican/themes/simple/templates/*.html linguist-language=Jinja
 samples/* linguist-vendored