diff --git a/.gitignore b/.gitignore
index 00d35f46..7f0f313f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,16 @@
+# Build files
 /cross
 /docs/book/*
 /target
+
+# Tests
 /tests/plain.fmt
 /tests/00*00-latex-*.fmt
 /tests/*-plain-*.fmt
 /tests/xenia/paper.pdf
+
+# Tectonic bundles
+*.ttb
+
+# Misc
+*.ignore
\ No newline at end of file