--- a/.hgignore
+++ b/.hgignore
@@ -115,16 +115,17 @@ GPATH
 ^testing/mozharness/.coverage
 ^testing/mozharness/nosetests.xml
 
 # Ignore tox generated dir
 .tox/
 
 # Ignore ESLint node_modules
 ^node_modules/
+^tools/lint/eslint/eslint-plugin-mozilla/node_modules/
 
 # Ignore talos virtualenv and tp5n files.
 # The tp5n set is supposed to be decompressed at
 # testing/talos/talos/tests/tp5n in order to run tests like tps
 # locally. Similarly, running talos requires a Python package virtual
 # environment. Both the virtual environment and tp5n files end up littering
 # the status command, so we ignore them.
 ^testing/talos/.Python