--- a/.hgignore
+++ b/.hgignore
@@ -119,8 +119,12 @@ GPATH
 # 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
 ^testing/talos/bin/
 ^testing/talos/include/
 ^testing/talos/lib/
 ^testing/talos/talos/page_load_test/tp5n/
+
+# Ignore mozharness coverage
+^testing/mozharness/coverage
+^testing/mozharness/.coverage