diff --git a/.gitignore b/.gitignore
index 7d7cad2..9b8c3e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,4 +50,5 @@
 /test/internal_utils
 /test/source_base
 /test/source_event
+/test/source_io
 /test/source_time