diff --git a/test-integration/test_integration/fixtures/setup-subprocess-double-fork-project/.gitignore b/test-integration/test_integration/fixtures/setup-subprocess-double-fork-project/.gitignore
new file mode 100644
index 0000000000..8d462b2b5a
--- /dev/null
+++ b/test-integration/test_integration/fixtures/setup-subprocess-double-fork-project/.gitignore
@@ -0,0 +1,2 @@
+.inbox
+.outbox