diff --git a/tests/fixtures/zuul.conf b/tests/fixtures/zuul.conf
index b66b489..916cddd 100644
--- a/tests/fixtures/zuul.conf
+++ b/tests/fixtures/zuul.conf
@@ -10,3 +10,4 @@
 
 [zuul]
 layout_config=layout.yaml
+git_dir=/tmp/zuul-test/git