diff --git a/t/helper/test-bloom.c b/t/helper/test-bloom.c
index f0aa80b98e..5e77d56f59 100644
--- a/t/helper/test-bloom.c
+++ b/t/helper/test-bloom.c
@@ -50,6 +50,8 @@ static const char *bloom_usage = "\n"
 
 int cmd__bloom(int argc, const char **argv)
 {
+	setup_git_directory();
+
 	if (argc < 2)
 		usage(bloom_usage);