diff --git a/api/controller/artifacts_unittest.py b/api/controller/artifacts_unittest.py
index 082a799..faf7ab0 100644
--- a/api/controller/artifacts_unittest.py
+++ b/api/controller/artifacts_unittest.py
@@ -91,6 +91,7 @@
             self.chroot_path, self.sysroot_path.lstrip(os.sep)
         )
         osutils.SafeMakedirs(full_sysroot_path)
+        osutils.SafeMakedirs(self.chroot_out_path)
 
         # All requests use same response type.
         self.response = artifacts_pb2.BundleResponse()