diff --git a/test/interactive/vm.nix b/test/interactive/vm.nix
index c1239a64..522878e9 100644
--- a/test/interactive/vm.nix
+++ b/test/interactive/vm.nix
@@ -49,6 +49,7 @@
       };
       script = ''
         chown -R alice:users /mnt/src/
+        chmod -R +w /mnt/src/
       '';
     };
   };