diff --git a/tvix/nix_cli/src/bin/nix-store.rs b/tvix/nix_cli/src/bin/nix-store.rs
index 89b33dd81..1cd64e8d1 100644
--- a/tvix/nix_cli/src/bin/nix-store.rs
+++ b/tvix/nix_cli/src/bin/nix-store.rs
@@ -32,6 +32,7 @@ mod integration_tests {
 
     #[derive(Debug)]
     enum NixOutput {
+        #[allow(dead_code)]
         Err {
             status: i32,
             stdout: String,