diff --git a/crates/astria-sequencer-relayer/tests/blackbox/helpers/mock_sequencer_server.rs b/crates/astria-sequencer-relayer/tests/blackbox/helpers/mock_sequencer_server.rs
index 33ff34d989..afa93e5842 100644
--- a/crates/astria-sequencer-relayer/tests/blackbox/helpers/mock_sequencer_server.rs
+++ b/crates/astria-sequencer-relayer/tests/blackbox/helpers/mock_sequencer_server.rs
@@ -99,7 +99,7 @@ impl MockSequencerServer {
 pub enum SequencerBlockToMount {
     GoodAtHeight(u32),
     BadAtHeight(u32),
-    Block(SequencerBlock),
+    Block(Box<SequencerBlock>),
 }
 
 struct SequencerServiceImpl(MockServer);
@@ -152,7 +152,7 @@ fn prepare_sequencer_block_response(
             ..Default::default()
         }
         .make(),
-        SequencerBlockToMount::Block(block) => block,
+        SequencerBlockToMount::Block(block) => *block,
     };
 
     let mut block = block.into_raw();
diff --git a/crates/astria-sequencer-relayer/tests/blackbox/main.rs b/crates/astria-sequencer-relayer/tests/blackbox/main.rs
index 93770c5dce..a9a4b40dc2 100644
--- a/crates/astria-sequencer-relayer/tests/blackbox/main.rs
+++ b/crates/astria-sequencer-relayer/tests/blackbox/main.rs
@@ -263,7 +263,7 @@ async fn should_filter_rollup() {
         ..Default::default()
     }
     .make();
-    let block_to_mount = SequencerBlockToMount::Block(block);
+    let block_to_mount = SequencerBlockToMount::Block(Box::new(block));
 
     sequencer_relayer.mount_abci_response(1).await;
     sequencer_relayer