diff --git a/web3_proxy/src/app/mod.rs b/web3_proxy/src/app/mod.rs
index 5687df69..15959a5c 100644
--- a/web3_proxy/src/app/mod.rs
+++ b/web3_proxy/src/app/mod.rs
@@ -1288,7 +1288,7 @@ impl Web3ProxyApp {
                         authorization,
                         &request,
                         Some(request_metadata.clone()),
-                        Some(&head_block_num),
+                        None,
                         None,
                         Level::Trace,
                         num,
diff --git a/web3_proxy/src/rpcs/many.rs b/web3_proxy/src/rpcs/many.rs
index ab2cfbcd..3425d64a 100644
--- a/web3_proxy/src/rpcs/many.rs
+++ b/web3_proxy/src/rpcs/many.rs
@@ -1676,7 +1676,156 @@ mod tests {
         }
     }
 
-    fn test_all_connections() {
-        todo!()
+    #[tokio::test]
+    async fn test_all_connections() {
+        let _ = env_logger::builder()
+            .filter_level(LevelFilter::Error)
+            .filter_module("web3_proxy", LevelFilter::Trace)
+            .is_test(true)
+            .try_init();
+
+        // TODO: use chrono, not SystemTime
+        let now: U256 = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap()
+            .as_secs()
+            .into();
+
+        let block_1 = Block {
+            hash: Some(H256::random()),
+            number: Some(1_000_000.into()),
+            parent_hash: H256::random(),
+            timestamp: now,
+            ..Default::default()
+        };
+        let block_2 = Block {
+            hash: Some(H256::random()),
+            number: Some(1_000_001.into()),
+            parent_hash: block_1.hash.unwrap(),
+            timestamp: now + 1,
+            ..Default::default()
+        };
+
+        let block_1: Web3ProxyBlock = Arc::new(block_1).try_into().unwrap();
+        let block_2: Web3ProxyBlock = Arc::new(block_2).try_into().unwrap();
+
+        let mock_geth = Web3Rpc {
+            name: "mock_geth".to_string(),
+            soft_limit: 1_000,
+            automatic_block_limit: false,
+            backup: false,
+            block_data_limit: 64.into(),
+            tier: 0,
+            head_block: RwLock::new(Some(block_1.clone())),
+            provider: AsyncRwLock::new(Some(Arc::new(Web3Provider::Mock))),
+            ..Default::default()
+        };
+
+        let mock_erigon_archive = Web3Rpc {
+            name: "mock_erigon_archive".to_string(),
+            soft_limit: 1_000,
+            automatic_block_limit: false,
+            backup: false,
+            block_data_limit: u64::MAX.into(),
+            tier: 1,
+            head_block: RwLock::new(Some(block_2.clone())),
+            provider: AsyncRwLock::new(Some(Arc::new(Web3Provider::Mock))),
+            ..Default::default()
+        };
+
+        assert!(mock_geth.has_block_data(block_1.number()));
+        assert!(mock_erigon_archive.has_block_data(block_1.number()));
+        assert!(!mock_geth.has_block_data(block_2.number()));
+        assert!(mock_erigon_archive.has_block_data(block_2.number()));
+
+        let mock_geth = Arc::new(mock_geth);
+        let mock_erigon_archive = Arc::new(mock_erigon_archive);
+
+        let rpcs_by_name = HashMap::from([
+            (mock_geth.name.clone(), mock_geth.clone()),
+            (
+                mock_erigon_archive.name.clone(),
+                mock_erigon_archive.clone(),
+            ),
+        ]);
+
+        let (block_sender, _) = flume::unbounded();
+        let (pending_tx_id_sender, pending_tx_id_receiver) = flume::unbounded();
+        let (watch_consensus_rpcs_sender, _) = watch::channel(Default::default());
+        let (watch_consensus_head_sender, _watch_consensus_head_receiver) =
+            watch::channel(Default::default());
+
+        // TODO: make a Web3Rpcs::new
+        let rpcs = Web3Rpcs {
+            block_sender,
+            by_name: RwLock::new(rpcs_by_name),
+            http_interval_sender: None,
+            watch_consensus_head_sender: Some(watch_consensus_head_sender),
+            watch_consensus_rpcs_sender,
+            pending_transaction_cache: Cache::builder()
+                .build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::default()),
+            pending_tx_id_receiver,
+            pending_tx_id_sender,
+            blocks_by_hash: Cache::builder()
+                .build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::default()),
+            blocks_by_number: Cache::builder()
+                .build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::default()),
+            min_head_rpcs: 1,
+            min_sum_soft_limit: 1_000,
+            max_block_age: None,
+            max_block_lag: None,
+        };
+
+        let authorization = Arc::new(Authorization::internal(None).unwrap());
+
+        let mut connection_heads = ConsensusFinder::new(None, None);
+
+        rpcs.process_block_from_rpc(
+            &authorization,
+            &mut connection_heads,
+            Some(block_1.clone()),
+            mock_geth.clone(),
+            &None,
+        )
+        .await
+        .unwrap();
+
+        rpcs.process_block_from_rpc(
+            &authorization,
+            &mut connection_heads,
+            Some(block_2.clone()),
+            mock_erigon_archive.clone(),
+            &None,
+        )
+        .await
+        .unwrap();
+
+        assert_eq!(rpcs.num_synced_rpcs(), 1);
+
+        // best_synced_backend_connection requires servers to be synced with the head block
+        // TODO: test with and without passing the head_block.number?
+        let head_connections = rpcs
+            .all_connections(&authorization, Some(block_2.number()), None, None, false)
+            .await;
+
+        debug!("head_connections: {:#?}", head_connections);
+
+        assert_eq!(
+            head_connections.unwrap().len(),
+            1,
+            "wrong number of connections"
+        );
+
+        let all_connections = rpcs
+            .all_connections(&authorization, Some(block_1.number()), None, None, false)
+            .await;
+
+        debug!("all_connections: {:#?}", all_connections);
+
+        assert_eq!(
+            all_connections.unwrap().len(),
+            2,
+            "wrong number of connections"
+        )
     }
 }