diff --git a/tap_aggregator/src/server.rs b/tap_aggregator/src/server.rs
index f8f769d8..e73788c6 100644
--- a/tap_aggregator/src/server.rs
+++ b/tap_aggregator/src/server.rs
@@ -362,7 +362,7 @@ mod tests {
 
         // Start the JSON-RPC client.
         let client = HttpClientBuilder::default()
-            .build(format!("http://127.0.0.1:{}", local_addr.port()))
+            .build(format!("http://0.0.0.0:{}", local_addr.port()))
             .unwrap();
 
         // Create receipts