diff --git a/codex-rs/core/src/tools/handlers/extension_tools.rs b/codex-rs/core/src/tools/handlers/extension_tools.rs
index f03846db8e..4704d3e37c 100644
--- a/codex-rs/core/src/tools/handlers/extension_tools.rs
+++ b/codex-rs/core/src/tools/handlers/extension_tools.rs
@@ -188,10 +188,7 @@ mod tests {
     struct StubExtensionExecutor;
 
     impl codex_tool_api::ToolExecutor for StubExtensionExecutor {
-        fn execute(
-            &self,
-            _call: codex_tool_api::ToolCall,
-        ) -> codex_tool_api::ToolFuture {
+        fn execute(&self, _call: codex_tool_api::ToolCall) -> codex_tool_api::ToolFuture {
             Box::pin(async { Ok(json!({ "ok": true })) })
         }
     }