use slightly more idiomatic api for cfg

1 files changed, 2 insertions, 1 deletions

diff --git a/crates/ra_ide_api/src/lib.rs b/crates/ra_ide_api/src/lib.rs
index 24f1b91f6..2d92fe1c5 100644
--- a/crates/ra_ide_api/src/lib.rs
+++ b/crates/ra_ide_api/src/lib.rs
@@ -325,7 +325,8 @@ impl Analysis {
         let file_id = FileId(0);
         // FIXME: cfg options
         // Default to enable test for single file.
-        let cfg_options = CfgOptions::default().atom("test".into());
+        let mut cfg_options = CfgOptions::default();
+        cfg_options.insert_atom("test".into());
         crate_graph.add_crate_root(file_id, Edition::Edition2018, cfg_options);
         change.add_file(source_root, file_id, "main.rs".into(), Arc::new(text));
         change.set_crate_graph(crate_graph);