diff --git a/crates/ra_ide/src/diagnostics.rs b/crates/ra_ide/src/diagnostics.rs
index d97bde939ea..5ce900bf4de 100644
--- a/crates/ra_ide/src/diagnostics.rs
+++ b/crates/ra_ide/src/diagnostics.rs
@@ -869,6 +869,6 @@ struct Foo {
 
     #[test]
     fn test_disabled_diagnostics() {
-        check_disabled_diagnostics(r#"mod foo;"#, &vec!["unresolved-module"]);
+        check_disabled_diagnostics(r#"mod foo;"#, &["unresolved-module"]);
     }
 }