1 files changed, 13 insertions, 1 deletions
diff --git a/src/tools/clippy/tests/ui/needless_collect.rs b/src/tools/clippy/tests/ui/needless_collect.rs
index 535ec8298..680b6fa5b 100644
--- a/src/tools/clippy/tests/ui/needless_collect.rs
+++ b/src/tools/clippy/tests/ui/needless_collect.rs
@@ -1,4 +1,4 @@
-// run-rustfix
+//@run-rustfix
 
 #![allow(unused, clippy::suspicious_map, clippy::iter_count)]
 
@@ -62,4 +62,16 @@ fn main() {
 
     let _ = sample.iter().collect::<VecWrapper<_>>().is_empty();
     let _ = sample.iter().collect::<VecWrapper<_>>().contains(&&0);
+
+    #[allow(clippy::double_parens)]
+    {
+        Vec::<u8>::new().extend((0..10).collect::<Vec<_>>());
+        foo((0..10).collect::<Vec<_>>());
+        bar((0..10).collect::<Vec<_>>(), (0..10).collect::<Vec<_>>());
+        baz((0..10), (), ('a'..='z').collect::<Vec<_>>())
+    }
 }
+
+fn foo(_: impl IntoIterator<Item = usize>) {}
+fn bar<I: IntoIterator<Item = usize>>(_: Vec<usize>, _: I) {}
+fn baz<I: IntoIterator<Item = usize>>(_: I, _: (), _: impl IntoIterator<Item = char>) {}