1 files changed, 8 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/double_neg.rs b/src/tools/clippy/tests/ui/double_neg.rs
new file mode 100644
index 000000000..38a8fbd74
--- /dev/null
+++ b/src/tools/clippy/tests/ui/double_neg.rs
@@ -0,0 +1,8 @@
+#[warn(clippy::double_neg)]
+#[allow(clippy::no_effect)]
+fn main() {
+    let x = 1;
+    -x;
+    -(-x);
+    --x;
+}