diff --git a/tests/ui/liveness/unused-assignments-match-guard-issue-80954.rs b/tests/ui/liveness/unused-assignments-match-guard-issue-80954.rs
new file mode 100644
index 0000000000000..0093eacc31f14
--- /dev/null
+++ b/tests/ui/liveness/unused-assignments-match-guard-issue-80954.rs
@@ -0,0 +1,24 @@
+// Regression test for https://github.com/rust-lang/rust/issues/80954
+// Rustc diagnostics should recognize that
+// the assignment to 'x' and 'n' are being used
+//@ check-pass
+
+fn main() {
+    let mut x = 0;
+    match () {
+        () if {
+            x = 42;
+            false
+        } => {}
+        _ => {
+            println!("{}", x);
+        }
+    }
+
+    let mut n = 0;
+    match 0 {
+        | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ if
+        { println!("{}", n); n += 1; false } => {}
+        _ => {}
+    }
+}