Remove deprecated --check-cfg names() and values() syntax
diff --git a/tests/ui/check-cfg/unexpected-cfg-value.stderr b/tests/ui/check-cfg/unexpected-cfg-value.stderr
new file mode 100644
index 0000000..31c473a
--- /dev/null
+++ b/tests/ui/check-cfg/unexpected-cfg-value.stderr
@@ -0,0 +1,21 @@
+warning: unexpected `cfg` condition value: `sedre`
+ --> $DIR/unexpected-cfg-value.rs:7:7
+ |
+LL | #[cfg(feature = "sedre")]
+ | ^^^^^^^^^^-------
+ | |
+ | help: there is a expected value with a similar name: `"serde"`
+ |
+ = note: expected values for `feature` are: `full`, `serde`
+ = note: `#[warn(unexpected_cfgs)]` on by default
+
+warning: unexpected `cfg` condition value: `rand`
+ --> $DIR/unexpected-cfg-value.rs:14:7
+ |
+LL | #[cfg(feature = "rand")]
+ | ^^^^^^^^^^^^^^^^
+ |
+ = note: expected values for `feature` are: `full`, `serde`
+
+warning: 2 warnings emitted
+
