diff --git a/src/test/ui/anon-params-denied-2018.rs b/src/test/ui/anon-params-denied-2018.rs
new file mode 100644
index 0000000000000..1489cccc5fbb9
--- /dev/null
+++ b/src/test/ui/anon-params-denied-2018.rs
@@ -0,0 +1,13 @@
+// Test that anonymous parameters are disallowed in 2018 edition.
+
+// edition:2018
+
+trait T {
+    fn foo(i32); //~ ERROR expected identifier
+
+    fn bar_with_default_impl(String, String) {}
+    //~^ ERROR expected identifier
+    //~| ERROR expected identifier
+}
+
+fn main() {}