diff --git a/src/test/ui/deriving/deriving-all-codegen.rs b/src/test/ui/deriving/deriving-all-codegen.rs
index 028ed9c2305..8c7aa4be050 100644
--- a/src/test/ui/deriving/deriving-all-codegen.rs
+++ b/src/test/ui/deriving/deriving-all-codegen.rs
@@ -66,3 +66,11 @@ enum Fielded {
     Y(bool),
     Z(Option<i32>),
 }
+
+// A union. Most builtin traits are not derivable for unions.
+#[derive(Clone, Copy)]
+pub union Union {
+    pub b: bool,
+    pub u: u32,
+    pub i: i32,
+}
diff --git a/src/test/ui/deriving/deriving-all-codegen.stdout b/src/test/ui/deriving/deriving-all-codegen.stdout
index c24ed4237b8..db6fb47d722 100644
--- a/src/test/ui/deriving/deriving-all-codegen.stdout
+++ b/src/test/ui/deriving/deriving-all-codegen.stdout
@@ -1020,3 +1020,21 @@ impl ::core::cmp::Ord for Fielded {
         }
     }
 }
+
+// A union. Most builtin traits are not derivable for unions.
+pub union Union {
+    pub b: bool,
+    pub u: u32,
+    pub i: i32,
+}
+#[automatically_derived]
+#[allow(unused_qualifications)]
+impl ::core::clone::Clone for Union {
+    #[inline]
+    fn clone(&self) -> Union {
+        { let _: ::core::clone::AssertParamIsCopy<Self>; *self }
+    }
+}
+#[automatically_derived]
+#[allow(unused_qualifications)]
+impl ::core::marker::Copy for Union { }