diff --git a/tests/ui/attributes/unsafe/cfg-unsafe-attributes.rs b/tests/ui/attributes/unsafe/cfg-unsafe-attributes.rs
new file mode 100644
index 00000000000..ce365d1a8b1
--- /dev/null
+++ b/tests/ui/attributes/unsafe/cfg-unsafe-attributes.rs
@@ -0,0 +1,7 @@
+//@ build-pass
+#![feature(unsafe_attributes)]
+
+#[cfg_attr(all(), unsafe(no_mangle))]
+fn a() {}
+
+fn main() {}
diff --git a/tests/ui/attributes/unsafe/unsafe-attributes.rs b/tests/ui/attributes/unsafe/unsafe-attributes.rs
new file mode 100644
index 00000000000..e7620a18048
--- /dev/null
+++ b/tests/ui/attributes/unsafe/unsafe-attributes.rs
@@ -0,0 +1,7 @@
+//@ build-pass
+#![feature(unsafe_attributes)]
+
+#[unsafe(no_mangle)]
+fn a() {}
+
+fn main() {}