diff --git a/integration-tests/tests/cpprefs_test.rs b/integration-tests/tests/cpprefs_test.rs
index 4241dec..9cc6d39 100644
--- a/integration-tests/tests/cpprefs_test.rs
+++ b/integration-tests/tests/cpprefs_test.rs
@@ -13,6 +13,10 @@
 use proc_macro2::TokenStream;
 use quote::quote;
 
+const fn arbitrary_self_types_supported() -> bool {
+    rustversion::cfg!(nightly)
+}
+
 /// A positive test, we expect to pass.
 fn run_cpprefs_test(
     cxx_code: &str,
@@ -21,6 +25,10 @@
     generate: &[&str],
     generate_pods: &[&str],
 ) {
+    if !arbitrary_self_types_supported() {
+        // "unsafe_references_wrapped" requires arbitrary_self_types, which requires nightly.
+        return;
+    }
     do_run_test(
         cxx_code,
         header_code,
@@ -30,6 +38,9 @@
         None,
         None,
         "unsafe_references_wrapped",
+        Some(quote! {
+            #![feature(arbitrary_self_types)]
+        }),
     )
     .unwrap()
 }
@@ -54,7 +65,7 @@
     "},
         quote! {
             let goat = ffi::Goat::new().within_unique_ptr();
-            let mut goat = ffi::CppUniquePtrPin::new(goat);
+            let mut goat = autocxx::CppUniquePtrPin::new(goat);
             goat.as_cpp_mut_ref().add_a_horn();
         },
         &["Goat"],
@@ -87,7 +98,7 @@
     "},
         quote! {
             let goat = ffi::Goat::new().within_unique_ptr();
-            let goat = ffi::cpp_pin_uniqueptr(goat);
+            let goat = autocxx::CppUniquePtrPin::new(goat);
             goat.as_cpp_ref().describe();
         },
         &["Goat"],