diff --git a/analysis/tests/lighttpd-minimal/src/main.rs b/analysis/tests/lighttpd-minimal/src/main.rs
index 6de97596e0..47e81d4f79 100644
--- a/analysis/tests/lighttpd-minimal/src/main.rs
+++ b/analysis/tests/lighttpd-minimal/src/main.rs
@@ -1,3 +1,4 @@
+#![feature(rustc_private)]
 #![allow(non_camel_case_types)]
 #![allow(dead_code)]
 #![allow(unused_mut)]
diff --git a/analysis/tests/lighttpd/src/main.rs b/analysis/tests/lighttpd/src/main.rs
index ee3e9f0163..8f34b6c935 100644
--- a/analysis/tests/lighttpd/src/main.rs
+++ b/analysis/tests/lighttpd/src/main.rs
@@ -1,3 +1,4 @@
+#![feature(rustc_private)]
 #![allow(non_upper_case_globals)]
 #![allow(non_camel_case_types)]
 #![allow(dead_code)]
diff --git a/analysis/tests/misc/src/main.rs b/analysis/tests/misc/src/main.rs
index 3657dc0be8..c03e368d00 100644
--- a/analysis/tests/misc/src/main.rs
+++ b/analysis/tests/misc/src/main.rs
@@ -1,3 +1,4 @@
+#![feature(rustc_private)]
 #![feature(c_variadic)]
 
 #[path = "pointers.rs"]