diff --git a/pkgs/development/compilers/rust/cargo.nix b/pkgs/development/compilers/rust/cargo.nix
index 1bc1777acd47..ff0ecf45fd23 100644
--- a/pkgs/development/compilers/rust/cargo.nix
+++ b/pkgs/development/compilers/rust/cargo.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage.override {
 
   passthru = {
     rustc = rustc;
-    inherit (rustc) tests;
+    inherit (rustc.unwrapped) tests;
   };
 
   # Upstream rustc still assumes that musl = static[1].  The fix for