diff --git a/pkgs/development/interpreters/python/cpython/default.nix b/pkgs/development/interpreters/python/cpython/default.nix
index 8bc5c6c586d8..8e13ed51bc74 100644
--- a/pkgs/development/interpreters/python/cpython/default.nix
+++ b/pkgs/development/interpreters/python/cpython/default.nix
@@ -584,7 +584,9 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
       nativeBuildInputs = with pkgsBuildBuild.python3.pkgs; [ sphinxHook python-docs-theme ];
     };
 
-    tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+    tests = passthru.tests // {
+      pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+    };
   };
 
   enableParallelBuilding = true;