diff --git a/tests/nix-copy-closure.nix b/tests/nix-copy-closure.nix
index ca09dffac2..66c19a45d4 100644
--- a/tests/nix-copy-closure.nix
+++ b/tests/nix-copy-closure.nix
@@ -2,7 +2,7 @@
 
 { system, nix }:
 
-with import <nixos/lib/testing.nix> { inherit system; };
+with import <nixpkgs/nixos/lib/testing.nix> { inherit system; };
 
 makeTest ({ pkgs, ... }: let pkgA = pkgs.aterm; pkgB = pkgs.wget; in {
 
diff --git a/tests/remote-builds.nix b/tests/remote-builds.nix
index 6d38fb5680..56514e1749 100644
--- a/tests/remote-builds.nix
+++ b/tests/remote-builds.nix
@@ -2,7 +2,7 @@
 
 { system, nix }:
 
-with import <nixos/lib/testing.nix> { inherit system; };
+with import <nixpkgs/nixos/lib/testing.nix> { inherit system; };
 
 makeTest ({ pkgs, ... }: