diff --git a/pkgs/build-support/fetchurl/tests.nix b/pkgs/build-support/fetchurl/tests.nix
index fc7fb25e158f..e348d77db0bd 100644
--- a/pkgs/build-support/fetchurl/tests.nix
+++ b/pkgs/build-support/fetchurl/tests.nix
@@ -1,8 +1,8 @@
-{ invalidateFetcherByDrvHash, fetchurl, jq, moreutils, ... }: {
+{ testers, fetchurl, jq, moreutils, ... }: {
   # Tests that we can send custom headers with spaces in them
   header =
     let headerValue = "Test '\" <- These are some quotes";
-    in invalidateFetcherByDrvHash fetchurl {
+    in testers.invalidateFetcherByDrvHash fetchurl {
       url = "https://httpbin.org/headers";
       sha256 = builtins.hashString "sha256" (headerValue + "\n");
       curlOptsList = [ "-H" "Hello: ${headerValue}" ];