1 files changed, 12 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/build-support/fetchfirefoxaddon/tests.nix b/nixpkgs/pkgs/build-support/fetchfirefoxaddon/tests.nix
index d125be196aff..c407d0e74b82 100644
--- a/nixpkgs/pkgs/build-support/fetchfirefoxaddon/tests.nix
+++ b/nixpkgs/pkgs/build-support/fetchfirefoxaddon/tests.nix
@@ -1,4 +1,4 @@
-{ invalidateFetcherByDrvHash, fetchFirefoxAddon, ... }:
+{ invalidateFetcherByDrvHash, fetchFirefoxAddon, fetchurl, ... }:
 
 {
   simple = invalidateFetcherByDrvHash fetchFirefoxAddon {
@@ -7,4 +7,15 @@
     url = "https://addons.mozilla.org/firefox/downloads/file/3059971/image_search_options-3.0.12-fx.xpi";
     sha256 = "sha256-H73YWX/DKxvhEwKpWOo7orAQ7c/rQywpljeyxYxv0Gg=";
   };
+  overidden-source =
+    let
+      image-search-options = fetchurl {
+        url = "https://addons.mozilla.org/firefox/downloads/file/3059971/image_search_options-3.0.12-fx.xpi";
+        sha256 = "sha256-H73YWX/DKxvhEwKpWOo7orAQ7c/rQywpljeyxYxv0Gg=";
+      };
+    in
+    invalidateFetcherByDrvHash fetchFirefoxAddon {
+      name = "image-search-options";
+      src = image-search-options;
+    };
 }