diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 5283b038e2a8..7d6b5c292628 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -6580,7 +6580,7 @@ let self = _self // overrides; _self = with self; {
       url = mirror://cpan/authors/id/R/RO/ROKR/Hash-Merge-Simple-0.051.tar.gz;
       sha256 = "1c56327873d2f04d5722777f044863d968910466997740d55a754071c6287b73";
     };
-    buildInputs = [ TestMost ];
+    buildInputs = [ TestDeep TestDifferences TestException TestMost TestWarn ];
     propagatedBuildInputs = [ Clone ];
     meta = {
       description = "Recursively merge two or more hashes, simply";