diff --git a/pkgs/development/tools/parsing/re2c/default.nix b/pkgs/development/tools/parsing/re2c/default.nix
index 41ec653a409..02be14908e4 100644
--- a/pkgs/development/tools/parsing/re2c/default.nix
+++ b/pkgs/development/tools/parsing/re2c/default.nix
@@ -4,6 +4,11 @@
 , autoreconfHook
 , nix-update-script
 , python3
+
+# for passthru.tests
+, ninja
+, php
+, spamassassin
 }:
 
 stdenv.mkDerivation rec {
@@ -33,6 +38,9 @@ stdenv.mkDerivation rec {
     updateScript = nix-update-script {
       attrPath = pname;
     };
+    tests = {
+      inherit ninja php spamassassin;
+    };
   };
 
   meta = with lib; {