python3Packages.gevent: add some key reverse-dependencies to passthru.tests

pkgs/development/python-modules/gevent/default.nix

@@ -13,6 +13,12 @@
 , zope_event
 , zope_interface
 , pythonOlder
+
+# for passthru.tests
+, dulwich
+, gunicorn
+, opentracing
+, pika
 }:
 
 buildPythonPackage rec {
@@ -55,6 +61,14 @@ buildPythonPackage rec {
     "gevent.events"
   ];
 
+  passthru.tests = {
+    inherit
+      dulwich
+      gunicorn
+      opentracing
+      pika;
+  } // lib.filterAttrs (k: v: lib.hasInfix "gevent" k) python.pkgs;
+
   meta = with lib; {
     description = "Coroutine-based networking library";
     homepage = "http://www.gevent.org/";