diff --git a/tests/test_signal.py b/tests/test_signal.py
index 9ae499d..de25d25 100644
--- a/tests/test_signal.py
+++ b/tests/test_signal.py
@@ -362,6 +362,7 @@ class CM(GObject.GObject):
         test_string=(GObject.SignalFlags.RUN_LAST, str, (str,)),
         test_object=(GObject.SignalFlags.RUN_LAST, object, (object,)),
         test_paramspec=(GObject.SignalFlags.RUN_LAST, GObject.ParamSpec, ()),
+        test_paramspec_in=(GObject.SignalFlags.RUN_LAST, GObject.ParamSpec, (GObject.ParamSpec, )),
         test_gvalue=(GObject.SignalFlags.RUN_LAST, GObject.Value, (GObject.Value,)),
         test_gvalue_ret=(GObject.SignalFlags.RUN_LAST, GObject.Value, (GObject.TYPE_GTYPE,)),
     )
@@ -418,6 +419,15 @@ class _TestCMarshaller:
         self.assertEqual(rv.name, "test-param")
         self.assertEqual(rv.nick, "test")
 
+    def test_paramspec_in(self):
+        rv = GObject.param_spec_boolean('mybool', 'test-bool', 'do something',
+                                        True, GObject.ParamFlags.READABLE)
+
+        rv2 = self.obj.emit("test-paramspec-in", rv)
+        self.assertEqual(type(rv), type(rv2))
+        self.assertEqual(rv2.name, "mybool")
+        self.assertEqual(rv2.nick, "test-bool")
+
     def test_C_paramspec(self):
         self.notify_called = False
 
diff --git a/tests/testhelpermodule.c b/tests/testhelpermodule.c
index d82a3c2..9ca82bc 100644
--- a/tests/testhelpermodule.c
+++ b/tests/testhelpermodule.c
@@ -402,6 +402,15 @@ test_gvalue_ret_callback (GObject *object, GType type)
   return ret;
 }
 
+static GParamSpec *
+test_paramspec_in_callback (GObject *object, GParamSpec *p)
+{
+  g_return_val_if_fail (G_IS_OBJECT (object), NULL);
+  g_return_val_if_fail (G_IS_PARAM_SPEC (p), NULL);
+
+  return p;
+}
+
 static void
 connectcallbacks (GObject *object)
 {
@@ -460,6 +469,10 @@ connectcallbacks (GObject *object)
                     "test_gvalue_ret",
                     G_CALLBACK (test_gvalue_ret_callback), 
                     NULL);
+  g_signal_connect (G_OBJECT (object),
+                    "test_paramspec_in",
+                    G_CALLBACK (test_paramspec_in_callback), 
+                    NULL);
 }
 
 static PyObject *
