diff --git a/gobject/tests/param.c b/gobject/tests/param.c
index 160eff4c3..9d22135cc 100644
--- a/gobject/tests/param.c
+++ b/gobject/tests/param.c
@@ -1397,6 +1397,13 @@ test_param_implement (void)
 {
   gchar *test_path;
 
+  /* This test is slow. */
+  if (!g_test_slow ())
+    {
+      g_test_skip ("Skipping slow /param/implement test");
+      return;
+    }
+
   for (change_this_flag = 0; change_this_flag < 16; change_this_flag++)
     for (change_this_type = 0; change_this_type < 3; change_this_type++)
       for (use_this_flag = 0; use_this_flag < 16; use_this_flag++)
@@ -1658,8 +1665,7 @@ main (int argc, char *argv[])
   g_test_add_func ("/param/validate", test_param_validate);
   g_test_add_func ("/param/convert", test_param_convert);
 
-  if (g_test_slow ())
-    g_test_add_func ("/param/implement", test_param_implement);
+  g_test_add_func ("/param/implement", test_param_implement);
 
   for (data.change_this_flag = 0; data.change_this_flag < 16; data.change_this_flag++)
     for (data.change_this_type = 0; data.change_this_type < 3; data.change_this_type++)