To get the CK_DEFAULT_TIMEOUT defined for all tests
https://bugzilla.gnome.org/show_bug.cgi?id=761472
GST_REGISTRY_1_0=$(CHECK_REGISTRY)
# GST_PLUGINS_XYZ_DIR is only set in an uninstalled setup
-AM_TESTS_ENVIRONMENT = \
+AM_TESTS_ENVIRONMENT += \
$(REGISTRY_ENVIRONMENT) \
GST_PLUGIN_SYSTEM_PATH_1_0= \
GST_PLUGIN_PATH_1_0=$(top_builddir)/gst:$(top_builddir)/sys:$(top_builddir)/ext:$(GST_PLUGINS_LIBAV_DIR):$(GST_PLUGINS_UGLY_DIR):$(GST_PLUGINS_GOOD_DIR):$(GST_PLUGINS_BASE_DIR):$(GST_PLUGINS_DIR) \