This patch comes from Debian.

https://bugzilla.gnome.org/show_bug.cgi?id=771052
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=835737

--- gcr-3.20.0.old/gcr/test-gnupg-collection.c	2017-06-29 14:26:33.810838197 -0400
+++ gcr-3.20.0/gcr/test-gnupg-collection.c	2017-06-30 17:25:09.149383067 -0400
@@ -115,6 +115,14 @@

	g_object_unref (test->collection);

+	/* remove potential gpg 2.1 extras, ignore any errors. */
+	cmd = g_strdup_printf ("rm -rf %s/*.d", test->directory);
+	system(cmd);
+	g_free(cmd);
+	cmd = g_strdup_printf ("rm -f %s/.gpg-v21-migrated", test->directory);
+	system(cmd);
+	g_free(cmd);
+
	cmd = g_strdup_printf ("rm -f %s/*", test->directory);
	g_spawn_check_exit_status (system (cmd), &error);
	g_assert_no_error (error);
@@ -202,7 +210,7 @@
	GcrGnupgKey *key;

	_gcr_gnupg_collection_load_async (test->collection, NULL, on_async_ready, test);
-	egg_test_wait_until (500);
+	egg_test_wait_until (2500);
	g_assert (test->result);
	_gcr_gnupg_collection_load_finish (test->collection, test->result, &error);
	g_assert_no_error (error);