tests: fix path from which to import 'gvtest'

This has been wrong since 0e19cdb9bff60fdeb1942f5dca677db9d8a24062 removed the
rtest directory. And yet the tests in this file somehow still run correctly in
CI. I can only guess that insufficient test isolation under Pytest results in
some other test file putting the correct path in `sys.path` prior to this file
being processed.

diff --git a/tests/regression_tests/large/test_large_graphs.py b/tests/regression_tests/large/test_large_graphs.py
index 7c7741605c705b801cb98cb6850bb9a649704b00..bb32196c6f9801563ddd11af7e7a2db1e4a34c1f 100644 (file)
--- a/tests/regression_tests/large/test_large_graphs.py
+++ b/tests/regression_tests/large/test_large_graphs.py
@@ -9,7 +9,7 @@ import subprocess
 import sys
 import pytest
 
-sys.path.append(os.path.join(os.path.dirname(__file__), "../../../rtest"))
+sys.path.append(os.path.join(os.path.dirname(__file__), "../../../tests"))
 from gvtest import dot #pylint: disable=wrong-import-position
 
 @pytest.mark.skipif(platform.system() == "Windows" and