relative paths to tests

tests/PyPlamlTest.py

@@ -25,7 +25,7 @@ class PyPlamlTest(unittest.TestCase):
                 self.assertTrue(False, f"Parser exception in {example_file}")
 
     def test_drawing(self):
-        main_script = Path(__file__).parent.parent / 'main.py'
+        main_script = pathlib.Path(__file__).parent.parent / 'main.py'
 
         for e in self.examples_sorted:
             self.assertEqual(