tests: [nfc] use more modern 'pathlib' in #1902

diff --git a/rtest/test_regression.py b/rtest/test_regression.py
index 43a62646b750cf6d1a990e54d5bfc78632665ab5..39eeea5f8d08c768ce80ec2124849e3dd97c23d7 100644 (file)
--- a/rtest/test_regression.py
+++ b/rtest/test_regression.py
@@ -799,8 +799,8 @@ def test_1902():
   '''
 
   # locate our associated test case in this directory
-  input = os.path.join(os.path.dirname(__file__), '1902.dot')
-  assert os.path.exists(input), 'unexpectedly missing test case'
+  input = Path(__file__).parent / '1902.dot'
+  assert input.exists(), 'unexpectedly missing test case'
 
   # ask Graphviz to process it, which should generate a segfault if this bug
   # has been reintroduced