diff --git a/selftests/functional/basic.py b/selftests/functional/basic.py
index 9e53e4d832..cf47d72f10 100644
--- a/selftests/functional/basic.py
+++ b/selftests/functional/basic.py
@@ -830,7 +830,9 @@ def check_matplotlib_logs(file_path):
             self.assertTrue(os.path.exists(file_path))
             with open(file_path, encoding="utf-8") as file:
                 stream = file.read()
-                self.assertIn("matplotlib __init__         L0337 DEBUG|", stream)
+                self.assertTrue(
+                    re.match(r"matplotlib __init__         L[0-9]* DEBUG|", stream)
+                )
 
         log_dir = os.path.join(self.tmpdir.name, "latest")
         test_log_dir = os.path.join(