diff --git a/tests/test_lightningd.py b/tests/test_lightningd.py
index dd9db76fe..ce020f459 100644
--- a/tests/test_lightningd.py
+++ b/tests/test_lightningd.py
@@ -153,7 +153,7 @@ class BaseLightningDTests(unittest.TestCase):
 
     def getValgrindErrors(self, node):
         for error_file in os.listdir(node.daemon.lightning_dir):
-            if not re.match("valgrind-errors.\d+", error_file):
+            if not re.fullmatch("valgrind-errors.\d+", error_file):
                 continue;
             with open(os.path.join(node.daemon.lightning_dir, error_file), 'r') as f:
                 errors = f.read().strip()