diff --git a/docker_squash/cli.py b/docker_squash/cli.py
index 73e981d..c7c3ea8 100644
--- a/docker_squash/cli.py
+++ b/docker_squash/cli.py
@@ -50,7 +50,7 @@ def __init__(self):
 
         self.log = logging.getLogger()
         formatter = logging.Formatter(
-            "%(asctime)s %(name)-12s %(levelname)-8s %(message)s"
+            "%(asctime)s %(filename)s:%(lineno)-10s %(levelname)-5s %(message)s"
         )
 
         handler_out.setFormatter(formatter)
diff --git a/docker_squash/image.py b/docker_squash/image.py
index 35bf6ec..8f0c679 100644
--- a/docker_squash/image.py
+++ b/docker_squash/image.py
@@ -18,7 +18,6 @@
 
 
 class Chdir(object):
-
     """Context manager for changing the current working directory"""
 
     def __init__(self, newPath):
diff --git a/tests/test_integ_squash.py b/tests/test_integ_squash.py
index ff6cc17..73d7525 100644
--- a/tests/test_integ_squash.py
+++ b/tests/test_integ_squash.py
@@ -37,7 +37,9 @@ class IntegSquash(unittest.TestCase):
 
     log = logging.getLogger()
     handler = logging.StreamHandler()
-    formatter = logging.Formatter("%(asctime)s %(name)-12s %(levelname)-8s %(message)s")
+    formatter = logging.Formatter(
+        "%(asctime)s %(filename)s:%(lineno)-10s %(levelname)-5s %(message)s"
+    )
     handler.setFormatter(formatter)
     log.addHandler(handler)
     log.setLevel(logging.DEBUG)