diff --git a/colorlog/tests/test_colorlog.py b/colorlog/tests/test_colorlog.py
index db9d46c..82d6b6e 100644
--- a/colorlog/tests/test_colorlog.py
+++ b/colorlog/tests/test_colorlog.py
@@ -17,7 +17,7 @@ def test_custom_colors(create_and_test_logger):
 
 
 def test_reset(create_and_test_logger):
-    create_and_test_logger(reset=True, validator=lambda l: l.endswith("\x1b[0m"))
+    create_and_test_logger(reset=True, validator=lambda line: line.endswith("\x1b[0m"))
 
 
 def test_no_reset(create_and_test_logger):
diff --git a/colorlog/tests/test_config.py b/colorlog/tests/test_config.py
index e6f281f..332dcf4 100644
--- a/colorlog/tests/test_config.py
+++ b/colorlog/tests/test_config.py
@@ -12,7 +12,7 @@ def path(filename):
 
 def test_build_from_file(test_logger):
     logging.config.fileConfig(path("test_config.ini"))
-    test_logger(logging.getLogger(), lambda l: ":test_config.ini" in l)
+    test_logger(logging.getLogger(), lambda line: ":test_config.ini" in line)
 
 
 def test_build_from_dictionary(test_logger):
@@ -40,4 +40,4 @@ def test_build_from_dictionary(test_logger):
             },
         }
     )
-    test_logger(logging.getLogger(), lambda l: ":dict" in l)
+    test_logger(logging.getLogger(), lambda line: ":dict" in line)