diff --git a/xtest/test_regrtest.py b/xtest/test_regrtest.py
index c32623e1..39653694 100644
--- a/xtest/test_regrtest.py
+++ b/xtest/test_regrtest.py
@@ -128,4 +128,4 @@ def test_regrtest(test_case):
 
 
 if __name__ == '__main__':
-    exit(manifest.verify())
+    sys.exit(manifest.verify())
diff --git a/xtest/test_unparse_env.py b/xtest/test_unparse_env.py
index 14861f34..0348195c 100644
--- a/xtest/test_unparse_env.py
+++ b/xtest/test_unparse_env.py
@@ -14,7 +14,7 @@ def gather_files():
     print('Interpreter version: ', sys.version_info)
     print('sys.path: ', sys.path)
     for sys_path in sys.path:
-        for subdir, dirs, files in os.walk(sys_path):
+        for subdir, _dirs, files in os.walk(sys_path):
             for file in filter(lambda f: f.endswith('.py'), [os.path.join(subdir, file) for file in files]):
                 yield file