diff --git a/cheroot/test/test_ssl.py b/cheroot/test/test_ssl.py
index a084f4d447..900d39ed36 100644
--- a/cheroot/test/test_ssl.py
+++ b/cheroot/test/test_ssl.py
@@ -597,9 +597,9 @@ def test_https_over_http_error(http_server, ip_addr):
             ),
         ).request('GET', '/')
     expected_substring = (
-      'record layer failure' if IS_ABOVE_OPENSSL31
-      else 'wrong version number' if IS_ABOVE_OPENSSL10
-      else 'unknown protocol'
+        'record layer failure' if IS_ABOVE_OPENSSL31
+        else 'wrong version number' if IS_ABOVE_OPENSSL10
+        else 'unknown protocol'
     )
     assert expected_substring in ssl_err.value.args[-1]