diff -r 2e8bf28a8909 -r 07f48018b6f5 tests/tools/check_source.sh
--- a/tests/tools/check_source.sh	Thu Oct 04 12:09:23 2018 +0300
+++ b/tests/tools/check_source.sh	Thu Oct 04 17:24:40 2018 +0300
@@ -357,6 +357,7 @@
     # python3 compatibility checks
     enable=$enable,W1648          # (bad-python3-import) Module moved in Python 3
     enable=$enable,W1613          # (xrange-builtin) xrange built-in referenced
+    enable=$enable,W1612          # (unicode-builtin) unicode built-in referenced
     # enable=
 
     options=