diff -r 2269739dd098 -r cd42b426028b tests/tools/check_source.sh
--- a/tests/tools/check_source.sh	Thu Sep 28 16:25:05 2017 +0300
+++ b/tests/tools/check_source.sh	Thu Sep 28 17:20:31 2017 +0300
@@ -205,8 +205,9 @@
     enable=$enable,E1601          # print statement used
     enable=$enable,C0325          # (superfluous-parens) Unnecessary parens after keyword    
     enable=$enable,W0404          # reimported module    
-    enable=$enable,C0411          # (wrong-import-order), standard import "import x" comes before "import y"
-    enable=$enable,W0108          # (unnecessary-lambda), Lambda may not be necessary
+    enable=$enable,C0411          # (wrong-import-order) standard import "import x" comes before "import y"
+    enable=$enable,W0108          # (unnecessary-lambda) Lambda may not be necessary
+    enable=$enable,C0412          # (ungrouped-imports) Imports from package X are not grouped
 
     # enable=$enable,W0403        # relative import
     # enable=$enable,W0622        # (redefined-builtin) Redefining built-in