diff -r 8949af6a4279 -r 1c0884f5506e tests/subfiles.py
--- a/tests/subfiles.py	Sat Jun 08 01:42:48 2019 +0300
+++ b/tests/subfiles.py	Sat Jun 08 01:51:50 2019 +0300
@@ -12,7 +12,7 @@
     library_standards.read_file(file)
 
 @problem_type('zero-determinant',
-    severity = 'error',
+    severity = 'hold',
     message = 'matrix row or column all zero'
 )
 def determinant_test(model):
@@ -59,7 +59,7 @@
 }
 
 @problem_type('illegal-scaling',
-    severity = 'error',
+    severity = 'hold',
     message = lambda primitive, scaling, axes:
         str.format('scaling of unscalable primitive {} ({})',
             primitive,
@@ -103,28 +103,28 @@
             )
 
 @problem_type('cyclical-reference',
-    severity = 'error',
+    severity = 'hold',
     message = lambda chain:
         str.format('cyclical subfile dependency: {chain}',
             **locals(),
         ),
 )
 @problem_type('bad-subfile',
-    severity = 'error',
+    severity = 'hold',
     message = lambda path, problem_text:
         str.format('cannot process subfile "{path}": {problem_text}',
             **locals(),
         ),
 )
 @problem_type('moved-file-used',
-    severity = 'error',
+    severity = 'hold',
     message = lambda moved_file, new_file:
         str.format('subfile "{moved_file}" has been moved to "{new_file}"',
             **locals(),
         ),
 )
 @problem_type('unnecessary-scaling',
-    severity = 'notice',
+    severity = 'warning',
     message = lambda scaled_flat_dimensions, scaling_vector:
         str.format(
             'subfile unnecessarily scaled in the {dims} ({scaling})',