diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 36b47b8..443cd98 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -33,6 +33,7 @@ test:
     - matplotlib-base
   commands:
     - pip check
+    # skip tests that require 'railroad', unavailable
     - pytest -vv . --ignore=tests/test_diagram.py -k "not (TestExamples or Test02_WithoutPackrat or Test04_WithPackrat or Test06_WithBoundedPackrat or Test08_WithUnboundedPackrat or Test09_WithLeftRecursionParsing or Test10_WithLeftRecursionParsingBoundedMemo)"
 
 about: