diff --git a/yaml_shellcheck.py b/yaml_shellcheck.py
index f19b638..0f468bd 100755
--- a/yaml_shellcheck.py
+++ b/yaml_shellcheck.py
@@ -94,7 +94,7 @@ def get_scripts(data, path):
             isinstance(data, str)
             or isinstance(data, int)
             or isinstance(data, float)
-            or isinstance(data, None)
+            or data is None
         ):
             pass
         return results
@@ -145,7 +145,7 @@ def get_runs(data, path):
             isinstance(data, str)
             or isinstance(data, int)
             or isinstance(data, float)
-            or isinstance(data, None)
+            or data is None
         ):
             pass
         return results