1 files changed, 3 insertions, 2 deletions
diff --git a/library/python/testing/yatest_common/yatest/common/runtime.py b/library/python/testing/yatest_common/yatest/common/runtime.py
index 4f67f824328..e3013e1d4d0 100644
--- a/library/python/testing/yatest_common/yatest/common/runtime.py
+++ b/library/python/testing/yatest_common/yatest/common/runtime.py
@@ -464,14 +464,15 @@ class Context(object):
         return _get_ya_plugin_instance().get_context("retry_index")
 
     @property
-    @default_value(False)
+    @default_value(None)
     def sanitize(self):
         """
         Detect if current test run is under sanitizer
 
         :return: one of `None`, 'address', 'memory', 'thread', 'undefined'
         """
-        return _get_ya_plugin_instance().get_context("sanitize")
+        value = _get_ya_plugin_instance().get_context("sanitize")
+        return value if value else None
 
     @property
     @default_value(lambda _: {})