1 files changed, 16 insertions, 2 deletions
diff --git a/library/cpp/yaml/fyamlcpp/fyamlcpp_ut.cpp b/library/cpp/yaml/fyamlcpp/fyamlcpp_ut.cpp
index 2f6e14138c..67e918a297 100644
--- a/library/cpp/yaml/fyamlcpp/fyamlcpp_ut.cpp
+++ b/library/cpp/yaml/fyamlcpp/fyamlcpp_ut.cpp
@@ -31,7 +31,7 @@ config: b
 )";
             UNIT_ASSERT_EXCEPTION_CONTAINS(
                 NFyaml::TDocument::Parse(yaml),
-                yexception,
+                NFyaml::TFyamlEx,
                 "3:1 duplicate key");
         }
 
@@ -42,9 +42,23 @@ anchor: *does_not_exists
             auto doc = NFyaml::TDocument::Parse(yaml);
             UNIT_ASSERT_EXCEPTION_CONTAINS(
                 doc.Resolve(),
-                yexception,
+                NFyaml::TFyamlEx,
                 "2:10 invalid alias");
         }
+        {
+            const char *yaml = R"(
+a: 1
+a: 2
+a: 3
+)";
+            try {
+                NFyaml::TDocument::Parse(yaml);
+                UNIT_FAIL("exception must've happend");
+            } catch (NFyaml::TFyamlEx e) {
+                UNIT_ASSERT(TString(e.what()).Contains("3:1 duplicate key"));
+                UNIT_ASSERT(e.Errors().ysize() == 1);
+            }
+        }
     }
 
     Y_UNIT_TEST(Out) {