diff --git a/ydb/library/yql/parser/pg_wrapper/ut/arrow_ut.cpp b/ydb/library/yql/parser/pg_wrapper/ut/arrow_ut.cpp
index 28caad945d52..2ff79b30e739 100644
--- a/ydb/library/yql/parser/pg_wrapper/ut/arrow_ut.cpp
+++ b/ydb/library/yql/parser/pg_wrapper/ut/arrow_ut.cpp
@@ -10,6 +10,28 @@ extern "C" {
 #include "utils/fmgrprotos.h"
 }
 
+namespace {
+
+void checkResult(const char ** expected, std::shared_ptr<arrow::ArrayData> data) {
+
+    NYql::NUdf::TStringBlockReader<arrow::BinaryType, true> reader;
+    for (int i = 0; i < data->length; i++) {
+        auto item = reader.GetItem(*data, i);
+        if (!item) {
+            UNIT_ASSERT(expected[i] == nullptr);
+        } else {
+            const char* addr = item.AsStringRef().Data() + sizeof(void*);
+            UNIT_ASSERT(expected[i] != nullptr);
+            UNIT_ASSERT_VALUES_EQUAL(
+                TString(DatumGetCString(DirectFunctionCall1(numeric_out, (Datum)addr))),
+                expected[i]
+            );
+        }
+    }
+}
+
+} // namespace {
+
 namespace NYql {
 
 Y_UNIT_TEST_SUITE(TArrowUtilsTests) {
@@ -49,25 +71,14 @@ Y_UNIT_TEST(PgConvertNumericDouble) {
 
     auto result = PgConvertNumeric<double>(array);
     const auto& data = result->data();
+    
+
 
     const char* expected[] = {
         "1.1", "31.37", nullptr, "-1.337", "0"
     };
-    
-    NUdf::TStringBlockReader<arrow::BinaryType, true> reader;
-    for (int i = 0; i < 5; i++) {
-        auto item = reader.GetItem(*data, i);
-        if (!item) {
-            UNIT_ASSERT(expected[i] == nullptr);
-        } else {
-            const char* addr = item.AsStringRef().Data() + sizeof(void*);
-            UNIT_ASSERT(expected[i] != nullptr);
-            UNIT_ASSERT_VALUES_EQUAL(
-                TString(DatumGetCString(DirectFunctionCall1(numeric_out, (Datum)addr))),
-                expected[i]
-            );
-        }
-    }
+
+    checkResult(expected, data);
 }
 
 Y_UNIT_TEST(PgConvertNumericInt) {
@@ -89,21 +100,8 @@ Y_UNIT_TEST(PgConvertNumericInt) {
     const char* expected[] = {
         "11", "3137", nullptr, "-1337", "0"
     };
-    
-    NUdf::TStringBlockReader<arrow::BinaryType, true> reader;
-    for (int i = 0; i < 5; i++) {
-        auto item = reader.GetItem(*data, i);
-        if (!item) {
-            UNIT_ASSERT(expected[i] == nullptr);
-        } else {
-            const char* addr = item.AsStringRef().Data() + sizeof(void*);
-            UNIT_ASSERT(expected[i] != nullptr);
-            UNIT_ASSERT_VALUES_EQUAL(
-                TString(DatumGetCString(DirectFunctionCall1(numeric_out, (Datum)addr))),
-                expected[i]
-            );
-        }
-    }
+
+    checkResult(expected, data);
 }
 
 Y_UNIT_TEST(PgConvertDate32Date) {
@@ -150,5 +148,4 @@ Y_UNIT_TEST(PgConvertDate32Date) {
 
 } // Y_UNIT_TEST_SUITE(TArrowUtilsTests)
 
-} // namespace NYql
-
+} // namespace NYql
\ No newline at end of file