diff --git a/src/DataTypes/tests/CMakeLists.txt b/src/DataTypes/tests/CMakeLists.txt
index e56dd166ea3..e69de29bb2d 100644
--- a/src/DataTypes/tests/CMakeLists.txt
+++ b/src/DataTypes/tests/CMakeLists.txt
@@ -1,5 +0,0 @@
-add_executable (data_types_number_fixed data_types_number_fixed.cpp)
-target_link_libraries (data_types_number_fixed PRIVATE dbms)
-
-add_executable (data_type_string data_type_string.cpp)
-target_link_libraries (data_type_string PRIVATE dbms)
diff --git a/src/DataTypes/tests/data_type_string.cpp b/src/DataTypes/tests/data_type_string.cpp
deleted file mode 100644
index bb394b1784c..00000000000
--- a/src/DataTypes/tests/data_type_string.cpp
+++ /dev/null
@@ -1,81 +0,0 @@
-#include <string>
-
-#include <iostream>
-#include <fstream>
-
-#include <Common/Stopwatch.h>
-
-#include <IO/ReadBufferFromFile.h>
-#include <IO/WriteBufferFromFile.h>
-#include <Columns/ColumnString.h>
-#include <DataTypes/DataTypeString.h>
-
-
-int main(int, char **)
-try
-{
-    using namespace DB;
-
-    Stopwatch stopwatch;
-    size_t n = 50000000;
-    const char * s = "";
-    size_t size = strlen(s) + 1;
-    DataTypeString data_type;
-
-
-    {
-        auto column = ColumnString::create();
-        ColumnString::Chars & data = column->getChars();
-        ColumnString::Offsets & offsets = column->getOffsets();
-
-        data.resize(n * size);
-        offsets.resize(n);
-        for (size_t i = 0; i < n; ++i)
-        {
-            memcpy(&data[i * size], s, size);
-            offsets[i] = (i + 1) * size;
-        }
-
-        WriteBufferFromFile out_buf("test");
-
-        IDataType::SerializeBinaryBulkSettings settings;
-        IDataType::SerializeBinaryBulkStatePtr state;
-        settings.getter = [&](const IDataType::SubstreamPath &){ return &out_buf; };
-
-        stopwatch.restart();
-        data_type.serializeBinaryBulkStatePrefix(settings, state);
-        data_type.serializeBinaryBulkWithMultipleStreams(*column, 0, 0, settings, state);
-        data_type.serializeBinaryBulkStateSuffix(settings, state);
-        stopwatch.stop();
-
-        std::cout << "Writing, elapsed: " << stopwatch.elapsedSeconds() << std::endl;
-    }
-
-    {
-        auto column = ColumnString::create();
-
-        ReadBufferFromFile in_buf("test");
-
-        IDataType::DeserializeBinaryBulkSettings settings;
-        IDataType::DeserializeBinaryBulkStatePtr state;
-        settings.getter = [&](const IDataType::SubstreamPath &){ return &in_buf; };
-
-        stopwatch.restart();
-        data_type.deserializeBinaryBulkStatePrefix(settings, state);
-        data_type.deserializeBinaryBulkWithMultipleStreams(*column, n, settings, state);
-        stopwatch.stop();
-
-        std::cout << "Reading, elapsed: " << stopwatch.elapsedSeconds() << std::endl;
-
-        std::cout << std::endl
-            << get<const String &>((*column)[0]) << std::endl
-            << get<const String &>((*column)[n - 1]) << std::endl;
-    }
-
-    return 0;
-}
-catch (const DB::Exception & e)
-{
-    std::cerr << e.what() << ", " << e.displayText() << std::endl;
-    return 1;
-}
diff --git a/src/DataTypes/tests/data_types_number_fixed.cpp b/src/DataTypes/tests/data_types_number_fixed.cpp
deleted file mode 100644
index 998d0f44481..00000000000
--- a/src/DataTypes/tests/data_types_number_fixed.cpp
+++ /dev/null
@@ -1,41 +0,0 @@
-#include <iostream>
-#include <fstream>
-
-#include <Common/Stopwatch.h>
-
-#include <IO/WriteBufferFromOStream.h>
-#include <Columns/ColumnsNumber.h>
-#include <DataTypes/DataTypesNumber.h>
-
-
-int main(int, char **)
-{
-    using namespace DB;
-
-    auto column = ColumnUInt64::create();
-    ColumnUInt64::Container & vec = column->getData();
-    DataTypeUInt64 data_type;
-
-    Stopwatch stopwatch;
-    size_t n = 10000000;
-
-    vec.resize(n);
-    for (size_t i = 0; i < n; ++i)
-        vec[i] = i;
-
-    std::ofstream ostr("test");
-    WriteBufferFromOStream out_buf(ostr);
-
-    stopwatch.restart();
-    IDataType::SerializeBinaryBulkSettings settings;
-    settings.getter = [&](const IDataType::SubstreamPath &){ return &out_buf; };
-    IDataType::SerializeBinaryBulkStatePtr state;
-    data_type.serializeBinaryBulkStatePrefix(settings, state);
-    data_type.serializeBinaryBulkWithMultipleStreams(*column, 0, 0, settings, state);
-    data_type.serializeBinaryBulkStateSuffix(settings, state);
-    stopwatch.stop();
-
-    std::cout << "Elapsed: " << stopwatch.elapsedSeconds() << std::endl;
-
-    return 0;
-}