diff --git a/modules/core/src/umatrix.cpp b/modules/core/src/umatrix.cpp
index a186207053..2ea71acc8b 100644
--- a/modules/core/src/umatrix.cpp
+++ b/modules/core/src/umatrix.cpp
@@ -602,13 +602,14 @@ void UMat::copyTo(OutputArray _dst) const
         return;
     }
 
-    size_t i, sz[CV_MAX_DIM], srcofs[CV_MAX_DIM], dstofs[CV_MAX_DIM];
+    size_t i, sz[CV_MAX_DIM], srcofs[CV_MAX_DIM], dstofs[CV_MAX_DIM], esz = elemSize();
     for( i = 0; i < (size_t)dims; i++ )
         sz[i] = size.p[i];
-    sz[dims-1] *= elemSize();
+    sz[dims-1] *= esz;
     ndoffset(srcofs);
+    srcofs[dims-1] *= esz;
 
-    _dst.create( dims, size, type() );
+    _dst.create( dims, size.p, type() );
     if( _dst.kind() == _InputArray::UMAT )
     {
         UMat dst = _dst.getUMat();
diff --git a/modules/core/test/test_umat.cpp b/modules/core/test/test_umat.cpp
new file mode 100644
index 0000000000..b2dd6f9fd9
--- /dev/null
+++ b/modules/core/test/test_umat.cpp
@@ -0,0 +1,132 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the OpenCV Foundation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "test_precomp.hpp"
+
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <iterator>
+#include <limits>
+#include <numeric>
+
+using namespace cv;
+using namespace std;
+
+class CV_UMatTest : public cvtest::BaseTest
+{
+public:
+    CV_UMatTest() {}
+    ~CV_UMatTest() {}
+protected:
+    void run(int);
+
+    struct test_excep
+    {
+        test_excep(const string& _s=string("")) : s(_s) {};
+        string s;
+    };
+
+    bool TestUMat();
+
+    void checkDiff(const Mat& m1, const Mat& m2, const string& s)
+    {
+        if (norm(m1, m2, NORM_INF) != 0)
+            throw test_excep(s);
+    }
+    void checkDiffF(const Mat& m1, const Mat& m2, const string& s)
+    {
+        if (norm(m1, m2, NORM_INF) > 1e-5)
+            throw test_excep(s);
+    }
+};
+
+#define STR(a) STR2(a)
+#define STR2(a) #a
+
+#define CHECK_DIFF(a, b) checkDiff(a, b, "(" #a ")  !=  (" #b ")  at l." STR(__LINE__))
+#define CHECK_DIFF_FLT(a, b) checkDiffF(a, b, "(" #a ")  !=(eps)  (" #b ")  at l." STR(__LINE__))
+
+
+bool CV_UMatTest::TestUMat()
+{
+    try
+    {
+        Mat a(100, 100, CV_16S), b;
+        randu(a, Scalar::all(-100), Scalar::all(100));
+        Rect roi(1, 3, 10, 20);
+        Mat ra(a, roi), rb;
+        UMat ua, ura;
+        a.copyTo(ua);
+        ua.copyTo(b);
+        CHECK_DIFF(a, b);
+        
+        ura = ua(roi);
+        ura.copyTo(rb);
+        
+        CHECK_DIFF(ra, rb);
+        
+        ra += Scalar::all(1.f);
+        {
+        Mat temp = ura.getMat(ACCESS_RW);
+        temp += Scalar::all(1.f);
+        }
+        ra.copyTo(rb);
+        CHECK_DIFF(ra, rb);
+    }
+    catch (const test_excep& e)
+    {
+        ts->printf(cvtest::TS::LOG, "%s\n", e.s.c_str());
+        ts->set_failed_test_info(cvtest::TS::FAIL_MISMATCH);
+        return false;
+    }
+    return true;
+}
+
+void CV_UMatTest::run( int /* start_from */)
+{
+    if (!TestUMat())
+        return;
+
+    ts->set_failed_test_info(cvtest::TS::OK);
+}
+
+TEST(Core_UMat, base) { CV_UMatTest test; test.safe_run(); }