diff --git a/modules/ocl/src/initialization.cpp b/modules/ocl/src/initialization.cpp
index d1ad695ff8..5d81517959 100644
--- a/modules/ocl/src/initialization.cpp
+++ b/modules/ocl/src/initialization.cpp
@@ -319,7 +319,7 @@ namespace cv
             char clVersion[256];
             for (unsigned i = 0; i < numPlatforms; ++i)
             {
-                cl_uint numsdev;
+                cl_uint numsdev = 0;
                 cl_int status = clGetDeviceIDs(platforms[i], devicetype, 0, NULL, &numsdev);
                 if(status != CL_DEVICE_NOT_FOUND)
                     openCLVerifyCall(status);
diff --git a/modules/ocl/test/main.cpp b/modules/ocl/test/main.cpp
index 4ba02cf9bc..1250691a1f 100644
--- a/modules/ocl/test/main.cpp
+++ b/modules/ocl/test/main.cpp
@@ -73,14 +73,12 @@ void print_info()
 #endif
 
 }
-std::string workdir;
 int main(int argc, char **argv)
 {
-    TS::ptr()->init("ocl");
+    TS::ptr()->init(".");
     InitGoogleTest(&argc, argv);
     const char *keys =
         "{ h | help     | false              | print help message }"
-        "{ w | workdir  | ../../../samples/c/| set working directory }"
         "{ t | type     | gpu                | set device type:cpu or gpu}"
         "{ p | platform | 0                  | set platform id }"
         "{ d | device   | 0                  | set device id }";
@@ -92,7 +90,6 @@ int main(int argc, char **argv)
         cmd.printParams();
         return 0;
     }
-    workdir = cmd.get<string>("workdir");
     string type = cmd.get<string>("type");
     unsigned int pid = cmd.get<unsigned int>("platform");
     int device = cmd.get<int>("device");
diff --git a/modules/ocl/test/test_calib3d.cpp b/modules/ocl/test/test_calib3d.cpp
index 14fb31f53a..950f19d3c0 100644
--- a/modules/ocl/test/test_calib3d.cpp
+++ b/modules/ocl/test/test_calib3d.cpp
@@ -50,7 +50,6 @@
 
 using namespace cv;
 
-extern std::string workdir;
 PARAM_TEST_CASE(StereoMatchBM, int, int)
 {
     int n_disp;
@@ -66,9 +65,9 @@ PARAM_TEST_CASE(StereoMatchBM, int, int)
 TEST_P(StereoMatchBM, Regression)
 {
 
-    Mat left_image  = readImage("stereobm/aloe-L.png", IMREAD_GRAYSCALE);
-    Mat right_image = readImage("stereobm/aloe-R.png", IMREAD_GRAYSCALE);
-    Mat disp_gold   = readImage("stereobm/aloe-disp.png", IMREAD_GRAYSCALE);
+    Mat left_image  = readImage("gpu/stereobm/aloe-L.png", IMREAD_GRAYSCALE);
+    Mat right_image = readImage("gpu/stereobm/aloe-R.png", IMREAD_GRAYSCALE);
+    Mat disp_gold   = readImage("gpu/stereobm/aloe-disp.png", IMREAD_GRAYSCALE);
     ocl::oclMat d_left, d_right;
     ocl::oclMat d_disp(left_image.size(), CV_8U);
     Mat  disp;
@@ -113,9 +112,9 @@ PARAM_TEST_CASE(StereoMatchBP, int, int, int, float, float, float, float)
 };
 TEST_P(StereoMatchBP, Regression)
 {
-    Mat left_image  = readImage("stereobp/aloe-L.png");
-    Mat right_image = readImage("stereobp/aloe-R.png");
-    Mat disp_gold   = readImage("stereobp/aloe-disp.png", IMREAD_GRAYSCALE);
+    Mat left_image  = readImage("gpu/stereobp/aloe-L.png");
+    Mat right_image = readImage("gpu/stereobp/aloe-R.png");
+    Mat disp_gold   = readImage("gpu/stereobp/aloe-disp.png", IMREAD_GRAYSCALE);
     ocl::oclMat d_left, d_right;
     ocl::oclMat d_disp;
     Mat  disp;
@@ -166,9 +165,9 @@ PARAM_TEST_CASE(StereoMatchConstSpaceBP, int, int, int, int, float, float, float
 };
 TEST_P(StereoMatchConstSpaceBP, Regression)
 {
-    Mat left_image  = readImage("csstereobp/aloe-L.png");
-    Mat right_image = readImage("csstereobp/aloe-R.png");
-    Mat disp_gold   = readImage("csstereobp/aloe-disp.png", IMREAD_GRAYSCALE);
+    Mat left_image  = readImage("gpu/csstereobp/aloe-L.png");
+    Mat right_image = readImage("gpu/csstereobp/aloe-R.png");
+    Mat disp_gold   = readImage("gpu/csstereobp/aloe-disp.png", IMREAD_GRAYSCALE);
 
     ocl::oclMat d_left, d_right;
     ocl::oclMat d_disp;
diff --git a/modules/ocl/test/test_canny.cpp b/modules/ocl/test/test_canny.cpp
index 10032e897c..b378b2281b 100644
--- a/modules/ocl/test/test_canny.cpp
+++ b/modules/ocl/test/test_canny.cpp
@@ -48,7 +48,6 @@
 
 ////////////////////////////////////////////////////////
 // Canny
-extern std::string workdir;
 IMPLEMENT_PARAM_CLASS(AppertureSize, int);
 IMPLEMENT_PARAM_CLASS(L2gradient, bool);
 
@@ -67,7 +66,7 @@ PARAM_TEST_CASE(Canny, AppertureSize, L2gradient)
 
 TEST_P(Canny, Accuracy)
 {
-    cv::Mat img = readImage(workdir + "fruits.jpg", cv::IMREAD_GRAYSCALE);
+    cv::Mat img = readImage("cv/shared/fruits.png", cv::IMREAD_GRAYSCALE);
     ASSERT_FALSE(img.empty());
 
     double low_thresh = 50.0;
diff --git a/modules/ocl/test/test_moments.cpp b/modules/ocl/test/test_moments.cpp
index 86f4779d68..e3ab1fa3ce 100644
--- a/modules/ocl/test/test_moments.cpp
+++ b/modules/ocl/test/test_moments.cpp
@@ -45,7 +45,7 @@ TEST_P(MomentsTest, Mat)
     {
         if(test_contours)
         {
-            Mat src = imread( workdir + "../cpp/pic3.png", IMREAD_GRAYSCALE );
+            Mat src = readImage( "cv/shared/pic3.png", IMREAD_GRAYSCALE );
             ASSERT_FALSE(src.empty());
             Mat canny_output;
             vector<vector<Point> > contours;
diff --git a/modules/ocl/test/test_objdetect.cpp b/modules/ocl/test/test_objdetect.cpp
index bc719b0974..e9b571e602 100644
--- a/modules/ocl/test/test_objdetect.cpp
+++ b/modules/ocl/test/test_objdetect.cpp
@@ -63,11 +63,8 @@ PARAM_TEST_CASE(HOG, Size, int)
     {
         winSize = GET_PARAM(0);
         type = GET_PARAM(1);
-        img_rgb = readImage(workdir + "../gpu/road.png");
-        if(img_rgb.empty())
-        {
-            std::cout << "Couldn't read road.png" << std::endl;
-        }
+        img_rgb = readImage("gpu/hog/road.png");
+        ASSERT_FALSE(img_rgb.empty());
     }
 };
 
@@ -211,18 +208,11 @@ PARAM_TEST_CASE(Haar, int, CascadeName)
     virtual void SetUp()
     {
         flags = GET_PARAM(0);
-        cascadeName = (workdir + "../../data/haarcascades/").append(GET_PARAM(1));
-        if( (!cascade.load( cascadeName )) || (!cpucascade.load(cascadeName)) )
-        {
-            std::cout << "ERROR: Could not load classifier cascade" << std::endl;
-            return;
-        }
-        img = readImage(workdir + "lena.jpg", IMREAD_GRAYSCALE);
-        if(img.empty())
-        {
-            std::cout << "Couldn't read lena.jpg" << std::endl;
-            return ;
-        }
+        cascadeName = (string(cvtest::TS::ptr()->get_data_path()) + "cv/cascadeandhog/cascades/").append(GET_PARAM(1));
+        ASSERT_TRUE(cascade.load( cascadeName ));
+        ASSERT_TRUE(cpucascade.load(cascadeName));
+        img = readImage("cv/shared/lena.png", IMREAD_GRAYSCALE);
+        ASSERT_FALSE(img.empty());
         equalizeHist(img, img);
         d_img.upload(img);
     }
diff --git a/modules/ocl/test/test_optflow.cpp b/modules/ocl/test/test_optflow.cpp
index 34adb352c2..941ade129e 100644
--- a/modules/ocl/test/test_optflow.cpp
+++ b/modules/ocl/test/test_optflow.cpp
@@ -75,7 +75,7 @@ PARAM_TEST_CASE(GoodFeaturesToTrack, MinDistance)
 
 TEST_P(GoodFeaturesToTrack, Accuracy)
 {
-    cv::Mat frame = readImage(workdir + "../gpu/rubberwhale1.png", cv::IMREAD_GRAYSCALE);
+    cv::Mat frame = readImage("gpu/opticalflow/rubberwhale1.png", cv::IMREAD_GRAYSCALE);
     ASSERT_FALSE(frame.empty());
 
     int maxCorners = 1000;
@@ -146,10 +146,10 @@ PARAM_TEST_CASE(TVL1, bool)
 
 TEST_P(TVL1, Accuracy)
 {
-    cv::Mat frame0 = readImage(workdir + "../gpu/rubberwhale1.png", cv::IMREAD_GRAYSCALE);
+    cv::Mat frame0 = readImage("gpu/opticalflow/rubberwhale1.png", cv::IMREAD_GRAYSCALE);
     ASSERT_FALSE(frame0.empty());
 
-    cv::Mat frame1 = readImage(workdir + "../gpu/rubberwhale2.png", cv::IMREAD_GRAYSCALE);
+    cv::Mat frame1 = readImage("gpu/opticalflow/rubberwhale2.png", cv::IMREAD_GRAYSCALE);
     ASSERT_FALSE(frame1.empty());
 
     cv::ocl::OpticalFlowDual_TVL1_OCL d_alg;
@@ -188,10 +188,10 @@ PARAM_TEST_CASE(Sparse, bool, bool)
 
 TEST_P(Sparse, Mat)
 {
-    cv::Mat frame0 = readImage(workdir + "../gpu/rubberwhale1.png", useGray ? cv::IMREAD_GRAYSCALE : cv::IMREAD_COLOR);
+    cv::Mat frame0 = readImage("gpu/opticalflow/rubberwhale1.png", useGray ? cv::IMREAD_GRAYSCALE : cv::IMREAD_COLOR);
     ASSERT_FALSE(frame0.empty());
 
-    cv::Mat frame1 = readImage(workdir + "../gpu/rubberwhale2.png", useGray ? cv::IMREAD_GRAYSCALE : cv::IMREAD_COLOR);
+    cv::Mat frame1 = readImage("gpu/opticalflow/rubberwhale2.png", useGray ? cv::IMREAD_GRAYSCALE : cv::IMREAD_COLOR);
     ASSERT_FALSE(frame1.empty());
 
     cv::Mat gray_frame;
@@ -301,10 +301,10 @@ PARAM_TEST_CASE(Farneback, PyrScale, PolyN, FarnebackOptFlowFlags, UseInitFlow)
 
 TEST_P(Farneback, Accuracy)
 {
-    cv::Mat frame0 = imread(workdir + "/rubberwhale1.png", cv::IMREAD_GRAYSCALE);
+    cv::Mat frame0 = readImage("gpu/opticalflow/rubberwhale1.png", cv::IMREAD_GRAYSCALE);
     ASSERT_FALSE(frame0.empty());
 
-    cv::Mat frame1 = imread(workdir + "/rubberwhale2.png", cv::IMREAD_GRAYSCALE);
+    cv::Mat frame1 = readImage("gpu/opticalflow/rubberwhale2.png", cv::IMREAD_GRAYSCALE);
     ASSERT_FALSE(frame1.empty());
 
     double polySigma = polyN <= 5 ? 1.1 : 1.5;