diff --git a/modules/features2d/test/test_descriptors_regression.cpp b/modules/features2d/test/test_descriptors_regression.cpp
index 2185625ae..a1c07f86b 100644
--- a/modules/features2d/test/test_descriptors_regression.cpp
+++ b/modules/features2d/test/test_descriptors_regression.cpp
@@ -61,7 +61,7 @@ static void writeMatInBin( const Mat& mat, const string& filename )
         fwrite( (void*)&mat.rows, sizeof(int), 1, f );
         fwrite( (void*)&mat.cols, sizeof(int), 1, f );
         fwrite( (void*)&type, sizeof(int), 1, f );
-        int dataSize = (int)(mat.step * mat.rows * mat.channels());
+        int dataSize = (int)(mat.step * mat.rows);
         fwrite( (void*)&dataSize, sizeof(int), 1, f );
         fwrite( (void*)mat.data, 1, dataSize, f );
         fclose(f);
@@ -80,12 +80,15 @@ static Mat readMatFromBin( const string& filename )
         size_t elements_read4 = fread( (void*)&dataSize, sizeof(int), 1, f );
         CV_Assert(elements_read1 == 1 && elements_read2 == 1 && elements_read3 == 1 && elements_read4 == 1);
 
-        uchar* data = (uchar*)cvAlloc(dataSize);
-        size_t elements_read = fread( (void*)data, 1, dataSize, f );
+        Mat returnMat(rows, cols, type);
+        CV_Assert(returnMat.step * returnMat.rows == (size_t)(dataSize));
+
+        size_t elements_read = fread( (void*)returnMat.data, 1, dataSize, f );
         CV_Assert(elements_read == (size_t)(dataSize));
+
         fclose(f);
 
-        return Mat( rows, cols, type, data );
+        return returnMat;
     }
     return Mat();
 }
diff --git a/modules/features2d/test/test_lshindex_flannbased_matcher.cpp b/modules/features2d/test/test_lshindex_flannbased_matcher.cpp
index ddc81b0c5..d1c6ea7e4 100644
--- a/modules/features2d/test/test_lshindex_flannbased_matcher.cpp
+++ b/modules/features2d/test/test_lshindex_flannbased_matcher.cpp
@@ -303,7 +303,8 @@ public:
     //
     // constructor
     //
-    CV_FeatureDetectorMatcherBaseTest(testparam* _tp, double _accuracy_margin, cv::Feature2D* _fe, cv::DescriptorMatcher *_flmatcher, string _flmatchername, int norm_type_for_bfmatcher) :
+    CV_FeatureDetectorMatcherBaseTest(testparam* _tp, double _accuracy_margin, cv::Feature2D* _fe,
+                                      cv::DescriptorMatcher *_flmatcher, string _flmatchername, int norm_type_for_bfmatcher) :
         tp(_tp),
         target_accuracy_margin_from_bfmatcher(_accuracy_margin),
         fe(_fe),
@@ -318,6 +319,15 @@ public:
         bfmatcher = new cv::BFMatcher(norm_type_for_bfmatcher);
     }
 
+    virtual ~CV_FeatureDetectorMatcherBaseTest()
+    {
+        if (bfmatcher)
+        {
+            delete bfmatcher;
+            bfmatcher = NULL;
+        }
+    }
+
     //
     // Main Test method
     //
diff --git a/modules/features2d/test/test_nearestneighbors.cpp b/modules/features2d/test/test_nearestneighbors.cpp
index b63bc6433..bb1d51bf6 100644
--- a/modules/features2d/test/test_nearestneighbors.cpp
+++ b/modules/features2d/test/test_nearestneighbors.cpp
@@ -159,7 +159,7 @@ void NearestNeighborTest::run( int /*start_from*/ ) {
 class CV_KDTreeTest_CPP : public NearestNeighborTest
 {
 public:
-    CV_KDTreeTest_CPP() {}
+    CV_KDTreeTest_CPP() : NearestNeighborTest(), tr(NULL) {}
 protected:
     virtual void createModel( const Mat& data );
     virtual int checkGetPoints( const Mat& data );
@@ -244,7 +244,7 @@ void CV_KDTreeTest_CPP::releaseModel()
 class CV_FlannTest : public NearestNeighborTest
 {
 public:
-    CV_FlannTest() {}
+    CV_FlannTest() : NearestNeighborTest(), index(NULL) { }
 protected:
     void createIndex( const Mat& data, const IndexParams& params );
     int knnSearch( Mat& points, Mat& neighbors );
@@ -255,6 +255,9 @@ protected:
 
 void CV_FlannTest::createIndex( const Mat& data, const IndexParams& params )
 {
+    // release previously allocated index
+    releaseModel();
+
     index = new Index( data, params );
 }
 
@@ -321,7 +324,11 @@ int CV_FlannTest::radiusSearch( Mat& points, Mat& neighbors )
 
 void CV_FlannTest::releaseModel()
 {
-    delete index;
+    if (index)
+    {
+        delete index;
+        index = NULL;
+    }
 }
 
 //---------------------------------------