diff --git a/ngraph/core/include/ngraph/file_util.hpp b/ngraph/core/include/ngraph/file_util.hpp
index 4a08fe45677..b589d62df53 100644
--- a/ngraph/core/include/ngraph/file_util.hpp
+++ b/ngraph/core/include/ngraph/file_util.hpp
@@ -54,44 +54,6 @@ namespace ngraph
                               const std::string& s3,
                               const std::string& s4);
 
-        /// \brief Returns the size in bytes of filename
-        /// \param filename The name of the file
-        NGRAPH_API
-        size_t get_file_size(const std::string& filename);
-
-        /// \brief Removes all files and directories starting at dir
-        /// \param dir The path of the directory to remove
-        NGRAPH_API
-        void remove_directory(const std::string& dir);
-
-        /// \brief Create a directory
-        /// \param dir Path of the directory to create
-        /// \return true if the directory was created, false otherwise
-        NGRAPH_API
-        bool make_directory(const std::string& dir);
-
-        /// \brief Gets the path of the system temporary directory
-        /// \return the path to the system temporary directory
-        NGRAPH_API
-        std::string get_temp_directory_path();
-
-        /// \brief Removes a file from the filesystem
-        /// \param file The path to the file to be removed
-        NGRAPH_API
-        void remove_file(const std::string& file);
-
-        /// \brief Reads the contents of a file
-        /// \param path The path of the file to read
-        /// \return vector<char> of the file's contents
-        NGRAPH_API
-        std::vector<char> read_file_contents(const std::string& path);
-
-        /// \brief Reads the contents of a file
-        /// \param path The path of the file to read
-        /// \return string of the file's contents
-        NGRAPH_API
-        std::string read_file_to_string(const std::string& path);
-
         /// \brief Iterate through files and optionally directories. Symbolic links are skipped.
         /// \param path The path to iterate over
         /// \param func A callback function called with each file or directory encountered
@@ -101,17 +63,5 @@ namespace ngraph
                            std::function<void(const std::string& file, bool is_dir)> func,
                            bool recurse = false,
                            bool include_links = false);
-
-        /// \brief Create a temporary file
-        /// \param extension Optional extension for the temporary file
-        /// \return Name of the temporary file
-        NGRAPH_API
-        std::string tmp_filename(const std::string& extension = "");
-
-        /// \brief Test for the existence of a path or file
-        /// \param path The path to test
-        /// \return true if the path exists, false otherwise
-        NGRAPH_API
-        bool exists(const std::string& path);
     }
 }
diff --git a/ngraph/core/reference/include/ngraph/runtime/reference/detection_output.hpp b/ngraph/core/reference/include/ngraph/runtime/reference/detection_output.hpp
index 8379d79a51b..d2499be7cf4 100644
--- a/ngraph/core/reference/include/ngraph/runtime/reference/detection_output.hpp
+++ b/ngraph/core/reference/include/ngraph/runtime/reference/detection_output.hpp
@@ -563,8 +563,12 @@ namespace ngraph
                                 {
                                     continue;
                                 }
+                                if (confScores.find(c) == confScores.end())
+                                    continue;
                                 const std::vector<dataType>& scores = confScores.find(c)->second;
                                 int label = attrs.share_location ? -1 : c;
+                                if (decodeBboxesImage.find(label) == decodeBboxesImage.end())
+                                    continue;
                                 const std::vector<NormalizedBBox>& bboxes =
                                     decodeBboxesImage.find(label)->second;
                                 caffeNMS(bboxes, scores, indices[c]);
@@ -585,6 +589,8 @@ namespace ngraph
                             {
                                 int label = it->first;
                                 const std::vector<int>& labelIndices = it->second;
+                                if (confScores.find(label) == confScores.end())
+                                    continue;
                                 const std::vector<dataType>& scores =
                                     confScores.find(label)->second;
                                 for (int j = 0; j < labelIndices.size(); ++j)
@@ -625,6 +631,8 @@ namespace ngraph
                             int label = it->first;
                             const std::vector<dataType>& scores = confScores.find(label)->second;
                             int loc_label = attrs.share_location ? -1 : label;
+                            if (decodeBboxesImage.find(loc_label) == decodeBboxesImage.end())
+                                continue;
                             const std::vector<NormalizedBBox>& bboxes =
                                 decodeBboxesImage.find(loc_label)->second;
                             std::vector<int>& indices = it->second;
diff --git a/ngraph/core/reference/include/ngraph/runtime/reference/gather_nd.hpp b/ngraph/core/reference/include/ngraph/runtime/reference/gather_nd.hpp
index a596098958c..e21f4f700bc 100644
--- a/ngraph/core/reference/include/ngraph/runtime/reference/gather_nd.hpp
+++ b/ngraph/core/reference/include/ngraph/runtime/reference/gather_nd.hpp
@@ -94,6 +94,8 @@ namespace ngraph
                                                          params_end_corner,
                                                          params_strides,
                                                          params_axis_order);
+                    if (out_coord_iter == out_transform.end())
+                        break;
                     auto out_index = out_transform.index(*out_coord_iter);
                     for (const Coordinate& params_coord : params_transform)
                     {
diff --git a/ngraph/core/reference/include/ngraph/runtime/reference/interpolate.hpp b/ngraph/core/reference/include/ngraph/runtime/reference/interpolate.hpp
index 6cd65693336..28f94035db0 100644
--- a/ngraph/core/reference/include/ngraph/runtime/reference/interpolate.hpp
+++ b/ngraph/core/reference/include/ngraph/runtime/reference/interpolate.hpp
@@ -283,7 +283,7 @@ namespace ngraph
                 struct LinearModeInnerIterationResult
                 {
                     bool condition;
-                    float w;
+                    float w = 0;
                     Coordinate inner_coord;
                 };
 
diff --git a/ngraph/core/reference/include/ngraph/runtime/reference/matmul.hpp b/ngraph/core/reference/include/ngraph/runtime/reference/matmul.hpp
index 6ee0d3146ca..4ac53903299 100644
--- a/ngraph/core/reference/include/ngraph/runtime/reference/matmul.hpp
+++ b/ngraph/core/reference/include/ngraph/runtime/reference/matmul.hpp
@@ -146,13 +146,14 @@ namespace ngraph
                 // Inputs are 2D and below, perform dot directly
                 if (arg0_rank <= 2 && arg1_rank <= 2)
                 {
-                    return dot(arg0_update,
-                               arg1_update,
-                               out,
-                               wip_arg0_shape,
-                               wip_arg1_shape,
-                               out_shape,
-                               1);
+                    dot(arg0_update,
+                        arg1_update,
+                        out,
+                        wip_arg0_shape,
+                        wip_arg1_shape,
+                        out_shape,
+                        1);
+                    return;
                 }
 
                 // Check and perform auto-broadcast if needed
diff --git a/ngraph/core/reference/include/ngraph/runtime/reference/replace_slice.hpp b/ngraph/core/reference/include/ngraph/runtime/reference/replace_slice.hpp
index 6cf444fd6c5..1580dbcad71 100644
--- a/ngraph/core/reference/include/ngraph/runtime/reference/replace_slice.hpp
+++ b/ngraph/core/reference/include/ngraph/runtime/reference/replace_slice.hpp
@@ -57,6 +57,8 @@ namespace ngraph
 
                 for (const Coordinate& input_coord : input_transform)
                 {
+                    if (output_it == output_transform.end())
+                        break;
                     const Coordinate& output_coord = *output_it;
 
                     out[output_transform.index(output_coord)] =
diff --git a/ngraph/core/reference/include/ngraph/runtime/reference/scatter_update.hpp b/ngraph/core/reference/include/ngraph/runtime/reference/scatter_update.hpp
index f8d00b17ebf..c79a6a91a5e 100644
--- a/ngraph/core/reference/include/ngraph/runtime/reference/scatter_update.hpp
+++ b/ngraph/core/reference/include/ngraph/runtime/reference/scatter_update.hpp
@@ -89,6 +89,8 @@ namespace ngraph
 
                     // Define the CoordinateTransform for updates coordinates.
                     // All except indices-dimensions.
+                    if (updates_indices_coord_iter == updates_indices_transform.end())
+                        break;
                     Coordinate updates_update_start_corner = *updates_indices_coord_iter;
                     Coordinate updates_update_end_corner(updates_shape);
                     for (size_t i = 0; i < indices_ndim; ++i)
@@ -105,6 +107,8 @@ namespace ngraph
                     auto updates_update_coord_iter = updates_update_transform.begin();
                     for (const Coordinate& out_cord : out_transform)
                     {
+                        if (updates_update_coord_iter == updates_update_transform.end())
+                            break;
                         const auto src_idx =
                             updates_update_transform.index(*updates_update_coord_iter) * elem_size;
                         std::copy(updates + src_idx,
diff --git a/ngraph/core/reference/src/runtime/reference/pad.cpp b/ngraph/core/reference/src/runtime/reference/pad.cpp
index 95274324fab..2f441beef95 100644
--- a/ngraph/core/reference/src/runtime/reference/pad.cpp
+++ b/ngraph/core/reference/src/runtime/reference/pad.cpp
@@ -64,6 +64,8 @@ namespace ngraph
 
                 for (const Coordinate& in_coord : input_transform)
                 {
+                    if (output_it == output_transform.end())
+                        break;
                     const Coordinate& out_coord = *output_it;
 
                     std::fill(v.begin(), v.end(), 0);
diff --git a/ngraph/core/reference/src/runtime/reference/reshape.cpp b/ngraph/core/reference/src/runtime/reference/reshape.cpp
index 5872ee3e77e..a9c06e81942 100644
--- a/ngraph/core/reference/src/runtime/reference/reshape.cpp
+++ b/ngraph/core/reference/src/runtime/reference/reshape.cpp
@@ -46,6 +46,8 @@ void runtime::reference::reshape(const char* arg,
 
     for (const Coordinate& input_coord : input_transform)
     {
+        if (output_it == output_transform.end())
+            break;
         const Coordinate& output_coord = *output_it;
 
         memcpy(out + output_transform.index(output_coord) * elem_size,
diff --git a/ngraph/core/reference/src/runtime/reference/slice.cpp b/ngraph/core/reference/src/runtime/reference/slice.cpp
index 415d55af1f7..532b596979e 100644
--- a/ngraph/core/reference/src/runtime/reference/slice.cpp
+++ b/ngraph/core/reference/src/runtime/reference/slice.cpp
@@ -45,6 +45,8 @@ namespace ngraph
 
                 for (const Coordinate& in_coord : input_transform)
                 {
+                    if (output_it == output_transform.end())
+                        break;
                     const Coordinate& out_coord = *output_it;
 
                     memcpy(out + output_transform.index(out_coord) * elem_size,
diff --git a/ngraph/core/src/env_util.cpp b/ngraph/core/src/env_util.cpp
index 450c456535f..81aff3a1290 100644
--- a/ngraph/core/src/env_util.cpp
+++ b/ngraph/core/src/env_util.cpp
@@ -25,8 +25,7 @@ using namespace std;
 std::string ngraph::getenv_string(const char* env_var)
 {
     const char* env_p = ::getenv(env_var);
-    string env_string = env_p ? env_p : "";
-    return env_string;
+    return env_p != nullptr ? string(env_p) : "";
 }
 
 int32_t ngraph::getenv_int(const char* env_var, int32_t default_value)
diff --git a/ngraph/core/src/file_util.cpp b/ngraph/core/src/file_util.cpp
index 2d4237924be..14c855097df 100644
--- a/ngraph/core/src/file_util.cpp
+++ b/ngraph/core/src/file_util.cpp
@@ -125,118 +125,6 @@ string file_util::path_join(const string& s1, const string& s2)
     return rc;
 }
 
-size_t file_util::get_file_size(const string& filename)
-{
-    // ensure that filename exists and get its size
-
-    struct stat stats;
-    if (stat(filename.c_str(), &stats) == -1)
-    {
-        throw runtime_error("Could not find file: \"" + filename + "\"");
-    }
-
-    return stats.st_size;
-}
-
-void file_util::remove_directory(const string& dir)
-{
-    struct stat status;
-    if (stat(dir.c_str(), &status) != -1)
-    {
-        iterate_files(dir,
-                      [](const string& file, bool is_dir) {
-                          if (is_dir)
-                          {
-                              RMDIR(file.c_str());
-                          }
-                          else
-                          {
-                              RMFILE(file.c_str());
-                          }
-                      },
-                      true);
-        RMDIR(dir.c_str());
-    }
-}
-
-void file_util::remove_file(const string& file)
-{
-    remove(file.c_str());
-}
-
-bool file_util::make_directory(const string& dir)
-{
-#ifdef _WIN32
-    CreateDirectoryA(dir.c_str(), nullptr);
-#else
-    if (mkdir(dir.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH))
-    {
-        if (errno == EEXIST)
-        {
-            // not really an error, the directory already exists
-            return false;
-        }
-        throw runtime_error("error making directory " + dir + " " + strerror(errno));
-    }
-#endif
-    return true;
-}
-
-string file_util::get_temp_directory_path()
-{
-    const vector<string> potential_tmps = {"NGRAPH_TMP", "TMPDIR", "TMP", "TEMP", "TEMPDIR"};
-
-    string path;
-    for (const string& var : potential_tmps)
-    {
-        path = getenv_string(var.c_str());
-        if (!path.empty())
-        {
-            break;
-        }
-    }
-    if (path.empty())
-    {
-        path = "/tmp";
-    }
-
-    return path;
-}
-
-vector<char> file_util::read_file_contents(const string& path)
-{
-    size_t file_size = get_file_size(path);
-    vector<char> data(file_size);
-
-    FILE* f = fopen(path.c_str(), "rb");
-    if (f)
-    {
-        char* p = data.data();
-        size_t remainder = file_size;
-        size_t offset = 0;
-        while (f && remainder > 0)
-        {
-            size_t rc = fread(&p[offset], 1, remainder, f);
-            offset += rc;
-            remainder -= rc;
-        }
-        fclose(f);
-    }
-    else
-    {
-        throw runtime_error("error opening file '" + path + "'");
-    }
-    return data;
-}
-
-string file_util::read_file_to_string(const string& path)
-{
-    ifstream f(path);
-    stringstream ss;
-    ss << f.rdbuf();
-    return ss.str();
-}
-
 #ifndef _WIN32
 static void iterate_files_worker(const string& path,
                                  function<void(const string& file, bool is_dir)> func,
@@ -352,30 +240,3 @@ void file_util::iterate_files(const string& path,
         func(f, true);
     }
 }
-
-string file_util::tmp_filename(const string& extension)
-{
-    string rc;
-#ifdef _WIN32
-    rc = _tempnam(file_util::get_temp_directory_path().c_str(), "ngraph_");
-#else
-    string tmp_template =
-        file_util::path_join(file_util::get_temp_directory_path(), "ngraph_XXXXXX" + extension);
-    char* tmpname = strdup(tmp_template.c_str());
-    if (tmpname != nullptr)
-    {
-        // mkstemp opens the file with open() so we need to close it
-        close(mkstemps(tmpname, static_cast<int>(extension.size())));
-
-        rc = tmpname;
-        free(tmpname);
-    }
-#endif
-    return rc;
-}
-
-bool file_util::exists(const string& filename)
-{
-    struct stat buffer;
-    return (stat(filename.c_str(), &buffer) == 0);
-}
diff --git a/ngraph/core/src/op/shape_of.cpp b/ngraph/core/src/op/shape_of.cpp
index 3aa6224dba0..851ddd935b8 100644
--- a/ngraph/core/src/op/shape_of.cpp
+++ b/ngraph/core/src/op/shape_of.cpp
@@ -193,6 +193,12 @@ shared_ptr<Node> op::v0::ShapeOf::clone_with_new_inputs(const OutputVector& new_
 {
     check_new_args_count(this, new_args);
     auto new_shape_of = make_shared<op::v0::ShapeOf>(new_args.at(0));
+    NGRAPH_CHECK(new_shape_of.get(),
+                 new_shape_of != nullptr,
+                 "Cannot clone ",
+                 description(),
+                 " operation with name ",
+                 get_friendly_name());
     new_shape_of->set_is_foldable(m_is_foldable);
     return new_shape_of;
 }
diff --git a/ngraph/core/src/op/tensor_iterator.cpp b/ngraph/core/src/op/tensor_iterator.cpp
index d1ee19e8899..73456a8d8fd 100644
--- a/ngraph/core/src/op/tensor_iterator.cpp
+++ b/ngraph/core/src/op/tensor_iterator.cpp
@@ -618,6 +618,12 @@ std::shared_ptr<Node>
     op::v0::TensorIterator::clone_with_new_inputs(const OutputVector& new_args) const
 {
     auto op = make_shared<op::v0::TensorIterator>(new_args);
+    NGRAPH_CHECK(op.get(),
+                 op != nullptr,
+                 "Cannot clone ",
+                 description(),
+                 " operation with name ",
+                 get_friendly_name());
     op->set_output_size(m_output_descriptions.size());
 
     std::vector<::ngraph::element::Type> types(m_body->get_parameters().size());
diff --git a/ngraph/core/src/op/util/scatter_base.cpp b/ngraph/core/src/op/util/scatter_base.cpp
index 371bb00cd2e..cfad2e3428b 100644
--- a/ngraph/core/src/op/util/scatter_base.cpp
+++ b/ngraph/core/src/op/util/scatter_base.cpp
@@ -79,54 +79,51 @@ void op::util::ScatterBase::validate_and_infer_types()
                                       data_shape.rank().get_length() - 1,
                           "Updates rank is expected to be indices rank + data rank - 1.");
 
-    bool compatible = true;
-    int64_t axis;
     bool is_axis_constant = op::is_constant(input_value(AXIS).get_node());
 
     // Get axis value if possible.
     if (is_axis_constant && data_shape.rank().is_static())
     {
+        bool compatible = true;
         const auto axis_const_input =
             as_type_ptr<op::v0::Constant>(input_value(AXIS).get_node_shared_ptr());
-        axis = axis_const_input->cast_vector<int64_t>().at(0);
+        int64_t axis = axis_const_input->cast_vector<int64_t>().at(0);
         axis = normalize_axis(this, axis, data_shape.rank().get_length());
+
+        if (indices_shape.rank().is_static() && updates_shape.rank().is_static())
+        {
+            for (int64_t i = 0; i < indices_shape.rank().get_length(); ++i)
+            {
+                compatible = compatible && updates_shape[axis + i].compatible(indices_shape[i]);
+            }
+
+            int64_t indices_rank = indices_shape.rank().get_length();
+            // Check [d_0, d_1, ... d_(axis - 1)] updates dimensions
+            for (int64_t i = 0; i < axis; ++i)
+            {
+                compatible = compatible && updates_shape[i].compatible(data_shape[i]);
+            }
+            // Check [d_(axis + k + 1), ..., d_n] updates dimensions
+            for (int64_t i = axis + 1; i < data_shape.rank().get_length(); ++i)
+            {
+                compatible =
+                    compatible && updates_shape[indices_rank - 1 + i].compatible(data_shape[i]);
+            }
+        }
+        NODE_VALIDATION_CHECK(this,
+                              compatible,
+                              "Updates shape must have appropriate dimensions equal to indices and "
+                              "data dimensions. Updates shape:",
+                              updates_shape,
+                              ", data shape: ",
+                              data_shape,
+                              ", indices_shape: ",
+                              indices_shape,
+                              ", axis: ",
+                              axis,
+                              ".");
     }
 
-    if (is_axis_constant && data_shape.rank().is_static() && indices_shape.rank().is_static() &&
-        updates_shape.rank().is_static())
-    {
-        for (int64_t i = 0; i < indices_shape.rank().get_length(); ++i)
-        {
-            compatible = compatible && updates_shape[axis + i].compatible(indices_shape[i]);
-        }
-
-        int64_t indices_rank = indices_shape.rank().get_length();
-        // Check [d_0, d_1, ... d_(axis - 1)] updates dimensions
-        for (int64_t i = 0; i < axis; ++i)
-        {
-            compatible = compatible && updates_shape[i].compatible(data_shape[i]);
-        }
-        // Check [d_(axis + k + 1), ..., d_n] updates dimensions
-        for (int64_t i = axis + 1; i < data_shape.rank().get_length(); ++i)
-        {
-            compatible =
-                compatible && updates_shape[indices_rank - 1 + i].compatible(data_shape[i]);
-        }
-    }
-
-    NODE_VALIDATION_CHECK(this,
-                          compatible,
-                          "Updates shape must have appropriate dimensions equal to indices and "
-                          "data dimensions. Updates shape:",
-                          updates_shape,
-                          ", data shape: ",
-                          data_shape,
-                          ", indices_shape: ",
-                          indices_shape,
-                          ", axis: ",
-                          axis,
-                          ".");
-
     if (data_shape.is_dynamic())
     {
         set_input_is_relevant_to_shape(0);
diff --git a/ngraph/core/src/runtime/aligned_buffer.cpp b/ngraph/core/src/runtime/aligned_buffer.cpp
index 3ae127d82c2..a6d1bba127e 100644
--- a/ngraph/core/src/runtime/aligned_buffer.cpp
+++ b/ngraph/core/src/runtime/aligned_buffer.cpp
@@ -37,7 +37,7 @@ runtime::AlignedBuffer::AlignedBuffer(size_t byte_size, size_t alignment)
     size_t allocation_size = m_byte_size + alignment;
     m_allocated_buffer = static_cast<char*>(ngraph_malloc(allocation_size));
     m_aligned_buffer = m_allocated_buffer;
-    size_t mod = size_t(m_aligned_buffer) % alignment;
+    size_t mod = (alignment != 0) ? size_t(m_aligned_buffer) % alignment : 0;
 
     if (mod != 0)
     {
@@ -67,6 +67,10 @@ runtime::AlignedBuffer& runtime::AlignedBuffer::operator=(AlignedBuffer&& other)
 {
     if (this != &other)
     {
+        if (m_allocated_buffer != nullptr)
+        {
+            free(m_allocated_buffer);
+        }
         m_allocated_buffer = other.m_allocated_buffer;
         m_aligned_buffer = other.m_aligned_buffer;
         m_byte_size = other.m_byte_size;
diff --git a/ngraph/core/src/runtime/host_tensor.cpp b/ngraph/core/src/runtime/host_tensor.cpp
index a1b624c977d..5a8c7fe8505 100644
--- a/ngraph/core/src/runtime/host_tensor.cpp
+++ b/ngraph/core/src/runtime/host_tensor.cpp
@@ -38,6 +38,10 @@ runtime::HostTensor::HostTensor(const ngraph::element::Type& element_type,
     {
         allocate_buffer();
     }
+    else
+    {
+        m_buffer_size = 0;
+    }
 }
 
 runtime::HostTensor::HostTensor(const element::Type& element_type,
@@ -52,6 +56,7 @@ runtime::HostTensor::HostTensor(const element::Type& element_type,
                                 const std::string& name)
     : runtime::Tensor(
           std::make_shared<ngraph::descriptor::Tensor>(element_type, partial_shape, name))
+    , m_buffer_size(0)
 {
     // Defer allocation until ptr is requested
 }
diff --git a/ngraph/frontend/onnx_import/src/ops_bridge.cpp b/ngraph/frontend/onnx_import/src/ops_bridge.cpp
index 111443ad3c4..8d127b19f28 100644
--- a/ngraph/frontend/onnx_import/src/ops_bridge.cpp
+++ b/ngraph/frontend/onnx_import/src/ops_bridge.cpp
@@ -157,7 +157,6 @@ namespace ngraph
             const std::map<std::int64_t, Operator>::const_iterator
                 find(std::int64_t version, const std::map<std::int64_t, Operator>& map)
             {
-                std::map<std::int64_t, Operator>::const_iterator it{};
                 // Get the latest version.
                 if (version == -1)
                 {
@@ -165,13 +164,13 @@ namespace ngraph
                 }
                 while (version > 0)
                 {
-                    it = map.find(version--);
+                    std::map<std::int64_t, Operator>::const_iterator it = map.find(version--);
                     if (it != std::end(map))
                     {
                         return it;
                     }
                 }
-                return it;
+                return std::end(map);
             }
         }
 
diff --git a/ngraph/test/file_util.cpp b/ngraph/test/file_util.cpp
index a573e31b1f2..ff676169c9d 100644
--- a/ngraph/test/file_util.cpp
+++ b/ngraph/test/file_util.cpp
@@ -89,9 +89,3 @@ TEST(file_util, path_join)
         EXPECT_STREQ("/test1/test2", file_util::path_join(s1, s2).c_str());
     }
 }
-
-TEST(file_util, get_temp_directory_path)
-{
-    string tmp = file_util::get_temp_directory_path();
-    EXPECT_NE(0, tmp.size());
-}
diff --git a/ngraph/test/runtime/ie/ie_backend.cpp b/ngraph/test/runtime/ie/ie_backend.cpp
index 27adc6eec65..20a0f58b993 100644
--- a/ngraph/test/runtime/ie/ie_backend.cpp
+++ b/ngraph/test/runtime/ie/ie_backend.cpp
@@ -73,6 +73,8 @@ shared_ptr<runtime::Tensor> runtime::ie::IE_Backend::create_tensor(
     const element::Type& element_type, const Shape& shape, void* data)
 {
     shared_ptr<runtime::Tensor> tensor = make_shared<IETensor>(element_type, shape);
+    if (tensor == nullptr)
+        throw runtime_error("Cannot create IETensor!");
     tensor->write(data, shape_size(shape) * element_type.size());
     return tensor;
 }
diff --git a/ngraph/test/runtime/ie/ie_executable.cpp b/ngraph/test/runtime/ie/ie_executable.cpp
index 2ba251deabe..d3f959cd7a3 100644
--- a/ngraph/test/runtime/ie/ie_executable.cpp
+++ b/ngraph/test/runtime/ie/ie_executable.cpp
@@ -150,7 +150,10 @@ bool runtime::ie::IE_Executable::call(const vector<shared_ptr<runtime::Tensor>>&
     }
 
     //  Prepare output blobs
-    string output_name = m_network.getOutputsInfo().begin()->first;
+    auto outInfo = m_network.getOutputsInfo();
+    if (outInfo.size() != 1)
+        THROW_IE_EXCEPTION << "Networks should contain only one output!";
+    string output_name = outInfo.begin()->first;
 
     infer_request.Infer();
     InferenceEngine::Blob::Ptr output = infer_request.GetBlob(output_name);