diff --git a/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfMatrixTranspose.cpp b/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfMatrixTranspose.cpp
index ad79b2a1a3..d4520b5f9a 100644
--- a/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfMatrixTranspose.cpp
+++ b/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfMatrixTranspose.cpp
@@ -261,8 +261,8 @@ void OCLPerfMatrixTranspose::run(void) {
 
   _perfInfo = (float)perf;
   testDescString = "";
-  char str[64];
-  sprintf(str, "(%d,%d) matrix with (%2d,%2d) block size %fms (GB/s) ", width_, height_, blockSize_,
+  char str[90];
+  snprintf(str, sizeof(str), "(%d,%d) matrix with (%2d,%2d) block size %fms (GB/s) ", width_, height_, blockSize_,
           blockSize_, (sec / (double)MAX_ITERATIONS) * 1000.);
   testDescString += str;
 }
diff --git a/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfSHA256.cpp b/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfSHA256.cpp
index 28ec411837..0b98145713 100644
--- a/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfSHA256.cpp
+++ b/projects/clr/opencl/tests/ocltst/module/perf/OCLPerfSHA256.cpp
@@ -777,8 +777,8 @@ void OCLPerfSHA256::run(void) {
   }
 
   testDescString += "with ";
-  char str[40];
-  sprintf(str, "%2d ip buff and %2d op buff ", num_input_buf_, num_output_buf_);
+  char str[45];
+  snprintf(str, sizeof(str), "%2d ip buff and %2d op buff ", num_input_buf_, num_output_buf_);
   testDescString += str;
 }
 
diff --git a/projects/clr/opencl/tests/ocltst/module/runtime/OCLThreadTrace.cpp b/projects/clr/opencl/tests/ocltst/module/runtime/OCLThreadTrace.cpp
index 4476dc246d..517d98237d 100644
--- a/projects/clr/opencl/tests/ocltst/module/runtime/OCLThreadTrace.cpp
+++ b/projects/clr/opencl/tests/ocltst/module/runtime/OCLThreadTrace.cpp
@@ -187,9 +187,9 @@ static void CL_CALLBACK notify_callback(const char* errinfo, const void* private
 
 static void DumpTraceSI(unsigned int index, cl_ushort* tracePtr, size_t numOfBytes) {
   FILE* outFile;
-  char file_name[16] = {0};
+  char file_name[31] = {0};
   static unsigned int iii = 0;
-  sprintf(file_name, "TTrace%d%d.out", index, iii++);
+  snprintf(file_name, sizeof(file_name), "TTrace%d%d.out", index, iii++);
 
   outFile = fopen(file_name, "w");