diff --git a/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibConOut.c b/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibConOut.c
index 139360ee16..cfb0c5972b 100644
--- a/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibConOut.c
+++ b/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibConOut.c
@@ -42,7 +42,7 @@ ReportOutput (
 
   Length = AsciiStrLen (Output);
   for (Index = 0; Index < Length; Index += (sizeof (AsciiString) - 1)) {
-    AsciiStrCpyS (AsciiString, sizeof (AsciiString), &Output[Index]);
+    AsciiStrnCpyS (AsciiString, sizeof (AsciiString), &Output[Index], sizeof (AsciiString) - 1);
     ReportPrint ("%a", AsciiString);
   }
 }
diff --git a/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibDebugLib.c b/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibDebugLib.c
index 743aad2958..1402d0ef83 100644
--- a/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibDebugLib.c
+++ b/UnitTestFrameworkPkg/Library/UnitTestResultReportLib/UnitTestResultReportLibDebugLib.c
@@ -41,7 +41,7 @@ ReportOutput (
 
   Length = AsciiStrLen (Output);
   for (Index = 0; Index < Length; Index += (sizeof (AsciiString) - 1)) {
-    AsciiStrCpyS (AsciiString, sizeof (AsciiString), &Output[Index]);
+    AsciiStrnCpyS (AsciiString, sizeof (AsciiString), &Output[Index], sizeof (AsciiString) - 1);
     DEBUG ((DEBUG_INFO, AsciiString));
   }
 }