diff --git a/tests/test_document.cpp b/tests/test_document.cpp
index 0e0bad4..6d016c3 100644
--- a/tests/test_document.cpp
+++ b/tests/test_document.cpp
@@ -736,7 +736,7 @@ struct temp_file
 	temp_file()
 	{
 		static int index = 0;
-		sprintf(path, "%stempfile%d", test_runner::_temp_path, index++);
+		snprintf(path, sizeof(path), "%stempfile%d", test_runner::_temp_path, index++);
 	}
 
 	~temp_file()
diff --git a/tests/test_dom_traverse.cpp b/tests/test_dom_traverse.cpp
index 4a2403d..b83aa74 100644
--- a/tests/test_dom_traverse.cpp
+++ b/tests/test_dom_traverse.cpp
@@ -795,7 +795,7 @@ struct test_walker: xml_tree_walker
 	std::basic_string<char_t> depthstr() const
 	{
 		char buf[32];
-		sprintf(buf, "%d", depth());
+		snprintf(buf, sizeof(buf), "%d", depth());
 
 	#ifdef PUGIXML_WCHAR_MODE
 		wchar_t wbuf[32];