diff --git a/test/src/unit-regression2.cpp b/test/src/unit-regression2.cpp
index 96bf6c872..56bb3f398 100644
--- a/test/src/unit-regression2.cpp
+++ b/test/src/unit-regression2.cpp
@@ -166,16 +166,16 @@ class sax_no_exception : public nlohmann::detail::json_sax_dom_parser<json>
   public:
     explicit sax_no_exception(json& j) : nlohmann::detail::json_sax_dom_parser<json>(j, false) {}
 
-    static bool parse_error(std::size_t position, const std::string& last_token, const json::exception& ex)
+    static bool parse_error(std::size_t /*position*/, const std::string& /*last_token*/, const json::exception& ex)
     {
-        error_string = ex.what();
+        error_string = new std::string(ex.what());
         return false;
     }
 
-    static std::string error_string;
+    static std::string* error_string;
 };
 
-std::string sax_no_exception::error_string = "";
+std::string* sax_no_exception::error_string = nullptr;
 
 
 TEST_CASE("regression tests 2")
@@ -648,7 +648,8 @@ TEST_CASE("regression tests 2")
         sax_no_exception sax(j);
 
         CHECK (!json::sax_parse("xyz", &sax));
-        CHECK(sax_no_exception::error_string == "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'x'");
+        CHECK(*sax_no_exception::error_string == "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'x'");
+        delete sax_no_exception::error_string;
     }
 
     SECTION("issue #2825 - Properly constrain the basic_json conversion operator")