diff --git a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
index 9d2af3755e8..cacd5276910 100644
--- a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
+++ b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
@@ -1377,7 +1377,7 @@ template <typename T> constexpr bool is_null(const T &str)
     else
         return str.isNull();
 }
-template <> constexpr bool is_null(const char &str) { return false; }
+template <> constexpr bool is_null(const char &) { return false; }
 
 } // namespace help