diff --git a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
index 83a4051112e..e5ef78f401f 100644
--- a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
+++ b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
@@ -1209,7 +1209,7 @@ 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