diff --git a/test/src/unit-items.cpp b/test/src/unit-items.cpp
index 12ef5e65e..1b0367bfa 100644
--- a/test/src/unit-items.cpp
+++ b/test/src/unit-items.cpp
@@ -41,7 +41,7 @@ using nlohmann::json;
 
 // This test suite uses range for loops where values are copied. This is inefficient in usual code, but required to achieve 100% coverage.
 DOCTEST_GCC_SUPPRESS_WARNING_PUSH
-DOCTEST_GCC_SUPPRESS_WARNING(-Wrange-loop-construct)
+DOCTEST_GCC_SUPPRESS_WARNING("-Wrange-loop-construct")
 
 TEST_CASE("iterator_wrapper")
 {