diff --git a/tests/libfuzzer/gui/painting/qcolorspace/fromiccprofile/main.cpp b/tests/libfuzzer/gui/painting/qcolorspace/fromiccprofile/main.cpp
index f663727d1a..8a588c6e21 100644
--- a/tests/libfuzzer/gui/painting/qcolorspace/fromiccprofile/main.cpp
+++ b/tests/libfuzzer/gui/painting/qcolorspace/fromiccprofile/main.cpp
@@ -26,14 +26,16 @@
 **
 ****************************************************************************/
 
+#include <cstdlib>
+
 #include <QGuiApplication>
 #include <QColorSpace>
 
-// Run this with
-// QT_LOGGING_RULES="qt.gui.icc=false"
-// to reduce noise and increase speed.
-
 extern "C" int LLVMFuzzerTestOneInput(const char *data, size_t size) {
+    // to reduce noise and increase speed
+    static char quiet[] = "QT_LOGGING_RULES=qt.gui.icc=false";
+    static int pe = putenv(quiet);
+    Q_UNUSED(pe)
     static int argc = 3;
     static char arg1[] = "fuzzer";
     static char arg2[] = "-platform";