diff --git a/tests/auto/testlib/selftests/silent_fatal/tst_silent_fatal.cpp b/tests/auto/testlib/selftests/silent_fatal/tst_silent_fatal.cpp
index 57aa1f702cc..a7b4324992d 100644
--- a/tests/auto/testlib/selftests/silent_fatal/tst_silent_fatal.cpp
+++ b/tests/auto/testlib/selftests/silent_fatal/tst_silent_fatal.cpp
@@ -5,6 +5,29 @@
 #include <QTest>
 #include <private/qtestlog_p.h>
 
+#if defined(Q_OS_WIN) && defined(Q_CC_MSVC)
+#  include <crtdbg.h>
+#endif
+#ifdef Q_OS_UNIX
+#  include <sys/resource.h>
+#  include <unistd.h>
+#endif
+
+void disableCoreDumps()
+{
+#if defined(Q_OS_WIN) && defined(Q_CC_MSVC)
+    // Windows: Suppress crash notification dialog.
+    _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG);
+#elif defined(RLIMIT_CORE)
+    // Unix: set our core dump limit to zero to request no dialogs.
+    if (struct rlimit rlim; getrlimit(RLIMIT_CORE, &rlim) == 0) {
+        rlim.rlim_cur = 0;
+        setrlimit(RLIMIT_CORE, &rlim);
+    }
+#endif
+}
+Q_CONSTRUCTOR_FUNCTION(disableCoreDumps)
+
 class tst_SilentFatal : public QObject
 {
     Q_OBJECT