diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index 908155e8b5..9ab12c5c68 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -1497,7 +1497,7 @@ void TestMethods::invokeTests(QObject *testObject) const
     QTestResult::setCurrentTestFunction(nullptr);
 }
 
-#if defined(Q_OS_UNIX)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_WASM)
 class FatalSignalHandler
 {
 public:
@@ -1897,7 +1897,7 @@ int QTest::qRun()
     } else
 #endif
     {
-#if defined(Q_OS_UNIX)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_WASM)
         QScopedPointer<FatalSignalHandler> handler;
         if (!noCrashHandler)
             handler.reset(new FatalSignalHandler);