diff --git a/tests/auto/corelib/text/qregularexpression/tst_qregularexpression.cpp b/tests/auto/corelib/text/qregularexpression/tst_qregularexpression.cpp
index 684727758c3..6d844c18440 100644
--- a/tests/auto/corelib/text/qregularexpression/tst_qregularexpression.cpp
+++ b/tests/auto/corelib/text/qregularexpression/tst_qregularexpression.cpp
@@ -37,6 +37,7 @@
 #include <qregularexpression.h>
 #include <qthread.h>
 
+#include <iostream>
 #include <optional>
 
 Q_DECLARE_METATYPE(QRegularExpression::PatternOptions)
@@ -47,6 +48,9 @@ class tst_QRegularExpression : public QObject
 {
     Q_OBJECT
 
+public:
+    static void initMain();
+
 private slots:
     void defaultConstructors();
     void moveSemantics();
@@ -469,6 +473,16 @@ void tst_QRegularExpression::provideRegularExpressions()
                                                                      | QRegularExpression::InvertedGreedinessOption);
 }
 
+static const char enableJitEnvironmentVariable[] = "QT_ENABLE_REGEXP_JIT";
+
+void tst_QRegularExpression::initMain()
+{
+    if (!qEnvironmentVariableIsSet(enableJitEnvironmentVariable)) {
+        std::cerr << "Enabling QRegularExpression JIT for testing; set QT_ENABLE_REGEXP_JIT to 0 to disable it.\n";
+        qputenv(enableJitEnvironmentVariable, "1");
+    }
+}
+
 void tst_QRegularExpression::defaultConstructors()
 {
     QRegularExpression re;