diff --git a/tests/auto/corelib/text/qchar/CMakeLists.txt b/tests/auto/corelib/text/qchar/CMakeLists.txt
index 03b99356ea8..de10b49625f 100644
--- a/tests/auto/corelib/text/qchar/CMakeLists.txt
+++ b/tests/auto/corelib/text/qchar/CMakeLists.txt
@@ -14,10 +14,20 @@ endif()
 # Collect test data
 list(APPEND test_data "data/NormalizationTest.txt")
 
-qt_internal_add_test(tst_qchar
-    SOURCES
-        tst_qchar.cpp
-    LIBRARIES
-        Qt::CorePrivate
-    TESTDATA ${test_data}
+foreach(test tst_qchar tst_qchar_restricted_ascii)
+    qt_internal_add_test(${test}
+        NO_BATCH
+        SOURCES
+           tst_qchar.cpp
+        LIBRARIES
+            Qt::CorePrivate
+        TESTDATA
+            ${test_data}
+    )
+endforeach()
+
+qt_internal_extend_target(tst_qchar_restricted_ascii
+    DEFINES
+        QT_RESTRICTED_CAST_FROM_ASCII
+        tst_QChar=tst_QChar_restricted_ascii
 )
diff --git a/tests/auto/corelib/text/qchar/tst_qchar.cpp b/tests/auto/corelib/text/qchar/tst_qchar.cpp
index 3428988f858..c6ae668ca6d 100644
--- a/tests/auto/corelib/text/qchar/tst_qchar.cpp
+++ b/tests/auto/corelib/text/qchar/tst_qchar.cpp
@@ -6,6 +6,7 @@
 #include <qfile.h>
 #include <qstringlist.h>
 
+#include <climits>
 #include <type_traits>
 
 template <typename C>
@@ -33,7 +34,11 @@ static_assert(explicitly<char32_t>);
 //
 // Conversion from others
 //
+#if defined(QT_RESTRICTED_CAST_FROM_ASCII)
+static_assert(explicitly<uchar>); // via integer promotion
+#else
 static_assert(explicitly<uchar>);
+#endif
 static_assert(implicitly<short>);
 static_assert(implicitly<ushort>);
 static_assert(explicitly<int>);