diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index 9a403e8eef1..a93c72a9333 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -1509,7 +1509,7 @@ int QComboBox::maxCount() const
 /*!
     \obsolete
 
-    Use setCompleter() instead.
+    Use completer() instead.
 */
 bool QComboBox::autoCompletion() const
 {
diff --git a/src/widgets/widgets/qcombobox.h b/src/widgets/widgets/qcombobox.h
index 64fbebb3c5b..33686e547d2 100644
--- a/src/widgets/widgets/qcombobox.h
+++ b/src/widgets/widgets/qcombobox.h
@@ -96,10 +96,13 @@ public:
 
 #if QT_CONFIG(completer)
 #if QT_DEPRECATED_SINCE(5, 13)
+    QT_DEPRECATED_X("Use completer() instead.")
     bool autoCompletion() const;
+    QT_DEPRECATED_X("Use setCompleter() instead.")
     void setAutoCompletion(bool enable);
-
+    QT_DEPRECATED_X("Use completer()->caseSensitivity() instead.")
     Qt::CaseSensitivity autoCompletionCaseSensitivity() const;
+    QT_DEPRECATED_X("Use completer()->setCaseSensitivity() instead.")
     void setAutoCompletionCaseSensitivity(Qt::CaseSensitivity sensitivity);
 #endif
 #endif
diff --git a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
index 5b4761ba87d..a5767708119 100644
--- a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
+++ b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
@@ -852,8 +852,8 @@ void tst_QComboBox::autoCompletionCaseSensitivity()
     // case insensitive
     testWidget->clearEditText();
     QSignalSpy spyReturn(testWidget, SIGNAL(activated(int)));
-    testWidget->setAutoCompletionCaseSensitivity(Qt::CaseInsensitive);
-    QCOMPARE(testWidget->autoCompletionCaseSensitivity(), Qt::CaseInsensitive);
+    testWidget->completer()->setCaseSensitivity(Qt::CaseInsensitive);
+    QCOMPARE(testWidget->completer()->caseSensitivity(), Qt::CaseInsensitive);
 
     QTest::keyClick(testWidget->lineEdit(), Qt::Key_A);
     qApp->processEvents();
@@ -886,8 +886,8 @@ void tst_QComboBox::autoCompletionCaseSensitivity()
 
     // case sensitive
     testWidget->clearEditText();
-    testWidget->setAutoCompletionCaseSensitivity(Qt::CaseSensitive);
-    QCOMPARE(testWidget->autoCompletionCaseSensitivity(), Qt::CaseSensitive);
+    testWidget->completer()->setCaseSensitivity(Qt::CaseSensitive);
+    QCOMPARE(testWidget->completer()->caseSensitivity(), Qt::CaseSensitive);
     QTest::keyClick(testWidget->lineEdit(), Qt::Key_A);
     qApp->processEvents();
     QCOMPARE(testWidget->currentText(), QString("aww"));