diff --git a/src/plugins/autotest/testresultdelegate.cpp b/src/plugins/autotest/testresultdelegate.cpp
index ebef913f183..34bd6188a86 100644
--- a/src/plugins/autotest/testresultdelegate.cpp
+++ b/src/plugins/autotest/testresultdelegate.cpp
@@ -183,9 +183,12 @@ void TestResultDelegate::currentChanged(const QModelIndex &current, const QModel
 
 void TestResultDelegate::clearCache()
 {
+    const QModelIndex current = m_lastProcessedIndex;
     m_lastProcessedIndex = QModelIndex();
     m_lastProcessedFont = QFont();
     m_lastWidth = -1;
+    if (current.isValid())
+        emit sizeHintChanged(current);
 }
 
 void TestResultDelegate::recalculateTextLayout(const QModelIndex &index, const QString &output,
diff --git a/src/plugins/autotest/testresultspane.cpp b/src/plugins/autotest/testresultspane.cpp
index 4bbface7aa2..d3b3691b764 100644
--- a/src/plugins/autotest/testresultspane.cpp
+++ b/src/plugins/autotest/testresultspane.cpp
@@ -166,6 +166,7 @@ TestResultsPane::TestResultsPane(QObject *parent) :
             this, &TestResultsPane::addTestResult);
     connect(TestRunner::instance(), &TestRunner::hadDisabledTests,
             m_model, &TestResultModel::raiseDisabledTests);
+    visualOutputWidget->installEventFilter(this);
 }
 
 void TestResultsPane::createToolButtons()
@@ -576,6 +577,14 @@ void TestResultsPane::filterMenuTriggered(QAction *action)
     navigateStateChanged();
 }
 
+bool TestResultsPane::eventFilter(QObject *object, QEvent *event)
+{
+    QTC_ASSERT(m_outputWidget, return false);
+    if (event->type() == QEvent::Resize && object->parent() == m_outputWidget)
+        static_cast<TestResultDelegate *>(m_treeView->itemDelegate())->clearCache();
+    return false;
+}
+
 void TestResultsPane::onTestRunStarted()
 {
     m_testRunning = true;
diff --git a/src/plugins/autotest/testresultspane.h b/src/plugins/autotest/testresultspane.h
index b13796b5a9e..f28f1865f1b 100644
--- a/src/plugins/autotest/testresultspane.h
+++ b/src/plugins/autotest/testresultspane.h
@@ -105,6 +105,7 @@ private:
     void onRunSelectedTriggered();
     void checkAllFilter(bool checked);
     void filterMenuTriggered(QAction *action);
+    bool eventFilter(QObject *object, QEvent *event) override;
 
     void initializeFilterMenu();
     void updateSummaryLabel();