diff --git a/src/plugins/autotest/qtest/qttestvisitors.h b/src/plugins/autotest/qtest/qttestvisitors.h
index 608008750dc..756ba17b9e2 100644
--- a/src/plugins/autotest/qtest/qttestvisitors.h
+++ b/src/plugins/autotest/qtest/qttestvisitors.h
@@ -34,7 +34,7 @@ public:
 private:
     CppEditor::SymbolFinder m_symbolFinder;
     QString m_className;
-    CPlusPlus::Snapshot m_snapshot;
+    const CPlusPlus::Snapshot &m_snapshot;
     QMap<QString, QtTestCodeLocationAndType> m_privSlots;
     bool m_valid = false;
     bool m_inherited = false;
@@ -55,7 +55,7 @@ private:
     QStringList m_classNames;
     CPlusPlus::Scope *m_currentScope = nullptr;
     CPlusPlus::Document::Ptr m_currentDoc;
-    CPlusPlus::Snapshot m_snapshot;
+    const CPlusPlus::Snapshot &m_snapshot;
 };
 
 class TestDataFunctionVisitor : public CPlusPlus::ASTVisitor
diff --git a/src/plugins/autotest/quick/quicktestvisitors.h b/src/plugins/autotest/quick/quicktestvisitors.h
index 71d4b91496f..58dae69e921 100644
--- a/src/plugins/autotest/quick/quicktestvisitors.h
+++ b/src/plugins/autotest/quick/quicktestvisitors.h
@@ -45,7 +45,7 @@ public:
 
 private:
     QmlJS::Document::Ptr m_currentDoc;
-    QmlJS::Snapshot m_snapshot;
+    const QmlJS::Snapshot &m_snapshot;
     QStack<QuickTestCaseSpec> m_caseParseStack;
     QVector<QuickTestCaseSpec> m_testCases;
     QStack<bool> m_objectIsTestStack;
@@ -64,7 +64,7 @@ public:
 private:
     QString m_testBaseName;
     CPlusPlus::Document::Ptr m_currentDoc;
-    CPlusPlus::Snapshot m_snapshot;
+    const CPlusPlus::Snapshot &m_snapshot;
 };
 
 } // namespace Internal