diff --git a/src/plugins/autotest/qtest/qttestparser.cpp b/src/plugins/autotest/qtest/qttestparser.cpp
index b58f192c820..afcd25a5ae8 100644
--- a/src/plugins/autotest/qtest/qttestparser.cpp
+++ b/src/plugins/autotest/qtest/qttestparser.cpp
@@ -241,6 +241,12 @@ void QtTestParser::init(const QStringList &filesToParse)
     CppParser::init(filesToParse);
 }
 
+void QtTestParser::release()
+{
+    m_testCaseNames.clear();
+    CppParser::release();
+}
+
 bool QtTestParser::processDocument(QFutureInterface<TestParseResultPtr> futureInterface,
                                    const QString &fileName)
 {
diff --git a/src/plugins/autotest/qtest/qttestparser.h b/src/plugins/autotest/qtest/qttestparser.h
index acc53125231..a34a4b0431e 100644
--- a/src/plugins/autotest/qtest/qttestparser.h
+++ b/src/plugins/autotest/qtest/qttestparser.h
@@ -41,6 +41,7 @@ class QtTestParser : public CppParser
 {
 public:
     void init(const QStringList &filesToParse) override;
+    void release() override;
     bool processDocument(QFutureInterface<TestParseResultPtr> futureInterface,
                          const QString &fileName) override;
 
diff --git a/src/plugins/autotest/quick/quicktestparser.cpp b/src/plugins/autotest/quick/quicktestparser.cpp
index c31e54a34e4..f107a8772d2 100644
--- a/src/plugins/autotest/quick/quicktestparser.cpp
+++ b/src/plugins/autotest/quick/quicktestparser.cpp
@@ -224,6 +224,13 @@ void QuickTestParser::init(const QStringList &filesToParse)
     CppParser::init(filesToParse);
 }
 
+void QuickTestParser::release()
+{
+    m_qmlSnapshot = QmlJS::Snapshot();
+    m_proFilesForQmlFiles.clear();
+    CppParser::release();
+}
+
 bool QuickTestParser::processDocument(QFutureInterface<TestParseResultPtr> futureInterface,
                                       const QString &fileName)
 {
diff --git a/src/plugins/autotest/quick/quicktestparser.h b/src/plugins/autotest/quick/quicktestparser.h
index 8f1c5ed6a0c..2d2e1c866be 100644
--- a/src/plugins/autotest/quick/quicktestparser.h
+++ b/src/plugins/autotest/quick/quicktestparser.h
@@ -43,6 +43,7 @@ class QuickTestParser : public CppParser
 {
 public:
     void init(const QStringList &filesToParse) override;
+    void release() override;
     bool processDocument(QFutureInterface<TestParseResultPtr> futureInterface,
                          const QString &fileName) override;
 private: