diff --git a/src/plugins/baremetal/gdbserverprovidermanager.cpp b/src/plugins/baremetal/gdbserverprovidermanager.cpp
index 16758ee30ce..cd4f199508f 100644
--- a/src/plugins/baremetal/gdbserverprovidermanager.cpp
+++ b/src/plugins/baremetal/gdbserverprovidermanager.cpp
@@ -77,6 +77,7 @@ GdbServerProviderManager::~GdbServerProviderManager()
 {
     qDeleteAll(m_providers);
     m_providers.clear();
+    qDeleteAll(m_factories);
     delete m_writer;
     m_instance = nullptr;
 }
diff --git a/src/plugins/debugger/debuggermainwindow.cpp b/src/plugins/debugger/debuggermainwindow.cpp
index b77a2536a6b..ce01d5a5a9e 100644
--- a/src/plugins/debugger/debuggermainwindow.cpp
+++ b/src/plugins/debugger/debuggermainwindow.cpp
@@ -131,6 +131,7 @@ class DebuggerMainWindowPrivate : public QObject
 {
 public:
     DebuggerMainWindowPrivate(DebuggerMainWindow *parent);
+    ~DebuggerMainWindowPrivate();
 
     void selectPerspective(Perspective *perspective);
     void depopulateCurrentPerspective();
@@ -256,6 +257,11 @@ DebuggerMainWindowPrivate::DebuggerMainWindowPrivate(DebuggerMainWindow *parent)
     });
 }
 
+DebuggerMainWindowPrivate::~DebuggerMainWindowPrivate()
+{
+    delete m_editorPlaceHolder;
+}
+
 DebuggerMainWindow::DebuggerMainWindow()
     : d(new DebuggerMainWindowPrivate(this))
 {
diff --git a/src/plugins/debugger/debuggerrunconfigurationaspect.cpp b/src/plugins/debugger/debuggerrunconfigurationaspect.cpp
index b7a6c697cfb..702fe98c84c 100644
--- a/src/plugins/debugger/debuggerrunconfigurationaspect.cpp
+++ b/src/plugins/debugger/debuggerrunconfigurationaspect.cpp
@@ -220,6 +220,14 @@ DebuggerRunConfigurationAspect::DebuggerRunConfigurationAspect(Target *target)
     m_overrideStartupAspect->setLabelText(tr("Additional startup commands:"));
 }
 
+DebuggerRunConfigurationAspect::~DebuggerRunConfigurationAspect()
+{
+    delete m_cppAspect;
+    delete m_qmlAspect;
+    delete m_multiProcessAspect;
+    delete m_overrideStartupAspect;
+}
+
 void DebuggerRunConfigurationAspect::setUseQmlDebugger(bool value)
 {
     m_qmlAspect->setValue(value);
diff --git a/src/plugins/debugger/debuggerrunconfigurationaspect.h b/src/plugins/debugger/debuggerrunconfigurationaspect.h
index e34185d39e4..58619ee3ef1 100644
--- a/src/plugins/debugger/debuggerrunconfigurationaspect.h
+++ b/src/plugins/debugger/debuggerrunconfigurationaspect.h
@@ -42,6 +42,7 @@ class DEBUGGER_EXPORT DebuggerRunConfigurationAspect
 
 public:
     DebuggerRunConfigurationAspect(ProjectExplorer::Target *target);
+    ~DebuggerRunConfigurationAspect();
 
     void fromMap(const QVariantMap &map) override;
     void toMap(QVariantMap &map) const override;
diff --git a/src/plugins/projectexplorer/jsonwizard/jsonwizard_test.cpp b/src/plugins/projectexplorer/jsonwizard/jsonwizard_test.cpp
index 9a5947cdd1b..073432ab26c 100644
--- a/src/plugins/projectexplorer/jsonwizard/jsonwizard_test.cpp
+++ b/src/plugins/projectexplorer/jsonwizard/jsonwizard_test.cpp
@@ -94,12 +94,16 @@ auto findComboBox(Utils::Wizard *wizard, const QString &objectName) {
 };
 
 } // namespace
+
+struct FactoryDeleter { void operator()(ProjectExplorer::JsonWizardFactory *f) { f->deleteLater(); } };
+using FactoryPtr = std::unique_ptr<ProjectExplorer::JsonWizardFactory, FactoryDeleter>;
+
 void ProjectExplorer::ProjectExplorerPlugin::testJsonWizardsEmptyWizard()
 {
     QString errorMessage;
     const QJsonObject wizard = createGeneralWizard(QJsonObject());
 
-    JsonWizardFactory *factory = ProjectExplorer::JsonWizardFactory::createWizardFactory(wizard.toVariantMap(), QDir(), &errorMessage);
+    const FactoryPtr factory(ProjectExplorer::JsonWizardFactory::createWizardFactory(wizard.toVariantMap(), QDir(), &errorMessage));
     QVERIFY(factory == nullptr);
     QCOMPARE(qPrintable(errorMessage), "Page has no typeId set.");
 }
@@ -110,7 +114,7 @@ void ProjectExplorer::ProjectExplorerPlugin::testJsonWizardsEmptyPage()
     const QJsonObject pages = createFieldPageJsonObject(QJsonArray());
     const QJsonObject wizard = createGeneralWizard(pages);
 
-    JsonWizardFactory *factory = ProjectExplorer::JsonWizardFactory::createWizardFactory(wizard.toVariantMap(), QDir(), &errorMessage);
+    const FactoryPtr factory(JsonWizardFactory::createWizardFactory(wizard.toVariantMap(), QDir(), &errorMessage));
     QVERIFY(factory == nullptr);
     QCOMPARE(qPrintable(errorMessage), "When parsing fields of page \"PE.Wizard.Page.Fields\": ");
 }
@@ -143,7 +147,7 @@ void ProjectExplorer::ProjectExplorerPlugin::testJsonWizardsUnusedKeyAtFields()
     const QJsonObject wizard = createGeneralWizard(pages);
 
     QTest::ignoreMessage(QtWarningMsg, QRegularExpression("has unsupported keys: wrong"));
-    JsonWizardFactory *factory = ProjectExplorer::JsonWizardFactory::createWizardFactory(wizard.toVariantMap(), QDir(), &errorMessage);
+    const FactoryPtr factory(JsonWizardFactory::createWizardFactory(wizard.toVariantMap(), QDir(), &errorMessage));
     QVERIFY(factory);
     QVERIFY(errorMessage.isEmpty());
 }
@@ -166,7 +170,7 @@ void ProjectExplorer::ProjectExplorerPlugin::testJsonWizardsCheckBox()
     });
     const QJsonObject pages = createFieldPageJsonObject(widgets);
     const QJsonObject wizardObject = createGeneralWizard(pages);
-    JsonWizardFactory *factory = ProjectExplorer::JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage);
+    const FactoryPtr factory(JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage));
     QVERIFY2(factory, qPrintable(errorMessage));
 
     Utils::Wizard *wizard = factory->runWizard(QString(), &parent, Core::Id(), QVariantMap());
@@ -198,7 +202,7 @@ void ProjectExplorer::ProjectExplorerPlugin::testJsonWizardsLineEdit()
     });
     const QJsonObject pages = createFieldPageJsonObject(widgets);
     const QJsonObject wizardObject = createGeneralWizard(pages);
-    JsonWizardFactory *factory = ProjectExplorer::JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage);
+    const FactoryPtr factory(JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage));
     QVERIFY2(factory, qPrintable(errorMessage));
 
     Utils::Wizard *wizard = factory->runWizard(QString(), &parent, Core::Id(), QVariantMap());
@@ -227,7 +231,7 @@ void ProjectExplorer::ProjectExplorerPlugin::testJsonWizardsComboBox()
 
     const QJsonObject pages = createFieldPageJsonObject(widgets);
     const QJsonObject wizardObject = createGeneralWizard(pages);
-    JsonWizardFactory *factory = ProjectExplorer::JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage);
+    const FactoryPtr factory(JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage));
     QVERIFY2(factory, qPrintable(errorMessage));
     Utils::Wizard *wizard = factory->runWizard(QString(), &parent, Core::Id(), QVariantMap());
 
@@ -285,7 +289,7 @@ void ProjectExplorer::ProjectExplorerPlugin::testJsonWizardsIconList()
 
     const QJsonObject pages = createFieldPageJsonObject(widgets);
     const QJsonObject wizardObject = createGeneralWizard(pages);
-    JsonWizardFactory *factory = ProjectExplorer::JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage);
+    const FactoryPtr factory(JsonWizardFactory::createWizardFactory(wizardObject.toVariantMap(), QDir(), &errorMessage));
     QVERIFY2(factory, qPrintable(errorMessage));
     Utils::Wizard *wizard = factory->runWizard(QString(), &parent, Core::Id(), QVariantMap());
 
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index 439e5f03a5a..0880e3c3e5d 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -639,6 +639,10 @@ ProjectExplorerPlugin::~ProjectExplorerPlugin()
     delete dd;
     dd = nullptr;
     m_instance = nullptr;
+
+#ifdef WITH_TESTS
+    deleteTestToolchains();
+#endif
 }
 
 ProjectExplorerPlugin *ProjectExplorerPlugin::instance()
diff --git a/src/plugins/projectexplorer/projectexplorer.h b/src/plugins/projectexplorer/projectexplorer.h
index 32531e094b8..feb53ccdef2 100644
--- a/src/plugins/projectexplorer/projectexplorer.h
+++ b/src/plugins/projectexplorer/projectexplorer.h
@@ -243,6 +243,7 @@ private slots:
 
     void testToolChainMerging_data();
     void testToolChainMerging();
+    void deleteTestToolchains();
 
     void testUserFileAccessor_prepareToReadSettings();
     void testUserFileAccessor_prepareToReadSettingsObsoleteVersion();
diff --git a/src/plugins/projectexplorer/targetsetuppage.cpp b/src/plugins/projectexplorer/targetsetuppage.cpp
index 2895a2983e5..ff317be5e6e 100644
--- a/src/plugins/projectexplorer/targetsetuppage.cpp
+++ b/src/plugins/projectexplorer/targetsetuppage.cpp
@@ -241,6 +241,7 @@ TargetSetupPage::~TargetSetupPage()
 {
     disconnect();
     reset();
+    delete m_spacer;
     delete m_ui;
 }
 
diff --git a/src/plugins/projectexplorer/toolchainsettingsaccessor.cpp b/src/plugins/projectexplorer/toolchainsettingsaccessor.cpp
index ea5a07f0fe1..78fafb5ea75 100644
--- a/src/plugins/projectexplorer/toolchainsettingsaccessor.cpp
+++ b/src/plugins/projectexplorer/toolchainsettingsaccessor.cpp
@@ -309,7 +309,7 @@ public:
         setTypeDisplayName("Test Tool Chain");
     }
 
-    static QList<TTC *> toolChains();
+    static QList<TTC *> toolChains() { return m_toolChains; }
     static bool hasToolChains() { return !m_toolChains.isEmpty(); }
 
     Abi targetAbi() const override { return Abi::hostAbi(); }
@@ -507,6 +507,11 @@ void ProjectExplorerPlugin::testToolChainMerging()
              Utils::toSet(ops.toRegister + ops.toDemote + ops.toDelete));
 }
 
+void ProjectExplorerPlugin::deleteTestToolchains()
+{
+    qDeleteAll(TTC::toolChains());
+}
+
 } // namespace ProjectExplorer
 
 #endif // WITH_TESTS