diff --git a/src/plugins/python/pipsupport.cpp b/src/plugins/python/pipsupport.cpp
index 1ece0c534ca..ea78e884869 100644
--- a/src/plugins/python/pipsupport.cpp
+++ b/src/plugins/python/pipsupport.cpp
@@ -221,7 +221,7 @@ QFuture<PipPackageInfo> Pip::info(const PipPackage &package)
 }
 
 Pip::Pip(const Utils::FilePath &python)
-    : QObject(PythonPlugin::instance())
+    : QObject(pluginInstance())
     , m_python(python)
 {}
 
diff --git a/src/plugins/python/pyside.cpp b/src/plugins/python/pyside.cpp
index 8d3b1d31a38..5a46bc3049c 100644
--- a/src/plugins/python/pyside.cpp
+++ b/src/plugins/python/pyside.cpp
@@ -81,7 +81,7 @@ QString PySideInstaller::importedPySide(const QString &text)
 }
 
 PySideInstaller::PySideInstaller()
-    : QObject(PythonPlugin::instance())
+    : QObject(pluginInstance())
 {}
 
 void PySideInstaller::installPyside(const FilePath &python,
diff --git a/src/plugins/python/pythonlanguageclient.cpp b/src/plugins/python/pythonlanguageclient.cpp
index 5a54a8c4b64..aaf1e7c8a3d 100644
--- a/src/plugins/python/pythonlanguageclient.cpp
+++ b/src/plugins/python/pythonlanguageclient.cpp
@@ -265,7 +265,7 @@ PyLSClient *PyLSClient::clientForPython(const FilePath &python)
 
 PyLSConfigureAssistant *PyLSConfigureAssistant::instance()
 {
-    static auto *instance = new PyLSConfigureAssistant(PythonPlugin::instance());
+    static auto *instance = new PyLSConfigureAssistant(pluginInstance());
     return instance;
 }
 
diff --git a/src/plugins/python/pythonplugin.cpp b/src/plugins/python/pythonplugin.cpp
index d74c45b7784..61f1cc2421c 100644
--- a/src/plugins/python/pythonplugin.cpp
+++ b/src/plugins/python/pythonplugin.cpp
@@ -13,6 +13,8 @@
 #include "pythontr.h"
 #include "pythonwizardpage.h"
 
+#include <extensionsystem/iplugin.h>
+
 #include <projectexplorer/buildtargetinfo.h>
 #include <projectexplorer/jsonwizard/jsonwizardfactory.h>
 #include <projectexplorer/kitmanager.h>
@@ -28,7 +30,12 @@ using namespace Utils;
 
 namespace Python::Internal {
 
-static PythonPlugin *m_instance = nullptr;
+static QObject *m_instance = nullptr;
+
+QObject *pluginInstance()
+{
+    return m_instance;
+}
 
 class PythonPluginPrivate
 {
@@ -43,44 +50,51 @@ public:
     PythonWizardPageFactory pythonWizardPageFactory;
 };
 
-PythonPlugin::PythonPlugin()
+class PythonPlugin final : public ExtensionSystem::IPlugin
 {
-    m_instance = this;
-}
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "Python.json")
 
-PythonPlugin::~PythonPlugin()
-{
-    m_instance = nullptr;
-    delete d;
-}
+public:
+    PythonPlugin()
+    {
+        m_instance = this;
+    }
 
-PythonPlugin *PythonPlugin::instance()
-{
-    return m_instance;
-}
+    ~PythonPlugin() final
+    {
+        m_instance = nullptr;
+        delete d;
+    }
 
-void PythonPlugin::initialize()
-{
-    d = new PythonPluginPrivate;
+private:
+    void initialize() final
+    {
+        d = new PythonPluginPrivate;
 
-    KitManager::setIrrelevantAspects(KitManager::irrelevantAspects()
-                                     + QSet<Id>{PythonKitAspect::id()});
+        KitManager::setIrrelevantAspects(KitManager::irrelevantAspects()
+                                         + QSet<Id>{PythonKitAspect::id()});
 
-    ProjectManager::registerProjectType<PythonProject>(Constants::C_PY_PROJECT_MIME_TYPE);
-    ProjectManager::registerProjectType<PythonProject>(Constants::C_PY_PROJECT_MIME_TYPE_LEGACY);
-}
+        ProjectManager::registerProjectType<PythonProject>(Constants::C_PY_PROJECT_MIME_TYPE);
+        ProjectManager::registerProjectType<PythonProject>(Constants::C_PY_PROJECT_MIME_TYPE_LEGACY);
+    }
 
-void PythonPlugin::extensionsInitialized()
-{
-    // Add MIME overlay icons (these icons displayed at Project dock panel)
-    const QString imageFile = Utils::creatorTheme()->imageFile(Theme::IconOverlayPro,
-                                                               ::Constants::FILEOVERLAY_PY);
-    FileIconProvider::registerIconOverlayForSuffix(imageFile, "py");
+    void extensionsInitialized() final
+    {
+        // Add MIME overlay icons (these icons displayed at Project dock panel)
+        const QString imageFile = Utils::creatorTheme()->imageFile(Theme::IconOverlayPro,
+                                                                   ::Constants::FILEOVERLAY_PY);
+        FileIconProvider::registerIconOverlayForSuffix(imageFile, "py");
 
-    TaskHub::addCategory({PythonErrorTaskCategory,
-                          "Python",
-                          Tr::tr("Issues parsed from Python runtime output."),
-                          true});
-}
+        TaskHub::addCategory({PythonErrorTaskCategory,
+                              "Python",
+                              Tr::tr("Issues parsed from Python runtime output."),
+                              true});
+    }
+
+    PythonPluginPrivate *d = nullptr;
+};
 
 } // Python::Internal
+
+#include "pythonplugin.moc"
diff --git a/src/plugins/python/pythonplugin.h b/src/plugins/python/pythonplugin.h
index aefe24d2406..5fc13b6ae04 100644
--- a/src/plugins/python/pythonplugin.h
+++ b/src/plugins/python/pythonplugin.h
@@ -3,28 +3,10 @@
 
 #pragma once
 
-#include <extensionsystem/iplugin.h>
+#include <QObject>
 
 namespace Python::Internal {
 
-class PythonBuildConfigurationFactory;
-
-class PythonPlugin final : public ExtensionSystem::IPlugin
-{
-    Q_OBJECT
-    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "Python.json")
-
-public:
-    PythonPlugin();
-    ~PythonPlugin() final;
-
-    static PythonPlugin *instance();
-
-private:
-    void initialize() final;
-    void extensionsInitialized() final;
-
-    class PythonPluginPrivate *d = nullptr;
-};
+QObject *pluginInstance();
 
 } // Python::Internal
diff --git a/src/plugins/python/pythonsettings.cpp b/src/plugins/python/pythonsettings.cpp
index 16d800b9316..887e5ce44b0 100644
--- a/src/plugins/python/pythonsettings.cpp
+++ b/src/plugins/python/pythonsettings.cpp
@@ -642,7 +642,7 @@ static void disableOutdatedPyls()
         disableOutdatedPylsNow();
     } else {
         QObject::connect(PluginManager::instance(), &PluginManager::initializationDone,
-                         PythonPlugin::instance(), &disableOutdatedPylsNow);
+                         pluginInstance(), &disableOutdatedPylsNow);
     }
 }