diff --git a/src/plugins/mesonprojectmanager/CMakeLists.txt b/src/plugins/mesonprojectmanager/CMakeLists.txt
index 4cc66cab91b..07b63f93b42 100644
--- a/src/plugins/mesonprojectmanager/CMakeLists.txt
+++ b/src/plugins/mesonprojectmanager/CMakeLists.txt
@@ -57,8 +57,6 @@ add_qtc_plugin(MesonProjectManager
   toolssettingsaccessor.h
   toolssettingspage.cpp
   toolssettingspage.h
-  tooltreeitem.cpp
-  tooltreeitem.h
   versionhelper.h
 )
 
diff --git a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
index 619d6f26f0f..40c0c883a41 100644
--- a/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
+++ b/src/plugins/mesonprojectmanager/mesonprojectmanager.qbs
@@ -73,8 +73,6 @@ Project {
             "toolssettingsaccessor.h",
             "toolssettingspage.cpp",
             "toolssettingspage.h",
-            "tooltreeitem.cpp",
-            "tooltreeitem.h",
             "versionhelper.h",
         ]
     }
diff --git a/src/plugins/mesonprojectmanager/toolitemsettings.cpp b/src/plugins/mesonprojectmanager/toolitemsettings.cpp
index 1b66cc2d03d..021b08edb6e 100644
--- a/src/plugins/mesonprojectmanager/toolitemsettings.cpp
+++ b/src/plugins/mesonprojectmanager/toolitemsettings.cpp
@@ -4,7 +4,7 @@
 #include "toolitemsettings.h"
 
 #include "mesonprojectmanagertr.h"
-#include "tooltreeitem.h"
+#include "toolsmodel.h"
 
 #include <utils/layoutbuilder.h>
 #include <utils/pathchooser.h>
diff --git a/src/plugins/mesonprojectmanager/toolsmodel.cpp b/src/plugins/mesonprojectmanager/toolsmodel.cpp
index 372f61d435b..861ec4b58c5 100644
--- a/src/plugins/mesonprojectmanager/toolsmodel.cpp
+++ b/src/plugins/mesonprojectmanager/toolsmodel.cpp
@@ -3,24 +3,129 @@
 
 #include "toolsmodel.h"
 
-#include "tooltreeitem.h"
 #include "mesonprojectmanagertr.h"
 #include "mesontools.h"
 
 #include <projectexplorer/projectexplorerconstants.h>
+
 #include <utils/qtcassert.h>
 #include <utils/stringutils.h>
+#include <utils/utilsicons.h>
 
-namespace MesonProjectManager {
-namespace Internal {
+using namespace Utils;
+
+namespace MesonProjectManager::Internal {
+
+// ToolTreeItem
+
+ToolTreeItem::ToolTreeItem(const QString &name)
+    : m_name{name}
+    , m_id(Id::generate())
+    , m_autoDetected{false}
+    , m_unsavedChanges{true}
+{
+    self_check();
+    update_tooltip();
+}
+
+ToolTreeItem::ToolTreeItem(const MesonTools::Tool_t &tool)
+    : m_name{tool->name()}
+    , m_executable{tool->exe()}
+    , m_id{tool->id()}
+    , m_autoDetected{tool->autoDetected()}
+{
+    m_tooltip = Tr::tr("Version: %1").arg(tool->version().toQString());
+    self_check();
+}
+
+ToolTreeItem::ToolTreeItem(const ToolTreeItem &other)
+    : m_name{Tr::tr("Clone of %1").arg(other.m_name)}
+    , m_executable{other.m_executable}
+    , m_id{Id::generate()}
+    , m_autoDetected{false}
+    , m_unsavedChanges{true}
+{
+    self_check();
+    update_tooltip();
+}
+
+QVariant ToolTreeItem::data(int column, int role) const
+{
+    switch (role) {
+    case Qt::DisplayRole: {
+        switch (column) {
+        case 0: {
+            return m_name;
+        }
+        case 1: {
+            return m_executable.toUserOutput();
+        }
+        } // switch (column)
+        return QVariant();
+    }
+    case Qt::FontRole: {
+        QFont font;
+        font.setBold(m_unsavedChanges);
+        return font;
+    }
+    case Qt::ToolTipRole: {
+        if (!m_pathExists)
+            return Tr::tr("Meson executable path does not exist.");
+        if (!m_pathIsFile)
+            return Tr::tr("Meson executable path is not a file.");
+        if (!m_pathIsExecutable)
+            return Tr::tr("Meson executable path is not executable.");
+        return m_tooltip;
+    }
+    case Qt::DecorationRole: {
+        if (column == 0 && (!m_pathExists || !m_pathIsFile || !m_pathIsExecutable))
+            return Icons::CRITICAL.icon();
+        return {};
+    }
+    }
+    return {};
+}
+
+void ToolTreeItem::update(const QString &name, const FilePath &exe)
+{
+    m_unsavedChanges = true;
+    m_name = name;
+    if (exe != m_executable) {
+        m_executable = exe;
+        self_check();
+        update_tooltip();
+    }
+}
+
+void ToolTreeItem::self_check()
+{
+    m_pathExists = m_executable.exists();
+    m_pathIsFile = m_executable.toFileInfo().isFile();
+    m_pathIsExecutable = m_executable.toFileInfo().isExecutable();
+}
+
+void ToolTreeItem::update_tooltip(const Version &version)
+{
+    if (version.isValid)
+        m_tooltip = Tr::tr("Version: %1").arg(version.toQString());
+    else
+        m_tooltip = Tr::tr("Cannot get tool version.");
+}
+
+void ToolTreeItem::update_tooltip()
+{
+    update_tooltip(ToolWrapper::read_version(m_executable));
+}
+
+// ToolsModel
 
 ToolsModel::ToolsModel()
 {
     setHeader({Tr::tr("Name"), Tr::tr("Location")});
     rootItem()->appendChild(
-        new Utils::StaticTreeItem({ProjectExplorer::Constants::msgAutoDetected()},
-                                  {ProjectExplorer::Constants::msgAutoDetectedToolTip()}));
-    rootItem()->appendChild(new Utils::StaticTreeItem(ProjectExplorer::Constants::msgManual()));
+        new StaticTreeItem({ProjectExplorer::Constants::msgAutoDetected()},
+                           {ProjectExplorer::Constants::msgAutoDetectedToolTip()}));
+    rootItem()->appendChild(new StaticTreeItem(ProjectExplorer::Constants::msgManual()));
     for (const auto &tool : MesonTools::tools())
         addMesonToolHelper(tool);
 }
@@ -30,7 +135,7 @@ ToolTreeItem *ToolsModel::mesoneToolTreeItem(const QModelIndex &index) const
     return itemForIndexAtLevel<2>(index);
 }
 
-void ToolsModel::updateItem(const Utils::Id &itemId, const QString &name, const Utils::FilePath &exe)
+void ToolsModel::updateItem(const Id &itemId, const QString &name, const FilePath &exe)
 {
     auto treeItem = findItemAtLevel<2>([itemId](ToolTreeItem *n) { return n->id() == itemId; });
     QTC_ASSERT(treeItem, return );
@@ -45,7 +150,7 @@ void ToolsModel::addMesonTool()
 void ToolsModel::removeMesonTool(ToolTreeItem *item)
 {
     QTC_ASSERT(item, return );
-    const Utils::Id id = item->id();
+    const Id id = item->id();
     destroyItem(item);
     m_itemsToRemove.enqueue(id);
 }
@@ -83,19 +188,18 @@ void ToolsModel::addMesonToolHelper(const MesonTools::Tool_t &tool)
 QString ToolsModel::uniqueName(const QString &baseName)
 {
     QStringList names;
-    forItemsAtLevel<2>([&names](auto *item) { names << item->name(); });
+    forItemsAtLevel<2>([&names](ToolTreeItem *item) { names << item->name(); });
     return Utils::makeUniquelyNumbered(baseName, names);
 }
 
-Utils::TreeItem *ToolsModel::autoDetectedGroup() const
+TreeItem *ToolsModel::autoDetectedGroup() const
 {
     return rootItem()->childAt(0);
 }
 
-Utils::TreeItem *ToolsModel::manualGroup() const
+TreeItem *ToolsModel::manualGroup() const
 {
     return rootItem()->childAt(1);
 }
 
-} // namespace Internal
-} // namespace MesonProjectManager
+} // MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/toolsmodel.h b/src/plugins/mesonprojectmanager/toolsmodel.h
index c03d3d0cfa3..6e25a7af2b7 100644
--- a/src/plugins/mesonprojectmanager/toolsmodel.h
+++ b/src/plugins/mesonprojectmanager/toolsmodel.h
@@ -7,13 +7,40 @@
 
 #include <utils/treemodel.h>
 
-#include <QCoreApplication>
 #include <QQueue>
 
-namespace MesonProjectManager {
-namespace Internal {
+namespace MesonProjectManager::Internal {
 
-class ToolTreeItem;
+class ToolTreeItem final : public Utils::TreeItem
+{
+public:
+    ToolTreeItem(const QString &name);
+    ToolTreeItem(const MesonTools::Tool_t &tool);
+    ToolTreeItem(const ToolTreeItem &other);
+
+    QVariant data(int column, int role) const override;
+    bool isAutoDetected() const noexcept { return m_autoDetected; }
+    QString name() const noexcept { return m_name; }
+    Utils::FilePath executable() const noexcept { return m_executable; }
+    Utils::Id id() const noexcept { return m_id; }
+    bool hasUnsavedChanges() const noexcept { return m_unsavedChanges; }
+    void setSaved() { m_unsavedChanges = false; }
+    void update(const QString &name, const Utils::FilePath &exe);
+
+private:
+    void self_check();
+    void update_tooltip(const Version &version);
+    void update_tooltip();
+    QString m_name;
+    QString m_tooltip;
+    Utils::FilePath m_executable;
+    Utils::Id m_id;
+    bool m_autoDetected;
+    bool m_pathExists;
+    bool m_pathIsFile;
+    bool m_pathIsExecutable;
+    bool m_unsavedChanges = false;
+};
 
 class ToolsModel final : public Utils::TreeModel<Utils::TreeItem, Utils::TreeItem, ToolTreeItem>
 {
@@ -35,5 +62,4 @@ private:
     QQueue<Utils::Id> m_itemsToRemove;
 };
 
-} // namespace Internal
-} // namespace MesonProjectManager
+} // MesonProjectManager::Internal
diff --git a/src/plugins/mesonprojectmanager/toolssettingspage.cpp b/src/plugins/mesonprojectmanager/toolssettingspage.cpp
index 629513f8b5e..dd82899b404 100644
--- a/src/plugins/mesonprojectmanager/toolssettingspage.cpp
+++ b/src/plugins/mesonprojectmanager/toolssettingspage.cpp
@@ -7,7 +7,6 @@
 #include "mesonprojectmanagertr.h"
 #include "toolitemsettings.h"
 #include "toolsmodel.h"
-#include "tooltreeitem.h"
 
 #include <coreplugin/dialogs/ioptionspage.h>
 
diff --git a/src/plugins/mesonprojectmanager/tooltreeitem.cpp b/src/plugins/mesonprojectmanager/tooltreeitem.cpp
deleted file mode 100644
index bb042fc3c82..00000000000
--- a/src/plugins/mesonprojectmanager/tooltreeitem.cpp
+++ /dev/null
@@ -1,115 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#include "tooltreeitem.h"
-
-#include "mesonprojectmanagertr.h"
-
-#include <utils/utilsicons.h>
-
-#include <QFileInfo>
-
-namespace MesonProjectManager {
-namespace Internal {
-
-ToolTreeItem::ToolTreeItem(const QString &name)
-    : m_name{name}
-    , m_autoDetected{false}
-    , m_id(Utils::Id::generate())
-    , m_unsavedChanges{true}
-{
-    self_check();
-    update_tooltip();
-}
-
-ToolTreeItem::ToolTreeItem(const MesonTools::Tool_t &tool)
-    : m_name{tool->name()}
-    , m_executable{tool->exe()}
-    , m_autoDetected{tool->autoDetected()}
-    , m_id{tool->id()}
-{
-    m_tooltip = Tr::tr("Version: %1").arg(tool->version().toQString());
-    self_check();
-}
-
-ToolTreeItem::ToolTreeItem(const ToolTreeItem &other)
-    : m_name{Tr::tr("Clone of %1").arg(other.m_name)}
-    , m_executable{other.m_executable}
-    , m_autoDetected{false}
-    , m_id{Utils::Id::generate()}
-    , m_unsavedChanges{true}
-{
-    self_check();
-    update_tooltip();
-}
-
-QVariant ToolTreeItem::data(int column, int role) const
-{
-    switch (role) {
-    case Qt::DisplayRole: {
-        switch (column) {
-        case 0: {
-            return m_name;
-        }
-        case 1: {
-            return m_executable.toUserOutput();
-        }
-        } // switch (column)
-        return QVariant();
-    }
-    case Qt::FontRole: {
-        QFont font;
-        font.setBold(m_unsavedChanges);
-        return font;
-    }
-    case Qt::ToolTipRole: {
-        if (!m_pathExists)
-            return Tr::tr("Meson executable path does not exist.");
-        if (!m_pathIsFile)
-            return Tr::tr("Meson executable path is not a file.");
-        if (!m_pathIsExecutable)
-            return Tr::tr("Meson executable path is not executable.");
-        return m_tooltip;
-    }
-    case Qt::DecorationRole: {
-        if (column == 0 && (!m_pathExists || !m_pathIsFile || !m_pathIsExecutable))
-            return Utils::Icons::CRITICAL.icon();
-        return {};
-    }
-    }
-    return {};
-}
-
-void ToolTreeItem::update(const QString &name, const Utils::FilePath &exe)
-{
-    m_unsavedChanges = true;
-    m_name = name;
-    if (exe != m_executable) {
-        m_executable = exe;
-        self_check();
-        update_tooltip();
-    }
-}
-
-void ToolTreeItem::self_check()
-{
-    m_pathExists = m_executable.exists();
-    m_pathIsFile = m_executable.toFileInfo().isFile();
-    m_pathIsExecutable = m_executable.toFileInfo().isExecutable();
-}
-
-void ToolTreeItem::update_tooltip(const Version &version)
-{
-    if (version.isValid)
-        m_tooltip = Tr::tr("Version: %1").arg(version.toQString());
-    else
-        m_tooltip = Tr::tr("Cannot get tool version.");
-}
-
-void ToolTreeItem::update_tooltip()
-{
-    update_tooltip(ToolWrapper::read_version(m_executable));
-}
-
-} // namespace Internal
-} // namespace MesonProjectManager
diff --git a/src/plugins/mesonprojectmanager/tooltreeitem.h b/src/plugins/mesonprojectmanager/tooltreeitem.h
deleted file mode 100644
index 8f7b22abaf6..00000000000
--- a/src/plugins/mesonprojectmanager/tooltreeitem.h
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright (C) 2020 Alexis Jeandet.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#pragma once
-
-#include "mesontools.h"
-
-#include <utils/fileutils.h>
-#include <utils/id.h>
-#include <utils/treemodel.h>
-
-#include <QCoreApplication>
-#include <QString>
-
-#include <optional>
-
-namespace MesonProjectManager {
-namespace Internal {
-
-class ToolTreeItem final : public Utils::TreeItem
-{
-public:
-    ToolTreeItem(const QString &name);
-    ToolTreeItem(const MesonTools::Tool_t &tool);
-    ToolTreeItem(const ToolTreeItem &other);
-
-    QVariant data(int column, int role) const override;
-    inline bool isAutoDetected() const noexcept { return m_autoDetected; }
-    inline QString name() const noexcept { return m_name; }
-    inline Utils::FilePath executable() const noexcept { return m_executable; }
-    inline Utils::Id id() const noexcept { return m_id; }
-    inline bool hasUnsavedChanges() const noexcept { return m_unsavedChanges; }
-    inline void setSaved() { m_unsavedChanges = false; }
-    void update(const QString &name, const Utils::FilePath &exe);
-
-private:
-    void self_check();
-    void update_tooltip(const Version &version);
-    void update_tooltip();
-    QString m_name;
-    QString m_tooltip;
-    Utils::FilePath m_executable;
-    bool m_autoDetected;
-    bool m_pathExists;
-    bool m_pathIsFile;
-    bool m_pathIsExecutable;
-    Utils::Id m_id;
-
-    bool m_unsavedChanges = false;
-};
-
-} // namespace Internal
-} // namespace MesonProjectManager