diff --git a/src/plugins/qmakeprojectmanager/qmakeprojectmanager.cpp b/src/plugins/qmakeprojectmanager/qmakeprojectmanager.cpp
index b56ac0cf7a17b38d3a24e1e4c126508d688f28f8..d83879e6da9a92cfde9399775d6d07dc76317647 100644
--- a/src/plugins/qmakeprojectmanager/qmakeprojectmanager.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakeprojectmanager.cpp
@@ -123,17 +123,17 @@ void QmakeManager::setContextFile(ProjectExplorer::FileNode *file)
 void QmakeManager::addLibrary()
 {
     if (auto editor = qobject_cast<BaseTextEditor *>(Core::EditorManager::currentEditor()))
-        addLibrary(editor->document()->filePath().toString(), editor);
+        addLibraryImpl(editor->document()->filePath().toString(), editor);
 }
 
 void QmakeManager::addLibraryContextMenu()
 {
     Node *node = ProjectTree::currentNode();
     if (dynamic_cast<QmakeProFileNode *>(node))
-        addLibrary(node->filePath().toString());
+        addLibraryImpl(node->filePath().toString(), nullptr);
 }
 
-void QmakeManager::addLibrary(const QString &fileName, BaseTextEditor *editor)
+void QmakeManager::addLibraryImpl(const QString &fileName, BaseTextEditor *editor)
 {
     Internal::AddLibraryWizard wizard(fileName, Core::ICore::dialogParent());
     if (wizard.exec() != QDialog::Accepted)
@@ -161,15 +161,15 @@ void QmakeManager::addLibrary(const QString &fileName, BaseTextEditor *editor)
 
 void QmakeManager::runQMake()
 {
-    runQMake(SessionManager::startupProject(), 0);
+    runQMakeImpl(SessionManager::startupProject(), nullptr);
 }
 
 void QmakeManager::runQMakeContextMenu()
 {
-    runQMake(m_contextProject, m_contextNode);
+    runQMakeImpl(m_contextProject, m_contextNode);
 }
 
-void QmakeManager::runQMake(ProjectExplorer::Project *p, ProjectExplorer::Node *node)
+void QmakeManager::runQMakeImpl(ProjectExplorer::Project *p, ProjectExplorer::Node *node)
 {
     if (!ProjectExplorerPlugin::saveModifiedFiles())
         return;
diff --git a/src/plugins/qmakeprojectmanager/qmakeprojectmanager.h b/src/plugins/qmakeprojectmanager/qmakeprojectmanager.h
index 52c31afafc4a812ca23c41cb716aaceea396ea02..ece682f76d574ccbe0659f1755e926f96f849e6a 100644
--- a/src/plugins/qmakeprojectmanager/qmakeprojectmanager.h
+++ b/src/plugins/qmakeprojectmanager/qmakeprojectmanager.h
@@ -23,8 +23,7 @@
 **
 ****************************************************************************/
 
-#ifndef QMAKEPROJECTMANAGER_H
-#define QMAKEPROJECTMANAGER_H
+#pragma once
 
 #include "qmakeprojectmanager_global.h"
 
@@ -68,7 +67,6 @@ public:
 
     enum Action { BUILD, REBUILD, CLEAN };
 
-public slots:
     void addLibrary();
     void addLibraryContextMenu();
     void runQMake();
@@ -86,8 +84,8 @@ private:
                                  ProjectExplorer::Project *contextProject,
                                  ProjectExplorer::Node *contextNode,
                                  ProjectExplorer::FileNode *contextFile);
-    void addLibrary(const QString &fileName, TextEditor::BaseTextEditor *editor = 0);
-    void runQMake(ProjectExplorer::Project *p, ProjectExplorer::Node *node);
+    void addLibraryImpl(const QString &fileName, TextEditor::BaseTextEditor *editor);
+    void runQMakeImpl(ProjectExplorer::Project *p, ProjectExplorer::Node *node);
 
     ProjectExplorer::Node *m_contextNode = nullptr;
     ProjectExplorer::Project *m_contextProject = nullptr;
@@ -95,5 +93,3 @@ private:
 };
 
 } // namespace QmakeProjectManager
-
-#endif // QMAKEPROJECTMANAGER_H
diff --git a/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp b/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp
index c567cfbc810f364eafdca57a81ea434362357e3e..1b3730992da7e5ec74b52dad186dec6c28f2b99d 100644
--- a/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp
@@ -135,14 +135,15 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
     command->setAttribute(Command::CA_UpdateText);
     command->setDescription(m_buildSubProjectContextMenu->text());
     msubproject->addAction(command, ProjectExplorer::Constants::G_PROJECT_BUILD);
-    connect(m_buildSubProjectContextMenu, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(buildSubDirContextMenu()));
+    connect(m_buildSubProjectContextMenu, &QAction::triggered, m_qmakeProjectManager, &QmakeManager::buildSubDirContextMenu);
 
     m_runQMakeActionContextMenu = new QAction(tr("Run qmake"), this);
     command = ActionManager::registerAction(m_runQMakeActionContextMenu, Constants::RUNQMAKECONTEXTMENU, projectContext);
     command->setAttribute(Command::CA_Hide);
     mproject->addAction(command, ProjectExplorer::Constants::G_PROJECT_BUILD);
     msubproject->addAction(command, ProjectExplorer::Constants::G_PROJECT_BUILD);
-    connect(m_runQMakeActionContextMenu, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(runQMakeContextMenu()));
+    connect(m_runQMakeActionContextMenu, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::runQMakeContextMenu);
 
     command = msubproject->addSeparator(projectContext, ProjectExplorer::Constants::G_PROJECT_BUILD,
                                         &m_subProjectRebuildSeparator);
@@ -153,20 +154,23 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
                 m_rebuildSubProjectContextMenu, Constants::REBUILDSUBDIRCONTEXTMENU, projectContext);
     command->setAttribute(Command::CA_Hide);
     msubproject->addAction(command, ProjectExplorer::Constants::G_PROJECT_BUILD);
-    connect(m_rebuildSubProjectContextMenu, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(rebuildSubDirContextMenu()));
+    connect(m_rebuildSubProjectContextMenu, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::rebuildSubDirContextMenu);
 
     m_cleanSubProjectContextMenu = new QAction(tr("Clean"), this);
     command = ActionManager::registerAction(
                 m_cleanSubProjectContextMenu, Constants::CLEANSUBDIRCONTEXTMENU, projectContext);
     command->setAttribute(Command::CA_Hide);
     msubproject->addAction(command, ProjectExplorer::Constants::G_PROJECT_BUILD);
-    connect(m_cleanSubProjectContextMenu, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(cleanSubDirContextMenu()));
+    connect(m_cleanSubProjectContextMenu, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::cleanSubDirContextMenu);
 
     m_buildFileContextMenu = new QAction(tr("Build"), this);
     command = ActionManager::registerAction(m_buildFileContextMenu, Constants::BUILDFILECONTEXTMENU, projectContext);
     command->setAttribute(Command::CA_Hide);
     mfile->addAction(command, ProjectExplorer::Constants::G_FILE_OTHER);
-    connect(m_buildFileContextMenu, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(buildFileContextMenu()));
+    connect(m_buildFileContextMenu, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::buildFileContextMenu);
 
     m_buildSubProjectAction = new Utils::ParameterAction(tr("Build Subproject"), tr("Build Subproject \"%1\""),
                                                          Utils::ParameterAction::AlwaysEnabled, this);
@@ -175,13 +179,14 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
     command->setAttribute(Command::CA_UpdateText);
     command->setDescription(m_buildSubProjectAction->text());
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_BUILD);
-    connect(m_buildSubProjectAction, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(buildSubDirContextMenu()));
+    connect(m_buildSubProjectAction, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::buildSubDirContextMenu);
 
     m_runQMakeAction = new QAction(tr("Run qmake"), this);
     const Context globalcontext(Core::Constants::C_GLOBAL);
     command = ActionManager::registerAction(m_runQMakeAction, Constants::RUNQMAKE, globalcontext);
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_BUILD);
-    connect(m_runQMakeAction, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(runQMake()));
+    connect(m_runQMakeAction, &QAction::triggered, m_qmakeProjectManager, &QmakeManager::runQMake);
 
     m_rebuildSubProjectAction = new Utils::ParameterAction(tr("Rebuild Subproject"), tr("Rebuild Subproject \"%1\""),
                                                            Utils::ParameterAction::AlwaysEnabled, this);
@@ -190,7 +195,8 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
     command->setAttribute(Command::CA_UpdateText);
     command->setDescription(m_rebuildSubProjectAction->text());
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_REBUILD);
-    connect(m_rebuildSubProjectAction, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(rebuildSubDirContextMenu()));
+    connect(m_rebuildSubProjectAction, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::rebuildSubDirContextMenu);
 
     m_cleanSubProjectAction = new Utils::ParameterAction(tr("Clean Subproject"), tr("Clean Subproject \"%1\""),
                                                          Utils::ParameterAction::AlwaysEnabled, this);
@@ -199,7 +205,8 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
     command->setAttribute(Command::CA_UpdateText);
     command->setDescription(m_cleanSubProjectAction->text());
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_CLEAN);
-    connect(m_cleanSubProjectAction, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(cleanSubDirContextMenu()));
+    connect(m_cleanSubProjectAction, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::cleanSubDirContextMenu);
 
     m_buildFileAction = new Utils::ParameterAction(tr("Build File"), tr("Build File \"%1\""),
                                                    Utils::ParameterAction::AlwaysEnabled, this);
@@ -209,10 +216,10 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
     command->setDescription(m_buildFileAction->text());
     command->setDefaultKeySequence(QKeySequence(tr("Ctrl+Alt+B")));
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_BUILD);
-    connect(m_buildFileAction, SIGNAL(triggered()), m_qmakeProjectManager, SLOT(buildFile()));
+    connect(m_buildFileAction, &QAction::triggered, m_qmakeProjectManager, &QmakeManager::buildFile);
 
-    connect(BuildManager::instance(), SIGNAL(buildStateChanged(ProjectExplorer::Project*)),
-            this, SLOT(buildStateChanged(ProjectExplorer::Project*)));
+    connect(BuildManager::instance(), &BuildManager::buildStateChanged,
+            this, &QmakeProjectManagerPlugin::buildStateChanged);
     connect(SessionManager::instance(), &SessionManager::startupProjectChanged,
             this, &QmakeProjectManagerPlugin::projectChanged);
     connect(ProjectTree::instance(), &ProjectTree::currentProjectChanged,
@@ -231,15 +238,14 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
     m_addLibraryAction = new QAction(tr("Add Library..."), this);
     command = ActionManager::registerAction(m_addLibraryAction,
         Constants::ADDLIBRARY, proFileEditorContext);
-    connect(m_addLibraryAction, SIGNAL(triggered()),
-            m_qmakeProjectManager, SLOT(addLibrary()));
+    connect(m_addLibraryAction, &QAction::triggered, m_qmakeProjectManager, &QmakeManager::addLibrary);
     contextMenu->addAction(command);
 
     m_addLibraryActionContextMenu = new QAction(tr("Add Library..."), this);
     command = ActionManager::registerAction(m_addLibraryActionContextMenu,
         Constants::ADDLIBRARY, projecTreeContext);
-    connect(m_addLibraryActionContextMenu, SIGNAL(triggered()),
-            m_qmakeProjectManager, SLOT(addLibraryContextMenu()));
+    connect(m_addLibraryActionContextMenu, &QAction::triggered,
+            m_qmakeProjectManager, &QmakeManager::addLibraryContextMenu);
     mproject->addAction(command, ProjectExplorer::Constants::G_PROJECT_FILES);
     msubproject->addAction(command, ProjectExplorer::Constants::G_PROJECT_FILES);
 
@@ -260,8 +266,8 @@ void QmakeProjectManagerPlugin::extensionsInitialized()
 void QmakeProjectManagerPlugin::projectChanged()
 {
     if (m_previousStartupProject)
-        disconnect(m_previousStartupProject, SIGNAL(activeTargetChanged(ProjectExplorer::Target*)),
-                   this, SLOT(activeTargetChanged()));
+        disconnect(m_previousStartupProject, &Project::activeTargetChanged,
+                   this, &QmakeProjectManagerPlugin::activeTargetChanged);
 
     if (ProjectTree::currentProject())
         m_previousStartupProject = qobject_cast<QmakeProject *>(ProjectTree::currentProject());
@@ -269,8 +275,8 @@ void QmakeProjectManagerPlugin::projectChanged()
         m_previousStartupProject = qobject_cast<QmakeProject *>(SessionManager::startupProject());
 
     if (m_previousStartupProject)
-        connect(m_previousStartupProject, SIGNAL(activeTargetChanged(ProjectExplorer::Target*)),
-                           this, SLOT(activeTargetChanged()));
+        connect(m_previousStartupProject, &Project::activeTargetChanged,
+                           this, &QmakeProjectManagerPlugin::activeTargetChanged);
 
     activeTargetChanged();
 }
@@ -278,14 +284,14 @@ void QmakeProjectManagerPlugin::projectChanged()
 void QmakeProjectManagerPlugin::activeTargetChanged()
 {
     if (m_previousTarget)
-        disconnect(m_previousTarget, SIGNAL(activeBuildConfigurationChanged(ProjectExplorer::BuildConfiguration*)),
-                   this, SLOT(updateRunQMakeAction()));
+        disconnect(m_previousTarget, &Target::activeBuildConfigurationChanged,
+                   this, &QmakeProjectManagerPlugin::updateRunQMakeAction);
 
     m_previousTarget = m_previousStartupProject ? m_previousStartupProject->activeTarget() : 0;
 
     if (m_previousTarget)
-        connect(m_previousTarget, SIGNAL(activeBuildConfigurationChanged(ProjectExplorer::BuildConfiguration*)),
-                this, SLOT(updateRunQMakeAction()));
+        connect(m_previousTarget, &Target::activeBuildConfigurationChanged,
+                this, &QmakeProjectManagerPlugin::updateRunQMakeAction);
 
     updateRunQMakeAction();
 }
diff --git a/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.h b/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.h
index 3ed014d97414d8cedcf5d5c64a80c9838fcab029..2029fe2b9e7ccf98cf65f8c1a91128b319e1d586 100644
--- a/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.h
+++ b/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.h
@@ -58,7 +58,13 @@ public:
     bool initialize(const QStringList &arguments, QString *errorMessage);
     void extensionsInitialized();
 
+#ifdef WITH_TESTS
 private slots:
+    void testQmakeOutputParsers_data();
+    void testQmakeOutputParsers();
+#endif
+
+private:
     void projectChanged();
     void activeTargetChanged();
     void updateRunQMakeAction();
@@ -66,12 +72,6 @@ private slots:
     void buildStateChanged(ProjectExplorer::Project *pro);
     void updateBuildFileAction();
 
-#ifdef WITH_TESTS
-    void testQmakeOutputParsers_data();
-    void testQmakeOutputParsers();
-#endif
-
-private:
     QmakeManager *m_qmakeProjectManager = nullptr;
     QmakeProject *m_previousStartupProject = nullptr;
     ProjectExplorer::Target *m_previousTarget = nullptr;