diff --git a/gui/checkthread.cpp b/gui/checkthread.cpp
index d8ecca8b1c3..06821c0b136 100644
--- a/gui/checkthread.cpp
+++ b/gui/checkthread.cpp
@@ -36,6 +36,7 @@
 #include <list>
 #include <set>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include <QByteArray>
@@ -106,15 +107,13 @@ int CheckThread::executeCommand(std::string exe, std::vector<std::string> args,
 
 
 CheckThread::CheckThread(ThreadResult &result) :
-    mResult(result),
-    mCppcheck(result, true, executeCommand)
+    mResult(result)
 {}
 
-void CheckThread::check(const Settings &settings)
+void CheckThread::setSettings(const Settings &settings)
 {
     mFiles.clear();
-    mCppcheck.settings() = settings;
-    start();
+    mSettings = settings; // this is a copy
 }
 
 void CheckThread::analyseWholeProgram(const QStringList &files, const std::string& ctuInfo)
@@ -130,6 +129,9 @@ void CheckThread::run()
 {
     mState = Running;
 
+    CppCheck cppcheck(mResult, true, executeCommand);
+    cppcheck.settings() = std::move(mSettings);
+
     if (!mFiles.isEmpty() || mAnalyseWholeProgram) {
         mAnalyseWholeProgram = false;
         std::string ctuInfo;
@@ -139,7 +141,7 @@ void CheckThread::run()
         std::transform(mFiles.cbegin(), mFiles.cend(), std::back_inserter(files2), [&](const QString& file) {
             return FileWithDetails{file.toStdString(), 0};
         });
-        mCppcheck.analyseWholeProgram(mCppcheck.settings().buildDir, files2, {}, ctuInfo);
+        cppcheck.analyseWholeProgram(cppcheck.settings().buildDir, files2, {}, ctuInfo);
         mFiles.clear();
         emit done();
         return;
@@ -148,8 +150,8 @@ void CheckThread::run()
     QString file = mResult.getNextFile();
     while (!file.isEmpty() && mState == Running) {
         qDebug() << "Checking file" << file;
-        mCppcheck.check(FileWithDetails(file.toStdString()));
-        runAddonsAndTools(nullptr, file);
+        cppcheck.check(FileWithDetails(file.toStdString()));
+        runAddonsAndTools(cppcheck.settings(), nullptr, file);
         emit fileChecked(file);
 
         if (mState == Running)
@@ -161,8 +163,8 @@ void CheckThread::run()
     while (fileSettings && mState == Running) {
         file = QString::fromStdString(fileSettings->filename());
         qDebug() << "Checking file" << file;
-        mCppcheck.check(*fileSettings);
-        runAddonsAndTools(fileSettings, QString::fromStdString(fileSettings->filename()));
+        cppcheck.check(*fileSettings);
+        runAddonsAndTools(cppcheck.settings(), fileSettings, QString::fromStdString(fileSettings->filename()));
         emit fileChecked(file);
 
         if (mState == Running)
@@ -177,7 +179,7 @@ void CheckThread::run()
     emit done();
 }
 
-void CheckThread::runAddonsAndTools(const FileSettings *fileSettings, const QString &fileName)
+void CheckThread::runAddonsAndTools(const Settings& settings, const FileSettings *fileSettings, const QString &fileName)
 {
     for (const QString& addon : mAddonsAndTools) {
         if (addon == CLANG_ANALYZER || addon == CLANG_TIDY) {
@@ -229,7 +231,7 @@ void CheckThread::runAddonsAndTools(const FileSettings *fileSettings, const QStr
                 args << ("-std=" + QString::fromStdString(fileSettings->standard));
             else {
                 // TODO: pass C or C++ standard based on file type
-                const std::string std = mCppcheck.settings().standards.getCPP();
+                const std::string std = settings.standards.getCPP();
                 if (!std.empty()) {
                     args << ("-std=" + QString::fromStdString(std));
                 }
@@ -237,7 +239,7 @@ void CheckThread::runAddonsAndTools(const FileSettings *fileSettings, const QStr
 
             QString analyzerInfoFile;
 
-            const std::string &buildDir = mCppcheck.settings().buildDir;
+            const std::string &buildDir = settings.buildDir;
             if (!buildDir.empty()) {
                 analyzerInfoFile = QString::fromStdString(AnalyzerInformation::getAnalyzerInfoFile(buildDir, fileSettings->filename(), fileSettings->cfg));
 
diff --git a/gui/checkthread.h b/gui/checkthread.h
index 2b2c0a5a4d0..9dcf3cc98b5 100644
--- a/gui/checkthread.h
+++ b/gui/checkthread.h
@@ -20,7 +20,7 @@
 #ifndef CHECKTHREAD_H
 #define CHECKTHREAD_H
 
-#include "cppcheck.h"
+#include "settings.h"
 #include "suppressions.h"
 
 #include <atomic>
@@ -34,7 +34,6 @@
 #include <QStringList>
 #include <QThread>
 
-class Settings;
 class ThreadResult;
 struct FileSettings;
 
@@ -55,7 +54,7 @@ class CheckThread : public QThread {
      *
      * @param settings settings for cppcheck
      */
-    void check(const Settings &settings);
+    void setSettings(const Settings &settings);
 
     /**
      * @brief Run whole program analysis
@@ -130,13 +129,11 @@ class CheckThread : public QThread {
     std::atomic<State> mState{Ready};
 
     ThreadResult &mResult;
-    /**
-     * @brief Cppcheck itself
-     */
-    CppCheck mCppcheck;
+
+    Settings mSettings;
 
 private:
-    void runAddonsAndTools(const FileSettings *fileSettings, const QString &fileName);
+    void runAddonsAndTools(const Settings& settings, const FileSettings *fileSettings, const QString &fileName);
 
     void parseClangErrors(const QString &tool, const QString &file0, QString err);
 
diff --git a/gui/threadhandler.cpp b/gui/threadhandler.cpp
index 1ed363eda96..8fb78011f7c 100644
--- a/gui/threadhandler.cpp
+++ b/gui/threadhandler.cpp
@@ -109,7 +109,8 @@ void ThreadHandler::check(const Settings &settings)
         mThreads[i]->setAddonsAndTools(addonsAndTools);
         mThreads[i]->setSuppressions(mSuppressions);
         mThreads[i]->setClangIncludePaths(mClangIncludePaths);
-        mThreads[i]->check(settings);
+        mThreads[i]->setSettings(settings);
+        mThreads[i]->start();
     }
 
     // Date and time when checking starts..
diff --git a/gui/threadhandler.h b/gui/threadhandler.h
index addd270391a..22b3350374a 100644
--- a/gui/threadhandler.h
+++ b/gui/threadhandler.h
@@ -24,6 +24,7 @@
 #include "threadresult.h"
 
 #include <set>
+#include <string>
 
 #include <QDateTime>
 #include <QElapsedTimer>