diff --git a/src/plugins/valgrind/callgrindengine.cpp b/src/plugins/valgrind/callgrindengine.cpp
index 1318945155a..92b13b4f77b 100644
--- a/src/plugins/valgrind/callgrindengine.cpp
+++ b/src/plugins/valgrind/callgrindengine.cpp
@@ -61,34 +61,32 @@ CallgrindToolRunner::~CallgrindToolRunner()
     cleanupTempFile();
 }
 
-QStringList CallgrindToolRunner::toolArguments() const
+void CallgrindToolRunner::addToolArguments(CommandLine &cmd) const
 {
-    QStringList arguments = {"--tool=callgrind"};
+    cmd << "--tool=callgrind";
 
     if (m_settings.enableCacheSim())
-        arguments << "--cache-sim=yes";
+        cmd << "--cache-sim=yes";
 
     if (m_settings.enableBranchSim())
-        arguments << "--branch-sim=yes";
+        cmd << "--branch-sim=yes";
 
     if (m_settings.collectBusEvents())
-        arguments << "--collect-bus=yes";
+        cmd << "--collect-bus=yes";
 
     if (m_settings.collectSystime())
-        arguments << "--collect-systime=yes";
+        cmd << "--collect-systime=yes";
 
     if (m_markAsPaused)
-        arguments << "--instr-atstart=no";
+        cmd << "--instr-atstart=no";
 
     // add extra arguments
     if (!m_argumentForToggleCollect.isEmpty())
-        arguments << m_argumentForToggleCollect;
+        cmd << m_argumentForToggleCollect;
 
-    arguments << "--callgrind-out-file=" + m_valgrindOutputFile.path();
+    cmd << "--callgrind-out-file=" + m_valgrindOutputFile.path();
 
-    arguments << ProcessArgs::splitArgs(m_settings.callgrindArguments(), HostOsInfo::hostOs());
-
-    return arguments;
+    cmd.addArgs(m_settings.callgrindArguments(), CommandLine::Raw);
 }
 
 QString CallgrindToolRunner::progressTitle() const
diff --git a/src/plugins/valgrind/callgrindengine.h b/src/plugins/valgrind/callgrindengine.h
index 4ec6a16d7fa..d5d26e113a5 100644
--- a/src/plugins/valgrind/callgrindengine.h
+++ b/src/plugins/valgrind/callgrindengine.h
@@ -48,7 +48,7 @@ public:
     Q_ENUM(Option)
 
 protected:
-    QStringList toolArguments() const override;
+    void addToolArguments(Utils::CommandLine &cmd) const override;
     QString progressTitle() const override;
 
 signals:
diff --git a/src/plugins/valgrind/memchecktool.cpp b/src/plugins/valgrind/memchecktool.cpp
index 38e06d46950..e2921603e98 100644
--- a/src/plugins/valgrind/memchecktool.cpp
+++ b/src/plugins/valgrind/memchecktool.cpp
@@ -111,7 +111,7 @@ signals:
 
 private:
     QString progressTitle() const override;
-    QStringList toolArguments() const override;
+    void addToolArguments(CommandLine &cmd) const override;
 
     void startDebugger(qint64 valgrindPid);
     void appendLog(const QByteArray &data);
@@ -181,15 +181,15 @@ void MemcheckToolRunner::stop()
     ValgrindToolRunner::stop();
 }
 
-QStringList MemcheckToolRunner::toolArguments() const
+void MemcheckToolRunner::addToolArguments(CommandLine &cmd) const
 {
-    QStringList arguments = {"--tool=memcheck", "--gen-suppressions=all"};
+    cmd << "--tool=memcheck" << "--gen-suppressions=all";
 
     if (m_settings.trackOrigins())
-        arguments << "--track-origins=yes";
+        cmd << "--track-origins=yes";
 
     if (m_settings.showReachable())
-        arguments << "--show-reachable=yes";
+        cmd << "--show-reachable=yes";
 
     QString leakCheckValue;
     switch (m_settings.leakCheckOnFinish()) {
@@ -204,19 +204,17 @@ QStringList MemcheckToolRunner::toolArguments() const
         leakCheckValue = "summary";
         break;
     }
-    arguments << "--leak-check=" + leakCheckValue;
+    cmd << "--leak-check=" + leakCheckValue;
 
     for (const FilePath &file : m_settings.suppressions())
-        arguments << QString("--suppressions=%1").arg(file.path());
+        cmd << QString("--suppressions=%1").arg(file.path());
 
-    arguments << QString("--num-callers=%1").arg(m_settings.numCallers());
+    cmd << QString("--num-callers=%1").arg(m_settings.numCallers());
 
     if (m_withGdb)
-        arguments << "--vgdb=yes" << "--vgdb-error=0";
+        cmd << "--vgdb=yes" << "--vgdb-error=0";
 
-    arguments << ProcessArgs::splitArgs(m_settings.memcheckArguments(), HostOsInfo::hostOs());
-
-    return arguments;
+    cmd.addArgs(m_settings.memcheckArguments(), CommandLine::Raw);
 }
 
 const FilePaths MemcheckToolRunner::suppressionFiles() const
diff --git a/src/plugins/valgrind/valgrindengine.cpp b/src/plugins/valgrind/valgrindengine.cpp
index 2d4ab6aadca..a228eb0e09a 100644
--- a/src/plugins/valgrind/valgrindengine.cpp
+++ b/src/plugins/valgrind/valgrindengine.cpp
@@ -74,9 +74,9 @@ void ValgrindToolRunner::start()
     m_progress.reportStarted();
 
     CommandLine valgrind{valgrindExecutable};
-    valgrind.addArgs(m_settings.valgrindArguments.value(), CommandLine::Raw);
+    valgrind.addArgs(m_settings.valgrindArguments(), CommandLine::Raw);
     valgrind.addArgs(genericToolArguments());
-    valgrind.addArgs(toolArguments());
+    addToolArguments(valgrind);
 
     m_runner.setValgrindCommand(valgrind);
     m_runner.setDebuggee(runControl()->runnable());
diff --git a/src/plugins/valgrind/valgrindengine.h b/src/plugins/valgrind/valgrindengine.h
index e5894b17838..d491c7a8476 100644
--- a/src/plugins/valgrind/valgrindengine.h
+++ b/src/plugins/valgrind/valgrindengine.h
@@ -6,7 +6,6 @@
 #include "valgrindsettings.h"
 
 #include <projectexplorer/runcontrol.h>
-#include <utils/environment.h>
 #include <valgrind/valgrindrunner.h>
 
 #include <QFutureInterface>
@@ -23,7 +22,7 @@ public:
 
 protected:
     virtual QString progressTitle() const = 0;
-    virtual QStringList toolArguments() const = 0;
+    virtual void addToolArguments(Utils::CommandLine &cmd) const = 0;
 
     ValgrindProjectSettings m_settings;
     QFutureInterface<void> m_progress;