diff --git a/src/plugins/clangtools/diagnosticmark.cpp b/src/plugins/clangtools/diagnosticmark.cpp
index 5ea0895b947..9eba17965f4 100644
--- a/src/plugins/clangtools/diagnosticmark.cpp
+++ b/src/plugins/clangtools/diagnosticmark.cpp
@@ -29,43 +29,15 @@ DiagnosticMark::DiagnosticMark(const Diagnostic &diagnostic, TextDocument *docum
     : TextMark(document, diagnostic.location.line, clangToolsCategory())
     , m_diagnostic(diagnostic)
 {
-    setSettingsPage(Constants::SETTINGS_PAGE_ID);
-
-    const bool isError = diagnostic.type == "error" || diagnostic.type == "fatal";
-    setColor(isError ? Theme::CodeModel_Error_TextMarkColor : Theme::CodeModel_Warning_TextMarkColor);
-    setPriority(isError ? TextEditor::TextMark::HighPriority : TextEditor::TextMark::NormalPriority);
-    QIcon markIcon = diagnostic.icon();
-    setIcon(markIcon.isNull() ? Icons::CODEMODEL_WARNING.icon() : markIcon);
-    setToolTip(createDiagnosticToolTipString(diagnostic, std::nullopt, true));
-    setLineAnnotation(diagnostic.description);
-    setActionsProvider([diagnostic] {
-        // Copy to clipboard action
-        QList<QAction *> actions;
-        QAction *action = new QAction();
-        action->setIcon(Icon::fromTheme("edit-copy"));
-        action->setToolTip(Tr::tr("Copy to Clipboard"));
-        QObject::connect(action, &QAction::triggered, [diagnostic] {
-            const QString text = createFullLocationString(diagnostic.location)
-                                 + ": "
-                                 + diagnostic.description;
-            setClipboardAndSelection(text);
-        });
-        actions << action;
-
-        // Disable diagnostic action
-        action = new QAction();
-        action->setIcon(Icons::BROKEN.icon());
-        action->setToolTip(Tr::tr("Disable Diagnostic"));
-        QObject::connect(action, &QAction::triggered, [diagnostic] { disableChecks({diagnostic}); });
-        actions << action;
-        return actions;
-    });
+    initialize();
 }
 
 DiagnosticMark::DiagnosticMark(const Diagnostic &diagnostic)
     : TextMark(diagnostic.location.filePath, diagnostic.location.line, clangToolsCategory())
     , m_diagnostic(diagnostic)
-{}
+{
+    initialize();
+}
 
 void DiagnosticMark::disable()
 {
@@ -89,6 +61,41 @@ Diagnostic DiagnosticMark::diagnostic() const
     return m_diagnostic;
 }
 
+void DiagnosticMark::initialize()
+{
+    setSettingsPage(Constants::SETTINGS_PAGE_ID);
+
+    const bool isError = m_diagnostic.type == "error" || m_diagnostic.type == "fatal";
+    setColor(isError ? Theme::CodeModel_Error_TextMarkColor : Theme::CodeModel_Warning_TextMarkColor);
+    setPriority(isError ? TextEditor::TextMark::HighPriority : TextEditor::TextMark::NormalPriority);
+    QIcon markIcon = m_diagnostic.icon();
+    setIcon(markIcon.isNull() ? Icons::CODEMODEL_WARNING.icon() : markIcon);
+    setToolTip(createDiagnosticToolTipString(m_diagnostic, std::nullopt, true));
+    setLineAnnotation(m_diagnostic.description);
+    setActionsProvider([diagnostic = m_diagnostic] {
+        // Copy to clipboard action
+        QList<QAction *> actions;
+        QAction *action = new QAction();
+        action->setIcon(Icon::fromTheme("edit-copy"));
+        action->setToolTip(Tr::tr("Copy to Clipboard"));
+        QObject::connect(action, &QAction::triggered, [diagnostic] {
+            const QString text = createFullLocationString(diagnostic.location)
+            + ": "
+                + diagnostic.description;
+            setClipboardAndSelection(text);
+        });
+        actions << action;
+
+        // Disable diagnostic action
+        action = new QAction();
+        action->setIcon(Icons::BROKEN.icon());
+        action->setToolTip(Tr::tr("Disable Diagnostic"));
+        QObject::connect(action, &QAction::triggered, [diagnostic] { disableChecks({diagnostic}); });
+        actions << action;
+        return actions;
+    });
+}
+
 } // namespace Internal
 } // namespace ClangTools
 
diff --git a/src/plugins/clangtools/diagnosticmark.h b/src/plugins/clangtools/diagnosticmark.h
index 6d566739d42..7d2999e66ec 100644
--- a/src/plugins/clangtools/diagnosticmark.h
+++ b/src/plugins/clangtools/diagnosticmark.h
@@ -25,6 +25,7 @@ public:
     std::optional<CppEditor::ClangToolType> toolType;
 
 private:
+    void initialize();
     const Diagnostic m_diagnostic;
     bool m_enabled = true;
 };