diff --git a/gui/test/projectfile/testprojectfile.cpp b/gui/test/projectfile/testprojectfile.cpp
index d6a6ea12f..aaf708902 100644
--- a/gui/test/projectfile/testprojectfile.cpp
+++ b/gui/test/projectfile/testprojectfile.cpp
@@ -27,6 +27,10 @@ const char Settings::SafeChecks::XmlClasses[] = "class-public";
 const char Settings::SafeChecks::XmlExternalFunctions[] = "external-functions";
 const char Settings::SafeChecks::XmlInternalFunctions[] = "internal-functions";
 const char Settings::SafeChecks::XmlExternalVariables[] = "external-variables";
+Settings::Settings() : maxCtuDepth(10), maxTemplateRecursion(100) {}
+cppcheck::Platform::Platform() {}
+Library::Library() {}
+ImportProject::ImportProject() {}
 
 void TestProjectFile::loadInexisting()
 {