diff --git a/src/plugins/cpptools/cpptoolstestcase.cpp b/src/plugins/cpptools/cpptoolstestcase.cpp
index 5aebd874284..fa6bed8b511 100644
--- a/src/plugins/cpptools/cpptoolstestcase.cpp
+++ b/src/plugins/cpptools/cpptoolstestcase.cpp
@@ -363,16 +363,18 @@ VerifyCleanCppModelManager::~VerifyCleanCppModelManager() {
 
 #define RETURN_FALSE_IF_NOT(check) if (!(check)) return false;
 
-bool VerifyCleanCppModelManager::isClean()
+bool VerifyCleanCppModelManager::isClean(bool testOnlyForCleanedProjects)
 {
     CppModelManager *mm = CppModelManager::instance();
     RETURN_FALSE_IF_NOT(mm->projectInfos().isEmpty());
     RETURN_FALSE_IF_NOT(mm->headerPaths().isEmpty());
     RETURN_FALSE_IF_NOT(mm->definedMacros().isEmpty());
     RETURN_FALSE_IF_NOT(mm->projectFiles().isEmpty());
-    RETURN_FALSE_IF_NOT(mm->snapshot().isEmpty());
-    RETURN_FALSE_IF_NOT(mm->workingCopy().size() == 1);
-    RETURN_FALSE_IF_NOT(mm->workingCopy().contains(mm->configurationFileName()));
+    if (!testOnlyForCleanedProjects) {
+        RETURN_FALSE_IF_NOT(mm->snapshot().isEmpty());
+        RETURN_FALSE_IF_NOT(mm->workingCopy().size() == 1);
+        RETURN_FALSE_IF_NOT(mm->workingCopy().contains(mm->configurationFileName()));
+    }
     return true;
 }
 
diff --git a/src/plugins/cpptools/cpptoolstestcase.h b/src/plugins/cpptools/cpptoolstestcase.h
index f7a7343edeb..5a95952365d 100644
--- a/src/plugins/cpptools/cpptoolstestcase.h
+++ b/src/plugins/cpptools/cpptoolstestcase.h
@@ -161,7 +161,7 @@ class CPPTOOLS_EXPORT VerifyCleanCppModelManager
 public:
     VerifyCleanCppModelManager();
     ~VerifyCleanCppModelManager();
-    static bool isClean();
+    static bool isClean(bool testCleanedProjects = true);
 };
 
 class FileWriterAndRemover
diff --git a/src/plugins/cpptools/modelmanagertesthelper.cpp b/src/plugins/cpptools/modelmanagertesthelper.cpp
index 84050476805..462d628e52d 100644
--- a/src/plugins/cpptools/modelmanagertesthelper.cpp
+++ b/src/plugins/cpptools/modelmanagertesthelper.cpp
@@ -54,8 +54,10 @@ TestProject::~TestProject()
 {
 }
 
-ModelManagerTestHelper::ModelManagerTestHelper(QObject *parent) :
-    QObject(parent)
+ModelManagerTestHelper::ModelManagerTestHelper(QObject *parent,
+                                               bool testOnlyForCleanedProjects)
+    : QObject(parent)
+    , m_testOnlyForCleanedProjects(testOnlyForCleanedProjects)
 
 {
     CppModelManager *mm = CppModelManager::instance();
@@ -69,13 +71,13 @@ ModelManagerTestHelper::ModelManagerTestHelper(QObject *parent) :
             this, &ModelManagerTestHelper::gcFinished);
 
     cleanup();
-    QVERIFY(Tests::VerifyCleanCppModelManager::isClean());
+    QVERIFY(Tests::VerifyCleanCppModelManager::isClean(m_testOnlyForCleanedProjects));
 }
 
 ModelManagerTestHelper::~ModelManagerTestHelper()
 {
     cleanup();
-    QVERIFY(Tests::VerifyCleanCppModelManager::isClean());
+    QVERIFY(Tests::VerifyCleanCppModelManager::isClean(m_testOnlyForCleanedProjects));
 }
 
 void ModelManagerTestHelper::cleanup()
diff --git a/src/plugins/cpptools/modelmanagertesthelper.h b/src/plugins/cpptools/modelmanagertesthelper.h
index a184a0777e0..d914cd75bc5 100644
--- a/src/plugins/cpptools/modelmanagertesthelper.h
+++ b/src/plugins/cpptools/modelmanagertesthelper.h
@@ -75,7 +75,8 @@ class CPPTOOLS_EXPORT ModelManagerTestHelper: public QObject
 public:
     typedef ProjectExplorer::Project Project;
 
-    explicit ModelManagerTestHelper(QObject *parent = 0);
+    explicit ModelManagerTestHelper(QObject *parent = 0,
+                                    bool testOnlyForCleanedProjects = true);
     ~ModelManagerTestHelper();
 
     void cleanup();
@@ -99,6 +100,7 @@ public slots:
 private:
     bool m_gcFinished;
     bool m_refreshHappened;
+    bool m_testOnlyForCleanedProjects;
     QSet<QString> m_lastRefreshedSourceFiles;
 };