diff --git a/Framework/include/QualityControl/Quality.h b/Framework/include/QualityControl/Quality.h
index b05871aee5..cac8c85632 100644
--- a/Framework/include/QualityControl/Quality.h
+++ b/Framework/include/QualityControl/Quality.h
@@ -35,7 +35,7 @@ class Quality
 {
  public:
   /// Default constructor
-  Quality(unsigned int level = Quality::NullLevel, std::string name = "");
+  explicit Quality(unsigned int level = Quality::NullLevel, std::string name = "");
 
   /// Destructor
   virtual ~Quality() = default;
diff --git a/Framework/test/testAggregatorInterface.cxx b/Framework/test/testAggregatorInterface.cxx
index f2cd1924dc..e71cc57f57 100644
--- a/Framework/test/testAggregatorInterface.cxx
+++ b/Framework/test/testAggregatorInterface.cxx
@@ -78,10 +78,10 @@ TEST_CASE("test_invoke_all_methods")
   test::SimpleTestAggregator testAggregator;
 
   // prepare data
-  std::shared_ptr<QualityObject> qo_null = make_shared<QualityObject>(0, "testCheckNull", "TST");
-  std::shared_ptr<QualityObject> qo_good = make_shared<QualityObject>(1, "testCheckGood", "TST");
-  std::shared_ptr<QualityObject> qo_medium = make_shared<QualityObject>(2, "testCheckMedium", "TST");
-  std::shared_ptr<QualityObject> qo_bad = make_shared<QualityObject>(3, "testCheckBad", "TST");
+  std::shared_ptr<QualityObject> qo_null = make_shared<QualityObject>(Quality::Null, "testCheckNull", "TST");
+  std::shared_ptr<QualityObject> qo_good = make_shared<QualityObject>(Quality::Good, "testCheckGood", "TST");
+  std::shared_ptr<QualityObject> qo_medium = make_shared<QualityObject>(Quality::Medium, "testCheckMedium", "TST");
+  std::shared_ptr<QualityObject> qo_bad = make_shared<QualityObject>(Quality::Bad, "testCheckBad", "TST");
   QualityObjectsMapType input;
 
   std::map<std::string, Quality> result1 = testAggregator.aggregate(input);
diff --git a/Framework/test/testBookkeepingQualitySink.cxx b/Framework/test/testBookkeepingQualitySink.cxx
index 319a3e366f..2862d6627d 100644
--- a/Framework/test/testBookkeepingQualitySink.cxx
+++ b/Framework/test/testBookkeepingQualitySink.cxx
@@ -15,13 +15,11 @@
 ///
 
 #include <DataFormatsQualityControl/QualityControlFlag.h>
-#include <DataSampling/DataSampling.h>
 #include "QualityControl/BookkeepingQualitySink.h"
 #include "QualityControl/InfrastructureGenerator.h"
 
 using namespace o2;
 using namespace o2::framework;
-using namespace o2::utilities;
 
 void customize(std::vector<CompletionPolicy>& policies)
 {
@@ -30,12 +28,8 @@ void customize(std::vector<CompletionPolicy>& policies)
 
 #include <Framework/runDataProcessing.h>
 #include <Framework/ControlService.h>
-#include <Configuration/ConfigurationFactory.h>
-#include <Configuration/ConfigurationInterface.h>
-#include <QualityControl/BookkeepingQualitySink.h>
-#include <QualityControl/QualityObject.h>
-
-using namespace o2::configuration;
+#include "QualityControl/QualityObject.h"
+#include "QualityControl/Quality.h"
 
 void compareFatal(const quality_control::QualityControlFlag& got, const quality_control::QualityControlFlag& expected)
 {
@@ -57,7 +51,7 @@ WorkflowSpec defineDataProcessing(ConfigContext const&)
     Inputs{},
     Outputs{ { { "tst-qo" }, "TST", "DATA" } },
     AlgorithmSpec{ [](ProcessingContext& ctx) {
-      auto obj = std::make_unique<core::QualityObject>(0, "testCheckNull", "TST");
+      auto obj = std::make_unique<core::QualityObject>(core::Quality::Null, "testCheckNull", "TST");
       obj->getActivity().mValidity = core::ValidityInterval{ 10, 500 };
       obj->addFlag(FlagTypeFactory::Good(), "I am comment");
       ctx.outputs().snapshot(Output{ "TST", "DATA", 0 }, *obj);
diff --git a/Modules/TRD/src/PulsePositionCheck.cxx b/Modules/TRD/src/PulsePositionCheck.cxx
index 7fefd4d7f7..4787d1276d 100644
--- a/Modules/TRD/src/PulsePositionCheck.cxx
+++ b/Modules/TRD/src/PulsePositionCheck.cxx
@@ -229,9 +229,6 @@ void PulsePositionCheck::beautify(std::shared_ptr<MonitorObject> mo, Quality che
     } else if (checkResult == Quality::Null) {
       ILOG(Debug, Devel) << "Quality::Null, setting to Blue" << ENDM;
       h->SetFillColor(kBlue);
-    } else if (checkResult == Quality::NullLevel) {
-      ILOG(Debug, Devel) << "Quality::Null, setting to Pink" << ENDM;
-      h->SetFillColor(kPink);
     }
     h->SetLineColor(kBlack);
     h->Draw();