diff --git a/DQM/TrackingMonitorSource/plugins/ShortenedTrackResolution.cc b/DQM/TrackingMonitorSource/plugins/ShortenedTrackResolution.cc
index 1b1d88d0ae1b6..cfdc15789c633 100644
--- a/DQM/TrackingMonitorSource/plugins/ShortenedTrackResolution.cc
+++ b/DQM/TrackingMonitorSource/plugins/ShortenedTrackResolution.cc
@@ -81,7 +81,7 @@ void ShortenedTrackResolution::analyze(edm::Event const &iEvent, edm::EventSetup
   }
 
   for (const auto &track : *tracks) {
-    reco::HitPattern hp = track.hitPattern();
+    const reco::HitPattern &hp = track.hitPattern();
     if (int(int(hp.numberOfValidHits()) - int(hp.numberOfAllHits(reco::HitPattern::TRACK_HITS))) != 0) {
       break;
     }
diff --git a/RecoTracker/FinalTrackSelectors/plugins/SingleLongTrackProducer.cc b/RecoTracker/FinalTrackSelectors/plugins/SingleLongTrackProducer.cc
index e351daf51a509..2645a1c067ef8 100644
--- a/RecoTracker/FinalTrackSelectors/plugins/SingleLongTrackProducer.cc
+++ b/RecoTracker/FinalTrackSelectors/plugins/SingleLongTrackProducer.cc
@@ -20,7 +20,7 @@ class SingleLongTrackProducer : public edm::stream::EDProducer<> {
   static void fillDescriptions(edm::ConfigurationDescriptions &descriptions);
 
 private:
-  virtual void produce(edm::Event &, const edm::EventSetup &) override;
+  void produce(edm::Event &, const edm::EventSetup &) override;
 
   const edm::EDGetTokenT<std::vector<reco::Track>> tracksToken;
   const edm::EDGetTokenT<std::vector<reco::Muon>> muonsToken;
@@ -71,7 +71,7 @@ void SingleLongTrackProducer::produce(edm::Event &iEvent, const edm::EventSetup
   double fitProb = 100;
 
   for (const auto &track : *tracks) {
-    reco::HitPattern hitpattern = track.hitPattern();
+    const reco::HitPattern &hitpattern = track.hitPattern();
     double dRmin = 10;
     double chiNdof = track.normalizedChi2();
     double dxy = std::abs(track.dxy(vtx.position()));
diff --git a/RecoTracker/FinalTrackSelectors/plugins/TrackerTrackHitFilter.cc b/RecoTracker/FinalTrackSelectors/plugins/TrackerTrackHitFilter.cc
index 23d26d00ea80f..c03ecb6c92ebb 100644
--- a/RecoTracker/FinalTrackSelectors/plugins/TrackerTrackHitFilter.cc
+++ b/RecoTracker/FinalTrackSelectors/plugins/TrackerTrackHitFilter.cc
@@ -644,7 +644,7 @@ namespace reco {
       TrajectorySeed seed(state, TrackCandidate::RecHitContainer(), pdir);
       TrackCandidate::RecHitContainer ownHits;
       ownHits.reserve(hitsEnd - hitsBegin);
-      reco::HitPattern hp = tk.hitPattern();
+      const reco::HitPattern &hp = tk.hitPattern();
       unsigned int sequLayers = 0;
       std::vector<bool> isNotValidVec;
       isNotValidVec.clear();