diff --git a/examples/collection/do_flops.cc b/examples/collection/do_flops.cc
index 12b001da89..4565aad21d 100644
--- a/examples/collection/do_flops.cc
+++ b/examples/collection/do_flops.cc
@@ -87,7 +87,7 @@ do_flops( int n )
 double pi(uint64_t n) {
   double sum = 0.0;
   int sign = 1;
-  for (int i = 0; i < n; ++i) {
+  for (uint64_t i = 0; i < n; ++i) {
     sum += sign/(2.0*i+1.0);
     sign *= -1;
   }
@@ -132,7 +132,7 @@ struct GenericWork : vt::Collection<GenericWork, vt::Index1D> {
     { }
   };
 
-  void checkCompleteCB(double normRes) {
+  void checkCompleteCB() {
     auto const iter_max_reached = iter_ > maxIter_;
 
     if (iter_max_reached) {
@@ -160,7 +160,7 @@ struct GenericWork : vt::Collection<GenericWork, vt::Index1D> {
 
     auto proxy = this->getCollectionProxy();
     proxy.reduce<&GenericWork::checkCompleteCB, vt::collective::MaxOp>(
-      proxy[0], 0.0
+      proxy[0]
     );
 
     vt::theContext()->getTask()->stopPAPIMetrics();
diff --git a/src/vt/context/runnable_context/papi_data.h b/src/vt/context/runnable_context/papi_data.h
index 1e729e1b4a..8e273959d6 100644
--- a/src/vt/context/runnable_context/papi_data.h
+++ b/src/vt/context/runnable_context/papi_data.h
@@ -67,7 +67,7 @@ struct PAPIData {
 
     // check if the environment variable is set
     if (env_p == nullptr) {
-      std::cout << "Warning: Environment variabale VT_EVENTS not set, defaulting to instructions for the PAPI event set." << std::endl;
+      fmt::print("Warning: Environment variabale VT_EVENTS not set, defaulting to instructions for the PAPI event set.\n");
       native_events.push_back("instructions");
     }
     else {