diff --git a/contrib/metaphysicl/0.2.0/test/navier_unit.h b/contrib/metaphysicl/0.2.0/test/navier_unit.h
index f5367de7252..7bf9309dc89 100644
--- a/contrib/metaphysicl/0.2.0/test/navier_unit.h
+++ b/contrib/metaphysicl/0.2.0/test/navier_unit.h
@@ -142,6 +142,12 @@ int main(void)
           vrnorm_max = std::max(vrnorm, vrnorm_max);
           prnorm_max = std::max(prnorm, prnorm_max);
           ernorm_max = std::max(ernorm, ernorm_max);
+#else
+          // Avoid "set but not used" variable warnings;
+          (void) s2u;
+          (void) s2v;
+          (void) s2p;
+          (void) s2e;
 #endif // METAPHYSICL_HAVE_MASA
 
 	}
diff --git a/contrib/metaphysicl/0.2.0/test/pde_unit.h b/contrib/metaphysicl/0.2.0/test/pde_unit.h
index af6342cfb69..f658d026f5e 100644
--- a/contrib/metaphysicl/0.2.0/test/pde_unit.h
+++ b/contrib/metaphysicl/0.2.0/test/pde_unit.h
@@ -106,6 +106,12 @@ int main(void)
           vrnorm_max = std::max(vrnorm, vrnorm_max);
           prnorm_max = std::max(prnorm, prnorm_max);
           ernorm_max = std::max(ernorm, ernorm_max);
+#else
+          // Avoid "set but not used" variable warnings;
+          (void) s2u;
+          (void) s2v;
+          (void) s2p;
+          (void) s2e;
 #endif // METAPHYSICL_HAVE_MASA
 
 	}