diff --git a/ports-of-call/array.hpp b/ports-of-call/array.hpp
index 833f1a9b..67dbd0c1 100644
--- a/ports-of-call/array.hpp
+++ b/ports-of-call/array.hpp
@@ -2,6 +2,7 @@
 #define _PORTS_OF_CALL_ARRAY_HPP_
 
 #include "portability.hpp"
+#include "portable_errors.hpp"
 
 #include <cstddef>
 #include <iterator>
diff --git a/test/test_array.hpp b/test/test_array.hpp
index 39615547..4e84c118 100644
--- a/test/test_array.hpp
+++ b/test/test_array.hpp
@@ -11,7 +11,7 @@ TEST_CASE("array nominal element access (GPU)", "[array][GPU]") {
   array<double, N> arr;
 
   int count = 0;
-  auto func = PORTABLE_LAMBDA(const int i, int & count) {
+  auto func = PORTABLE_LAMBDA(const int i, int & count) mutable {
     // Fill the array
     arr[i] = i + 1;
     // Can we read from it?
@@ -19,7 +19,7 @@ TEST_CASE("array nominal element access (GPU)", "[array][GPU]") {
       ++count;
     }
   };
-  PortsOfCall::parallelReduce("assign_and_check", 0, N, func, count);
+  portableReduce("assign_and_check", 0, N, func, count);
   CHECK(count == N);
 }
 
@@ -198,7 +198,7 @@ TEST_CASE("array sizes", "[array]") {
 TEST_CASE("array fill (GPU)", "[array][GPU]") {
   constexpr std::size_t N = 42;
   std::size_t count = 0;
-  auto func = PORTABLE_LAMBDA(const int i, int & count) {
+  auto func = PORTABLE_LAMBDA(const int i, std::size_t & count) {
       constexpr double value = 3.14;
       array<double, N> arr;
       arr.fill(value);
@@ -207,7 +207,7 @@ TEST_CASE("array fill (GPU)", "[array][GPU]") {
       }
   };
   constexpr std::size_t M = 5;
-  PortsOfCall::parallelReduce("check", 0, M, func, count);
+  portableReduce("check", 0, M, func, count);
   CHECK(count == N * M);
 }