diff --git a/include/gsl/span b/include/gsl/span
index 445826c..20f4237 100644
--- a/include/gsl/span
+++ b/include/gsl/span
@@ -430,7 +430,7 @@ public:
     constexpr span(pointer firstElem, pointer lastElem) noexcept
         : storage_(firstElem, static_cast<std::size_t>(std::distance(firstElem, lastElem)))
     {
-        if (Extent != dynamic_extent) { Expects(lastElem - firstElem == Extent); }
+        if (Extent != dynamic_extent) { Expects(lastElem - firstElem == static_cast<difference_type>(Extent)); }
     }
 
     template <std::size_t N>
diff --git a/tests/span_tests.cpp b/tests/span_tests.cpp
index 8c5ac0d..1f5020b 100644
--- a/tests/span_tests.cpp
+++ b/tests/span_tests.cpp
@@ -1550,10 +1550,10 @@ TEST(span_test, from_array_constructor)
 
      // even when done dynamically
      {
-         span<int> s = arr;
          /*
          // this now results in a compile-time error, rather than runtime.
          // There is no suitable conversion from dynamic span to fixed span.
+         span<int> s = arr;
          auto f = [&]() {
              const span<int, 2> s2 = s;
              static_cast<void>(s2);