diff --git a/include/gsl/span b/include/gsl/span
index 6c1b2cd..3daf16f 100644
--- a/include/gsl/span
+++ b/include/gsl/span
@@ -521,11 +521,15 @@ public:
         Expects(size() > 0);
         return data()[size() - 1];
     }
-
-
+    
+    // at and operator() are deprecated to align to the public member functions of std::span
+    [[deprecated("Use operator[]")]]
     constexpr reference at(index_type idx) const noexcept{ return this->operator[](idx); }
+    [[deprecated("Use operator[]")]]
     constexpr reference operator()(index_type idx) const noexcept{ return this->operator[](idx); }
 
+
+
     constexpr pointer data() const noexcept { return storage_.data(); }
 
     // [span.iter], span iterator support
diff --git a/tests/span_tests.cpp b/tests/span_tests.cpp
index 5885328..28c97f5 100644
--- a/tests/span_tests.cpp
+++ b/tests/span_tests.cpp
@@ -17,8 +17,7 @@
 #ifdef _MSC_VER
 // blanket turn off warnings from CppCoreCheck from catch
 // so people aren't annoyed by them when running the tool.
-#pragma warning(disable : 26440 26426 26497 4189) // from catch
-
+#pragma warning(disable : 26440 26426 26497 4189 4996)
 #endif
 
 #if __clang__ || __GNUC__
@@ -26,6 +25,7 @@
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wundef"
 #pragma GCC diagnostic ignored "-Wunused-variable"
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif // __clang__ || __GNUC__
 
 #if __clang__