diff --git a/lib/Test/More.pm b/lib/Test/More.pm
index c1be8e136..2fe26bb92 100644
--- a/lib/Test/More.pm
+++ b/lib/Test/More.pm
@@ -426,6 +426,7 @@ sub isnt ($$;$) {
 # warnings are enabled, so the user can silence the warning if they
 # wish.
 sub isn::t {
+    local $@; local $!;
     if (warnings::enabled("deprecated")) {
         _carp
         "Use of apostrophe as package separator was deprecated in Perl 5.37.9,\n",