diff --git a/src/core/IO/Handle.pm b/src/core/IO/Handle.pm
index debb60e8351..40bffae7958 100644
--- a/src/core/IO/Handle.pm
+++ b/src/core/IO/Handle.pm
@@ -674,9 +674,8 @@ my class IO::Handle {
 
     proto method slurp-rest(|) { * }
     multi method slurp-rest(IO::Handle:D: :$bin! where *.so, :$close --> Buf:D) {
-        # NOTE: THIS METHOD WILL BE DEPRECATED IN 6.d in favour of .slurp()
-        # Testing of it in roast master has been removed and only kept in 6.c
-        # If you're changing this code for whatever reason, test with 6.c-errata
+        DEPRECATED '.slurp', '6.d', '6.e', :lang-vers;
+
         LEAVE self.close if $close;
         my $res := buf8.new;
         loop {
@@ -687,9 +686,8 @@ my class IO::Handle {
         }
     }
     multi method slurp-rest(IO::Handle:D: :$enc, :$bin, :$close --> Str:D) {
-        # NOTE: THIS METHOD WILL BE DEPRECATED IN 6.d in favour of .slurp()
-        # Testing of it in roast master has been removed and only kept in 6.c
-        # If you're changing this code for whatever reason, test with 6.c-errata
+        DEPRECATED '.slurp', '6.d', '6.e', :lang-vers;
+
         $!decoder or die X::IO::BinaryMode.new(:trying<slurp-rest>);
         LEAVE self.close if $close;
         self.encoding($enc) if $enc.defined;
diff --git a/t/02-rakudo/v6.d-tests/01-deprecations.t b/t/02-rakudo/v6.d-tests/01-deprecations.t
index 01fa3d1974c..b6075394b09 100644
--- a/t/02-rakudo/v6.d-tests/01-deprecations.t
+++ b/t/02-rakudo/v6.d-tests/01-deprecations.t
@@ -2,7 +2,7 @@ use lib <t/spec/packages/>;
 use Test;
 use Test::Util;
 
-plan 10;
+plan 11;
 
 # XXX TODO: swap v6.d.PREVIEW to v6.d, once the latter is available
 constant $v6d = 'v6.d.PREVIEW';
@@ -35,3 +35,10 @@ is-newly-deprecated ｢$ = 4.2.FatRat: 42｣;
 is-newly-deprecated ｢$ = FatRat.new(4,2).Rat: 42｣;
 is-newly-deprecated ｢$ = FatRat.new(4,2).FatRat: 42｣;
 is-newly-deprecated ｢".".IO.chdir: "."｣;
+
+subtest 'IO::Handle.slurp-rest' => {
+    plan 4;
+    my $file := make-temp-file(:content<foo>).absolute.perl;
+    is-newly-deprecated "$file.IO.open.slurp-rest";
+    is-newly-deprecated "$file.IO.open.slurp-rest: :bin";
+}