1 files changed, 58 insertions, 10 deletions
diff --git a/spec/ruby/core/string/unpack/shared/float.rb b/spec/ruby/core/string/unpack/shared/float.rb
index 99bd8a3401..93282bf4c9 100644
--- a/spec/ruby/core/string/unpack/shared/float.rb
+++ b/spec/ruby/core/string/unpack/shared/float.rb
@@ -56,9 +56,21 @@ describe :string_unpack_float_le, shared: true do
     [nan_value].pack(unpack_format).unpack(unpack_format).first.nan?.should be_true
   end
 
-  it "ignores NULL bytes between directives" do
-    array = "\x9a\x999@33\xb3?".unpack(unpack_format("\000", 2))
-    array.should == [2.9000000953674316, 1.399999976158142]
+  ruby_version_is ""..."3.3" do
+    it "ignores NULL bytes between directives" do
+      suppress_warning do
+        array = "\x9a\x999@33\xb3?".unpack(unpack_format("\000", 2))
+        array.should == [2.9000000953674316, 1.399999976158142]
+      end
+    end
+  end
+
+  ruby_version_is "3.3" do
+    it "raise ArgumentError for NULL bytes between directives" do
+      -> {
+        "\x9a\x999@33\xb3?".unpack(unpack_format("\000", 2))
+      }.should raise_error(ArgumentError, /unknown unpack directive/)
+    end
   end
 
   it "ignores spaces between directives" do
@@ -123,9 +135,21 @@ describe :string_unpack_float_be, shared: true do
     [nan_value].pack(unpack_format).unpack(unpack_format).first.nan?.should be_true
   end
 
-  it "ignores NULL bytes between directives" do
-    array = "@9\x99\x9a?\xb333".unpack(unpack_format("\000", 2))
-    array.should == [2.9000000953674316, 1.399999976158142]
+  ruby_version_is ""..."3.3" do
+    it "ignores NULL bytes between directives" do
+      suppress_warning do
+        array = "@9\x99\x9a?\xb333".unpack(unpack_format("\000", 2))
+        array.should == [2.9000000953674316, 1.399999976158142]
+      end
+    end
+  end
+
+  ruby_version_is "3.3" do
+    it "raise ArgumentError for NULL bytes between directives" do
+      -> {
+        "@9\x99\x9a?\xb333".unpack(unpack_format("\000", 2))
+      }.should raise_error(ArgumentError, /unknown unpack directive/)
+    end
   end
 
   it "ignores spaces between directives" do
@@ -193,8 +217,20 @@ describe :string_unpack_double_le, shared: true do
     [nan_value].pack(unpack_format).unpack(unpack_format).first.nan?.should be_true
   end
 
-  it "ignores NULL bytes between directives" do
-    "333333\x07@ffffff\xf6?".unpack(unpack_format("\000", 2)).should == [2.9, 1.4]
+  ruby_version_is ""..."3.3" do
+    it "ignores NULL bytes between directives" do
+      suppress_warning do
+        "333333\x07@ffffff\xf6?".unpack(unpack_format("\000", 2)).should == [2.9, 1.4]
+      end
+    end
+  end
+
+  ruby_version_is "3.3" do
+    it "raise ArgumentError for NULL bytes between directives" do
+      -> {
+        "333333\x07@ffffff\xf6?".unpack(unpack_format("\000", 2))
+      }.should raise_error(ArgumentError, /unknown unpack directive/)
+    end
   end
 
   it "ignores spaces between directives" do
@@ -261,8 +297,20 @@ describe :string_unpack_double_be, shared: true do
     [nan_value].pack(unpack_format).unpack(unpack_format).first.nan?.should be_true
   end
 
-  it "ignores NULL bytes between directives" do
-    "@\x07333333?\xf6ffffff".unpack(unpack_format("\000", 2)).should == [2.9, 1.4]
+  ruby_version_is ""..."3.3" do
+    it "ignores NULL bytes between directives" do
+      suppress_warning do
+        "@\x07333333?\xf6ffffff".unpack(unpack_format("\000", 2)).should == [2.9, 1.4]
+      end
+    end
+  end
+
+  ruby_version_is "3.3" do
+    it "raise ArgumentError for NULL bytes between directives" do
+      -> {
+        "@\x07333333?\xf6ffffff".unpack(unpack_format("\000", 2))
+      }.should raise_error(ArgumentError, /unknown unpack directive/)
+    end
   end
 
   it "ignores spaces between directives" do