diff --git a/test/io/buffer.rb b/test/io/buffer.rb
new file mode 100644
index 0000000..604f54b
--- /dev/null
+++ b/test/io/buffer.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+# Released under the MIT License.
+# Copyright, 2024, by Samuel Williams.
+
+describe IO::Buffer do
+	it "can copy a large buffer (releasing the GVL)" do
+		source = IO::Buffer.new(1024 * 1024 * 10)
+		destination = IO::Buffer.new(source.size)
+		
+		source.copy(destination)
+	end
+end
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