diff --git a/spec/eth/abi/packed/encoder_spec.rb b/spec/eth/abi/packed/encoder_spec.rb
index 0c057392f..31fdf8f7c 100644
--- a/spec/eth/abi/packed/encoder_spec.rb
+++ b/spec/eth/abi/packed/encoder_spec.rb
@@ -276,6 +276,7 @@
       expect(Abi.solidity_packed ["bytes32"], ["0x" + "a" * 30]).to eq "0x" + "a" * 30
       expect(Abi.solidity_packed ["bytes4"], ["0xab"]).to eq "0xab"
       expect(Abi.solidity_packed ["bytes2"], ["0x"]).to eq "0x"
+      expect(Abi.solidity_packed ["hash256"], ["0x" + "a" * 30]).to eq "0x" + "a" * 30
     end
 
     it "keeps reading hex of 2N digits as hex" do