diff --git a/src/test/scala/com/github/fluency03/blockchain/crypto/SHA256Test.scala b/src/test/scala/com/github/fluency03/blockchain/crypto/SHA256Test.scala
index e159c4f..5159c12 100644
--- a/src/test/scala/com/github/fluency03/blockchain/crypto/SHA256Test.scala
+++ b/src/test/scala/com/github/fluency03/blockchain/crypto/SHA256Test.scala
@@ -32,12 +32,23 @@ class SHA256Test extends FlatSpec with Matchers {
       "B26C6C34383088C705DF262F644BE0C3CA2C2E4319ADF3075397DF5E599F2B754E6AB667C").hex2Bytes) shouldEqual
       "0261107E41495C0DDC3850CD205D32896133EDD2ADDEBE7D8E20E01EFD078710".toLowerCase
 
+    SHA256.hashHexs(
+      "04b4d653fcbb4b96000c99343f23b08a44fa306031e0587f9e657ab4a25411",
+      "29368d7d9bb05cd8afbdf7705a6540d98028236965553f91bf1c5b4f70073f55b55d") shouldEqual
+      "173BDED8F2A2069C193E63EA30DC8FD20E815EC3642B9C24AD7002C03D1BFB9B".toLowerCase
+
     SHA256.hash("00A6020CF86FECEDEEF8859C172BAA1A15A575BC6F".hex2Bytes) shouldEqual
       "9C3AC7CD5D2673694C492CC508D788CBCACCDD357956EBCF10BD6C5BDF67AA5C".toLowerCase
 
+    SHA256.hashHex("00A6020CF86FECEDEEF8859C172BAA1A15A575BC6F") shouldEqual
+      "9C3AC7CD5D2673694C492CC508D788CBCACCDD357956EBCF10BD6C5BDF67AA5C".toLowerCase
+
     SHA256.hash("9C3AC7CD5D2673694C492CC508D788CBCACCDD357956EBCF10BD6C5BDF67AA5C".hex2Bytes) shouldEqual
       "27D7CF19837C3D3F713BDB483CB98A00D2917D5039D71348E90ADC68D2399F6D".toLowerCase
 
+    SHA256.hashHex("9C3AC7CD5D2673694C492CC508D788CBCACCDD357956EBCF10BD6C5BDF67AA5C") shouldEqual
+      "27D7CF19837C3D3F713BDB483CB98A00D2917D5039D71348E90ADC68D2399F6D".toLowerCase
+
     SHA256.hash256("00010966776006953D5567439E5E39F86A0D273BEE".hex2Bytes) shouldEqual
       "D61967F63C7DD183914A4AE452C9F6AD5D462CE3D277798075B107615C1A8A30".toLowerCase