diff --git a/hdkeychain/test_coverage.txt b/hdkeychain/test_coverage.txt
index 8673aef..c0bc7ef 100644
--- a/hdkeychain/test_coverage.txt
+++ b/hdkeychain/test_coverage.txt
@@ -1,8 +1,10 @@
 
-github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.String		 100.00% (16/16)
+github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.String		 100.00% (18/18)
+github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.Zero		 100.00% (9/9)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.pubKeyBytes	 100.00% (7/7)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.Neuter		 100.00% (6/6)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.ECPrivKey		 100.00% (4/4)
+github.com/conformal/btcutil/hdkeychain/extendedkey.go	 zero				 100.00% (3/3)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.SetNet		 100.00% (3/3)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.Address		 100.00% (2/2)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 newExtendedKey			 100.00% (1/1)
@@ -14,5 +16,5 @@ github.com/conformal/btcutil/hdkeychain/extendedkey.go	 NewKeyFromString		 95.83
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 ExtendedKey.Child		 91.67% (33/36)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 NewMaster			 91.67% (11/12)
 github.com/conformal/btcutil/hdkeychain/extendedkey.go	 GenerateSeed			 85.71% (6/7)
-github.com/conformal/btcutil/hdkeychain			 -----------------------------	 95.08% (116/122)
+github.com/conformal/btcutil/hdkeychain			 -----------------------------	 95.59% (130/136)