diff --git a/nano/keys_test.go b/nano/keys_test.go
index 32a0d444..b46e4c9f 100644
--- a/nano/keys_test.go
+++ b/nano/keys_test.go
@@ -11,17 +11,52 @@ import (
 func TestLedgerKeys(t *testing.T) {
 	assert, require := assert.New(t), require.New(t)
 
-	// cryptoCase from sign_test
 	cases := []struct {
 		msg, pubkey, sig string
 		valid            bool
 	}{
-		{
+		0: {
 			msg:    "F00D",
 			pubkey: "8E8754F012C2FDB492183D41437FD837CB81D8BBE731924E2E0DAF43FD3F2C93",
 			sig:    "787DC03E9E4EE05983E30BAE0DEFB8DB0671DBC2F5874AC93F8D8CA4018F7A42D6F9A9BCEADB422AC8E27CEE9CA205A0B88D22CD686F0A43EB806E8190A3C400",
 			valid:  true,
 		},
+		1: {
+			msg:    "DEADBEEF",
+			pubkey: "0C45ADC887A5463F668533443C829ED13EA8E2E890C778957DC28DB9D2AD5A6C",
+			sig:    "00ED74EED8FDAC7988A14BF6BC222120CBAC249D569AF4C2ADABFC86B792F97DF73C4919BE4B6B0ACB53547273BF29FBF0A9E0992FFAB6CB6C9B09311FC86A00",
+			valid:  true,
+		},
+		2: {
+			msg:    "1234567890AA",
+			pubkey: "598FC1F0C76363D14D7480736DEEF390D85863360F075792A6975EFA149FD7EA",
+			sig:    "59AAB7D7BDC4F936B6415DE672A8B77FA6B8B3451CD95B3A631F31F9A05DAEEE5E7E4F89B64DDEBB5F63DC042CA13B8FCB8185F82AD7FD5636FFDA6B0DC9570B",
+			valid:  true,
+		},
+		3: {
+			msg:    "1234432112344321",
+			pubkey: "359E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:    "616B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid:  true,
+		},
+		4: {
+			msg:    "12344321123443",
+			pubkey: "359E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:    "616B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid:  false,
+		},
+		5: {
+			msg:    "1234432112344321",
+			pubkey: "459E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:    "616B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid:  false,
+		},
+		6: {
+			msg:    "1234432112344321",
+			pubkey: "359E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:    "716B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid:  false,
+		},
 	}
 
 	for i, tc := range cases {
diff --git a/nano/sign_test.go b/nano/sign_test.go
index 2521514e..89bd7568 100644
--- a/nano/sign_test.go
+++ b/nano/sign_test.go
@@ -74,12 +74,48 @@ func TestCryptoConvert(t *testing.T) {
 	assert, require := assert.New(t), require.New(t)
 
 	cases := []cryptoCase{
-		{
+		0: {
 			msg:   "F00D",
 			key:   "8E8754F012C2FDB492183D41437FD837CB81D8BBE731924E2E0DAF43FD3F2C93",
 			sig:   "787DC03E9E4EE05983E30BAE0DEFB8DB0671DBC2F5874AC93F8D8CA4018F7A42D6F9A9BCEADB422AC8E27CEE9CA205A0B88D22CD686F0A43EB806E8190A3C400",
 			valid: true,
 		},
+		1: {
+			msg:   "DEADBEEF",
+			key:   "0C45ADC887A5463F668533443C829ED13EA8E2E890C778957DC28DB9D2AD5A6C",
+			sig:   "00ED74EED8FDAC7988A14BF6BC222120CBAC249D569AF4C2ADABFC86B792F97DF73C4919BE4B6B0ACB53547273BF29FBF0A9E0992FFAB6CB6C9B09311FC86A00",
+			valid: true,
+		},
+		2: {
+			msg:   "1234567890AA",
+			key:   "598FC1F0C76363D14D7480736DEEF390D85863360F075792A6975EFA149FD7EA",
+			sig:   "59AAB7D7BDC4F936B6415DE672A8B77FA6B8B3451CD95B3A631F31F9A05DAEEE5E7E4F89B64DDEBB5F63DC042CA13B8FCB8185F82AD7FD5636FFDA6B0DC9570B",
+			valid: true,
+		},
+		3: {
+			msg:   "1234432112344321",
+			key:   "359E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:   "616B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid: true,
+		},
+		4: {
+			msg:   "12344321123443",
+			key:   "359E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:   "616B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid: false,
+		},
+		5: {
+			msg:   "1234432112344321",
+			key:   "459E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:   "616B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid: false,
+		},
+		6: {
+			msg:   "1234432112344321",
+			key:   "359E0636E780457294CCA5D2D84DB190C3EDBD6879729C10D3963DEA1D5D8120",
+			sig:   "716B44EC7A65E7C719C170D669A47DE80C6AC0BB13FBCC89230976F9CC14D4CF9ECF26D4AFBB9FFF625599F1FF6F78EDA15E9F6B6BDCE07CFE9D8C407AC45208",
+			valid: false,
+		},
 	}
 
 	for i, tc := range cases {
@@ -93,7 +129,7 @@ func TestCryptoConvert(t *testing.T) {
 
 		// it is not the signature of the message itself
 		valid := pk.VerifyBytes(msg, psig)
-		assert.NotEqual(tc.valid, valid, "%d", i)
+		assert.False(valid, "%d", i)
 
 		// but rather of the hash of the msg
 		hmsg := hashMsg(msg)