diff --git a/core/nkode_api_test.go b/core/nkode_api_test.go
index 0313a9e..74d4177 100644
--- a/core/nkode_api_test.go
+++ b/core/nkode_api_test.go
@@ -86,7 +86,7 @@ func testNKodeAPI(t *testing.T, db DbAccessor) {
 		sessionId, err = SessionIdFromString(sessionIdStr)
 		assert.NoError(t, err)
 		keypadSize = KeypadDimension{AttrsPerKey: numbOfKeys, NumbOfKeys: numbOfKeys}
-		userPasscode = setInterface[:passcodeLen+1]
+		userPasscode = setInterface[:passcodeLen]
 		setKeySelect, err = SelectKeyByAttrIdx(setInterface, userPasscode, keypadSize)
 		assert.NoError(t, err)
 		confirmInterface, err = nkodeApi.SetNKode(*customerId, sessionId, setKeySelect)