diff --git a/tests/bip32_fixtures.py b/tests/bip32_fixtures.py
new file mode 100644
index 0000000..d801dbb
--- /dev/null
+++ b/tests/bip32_fixtures.py
@@ -0,0 +1,30 @@
+import pytest
+import random
+
+
+#@pytest.fixture
+#def gen_entropy(bit_size):
+    #rnd = random.systemRandom(123456)
+    #return rnd.randint(0, 255)
+
+@pytest.fixture
+def mnemonic_128():
+    return 'life evoke adult pen staff wrist start virtual hover cactus canoe web'
+
+@pytest.fixture
+def entropy_128():
+    return b'\xf8\xc40\x807?G\xa9\x7f\x9e\xa0\xa2`y8@'
+
+
+@pytest.yield_fixture
+def wordlist():
+    f = None
+    def select_wordlist(filename):
+        nonlocal f
+        assert f is None
+        f = open(filename)
+        return f
+    yield select_wordlist
+    if f is not None:
+        f.close()
+        
diff --git a/tests/test/conftest.py b/tests/test/conftest.py
new file mode 100644
index 0000000..cdc44e3
--- /dev/null
+++ b/tests/test/conftest.py
@@ -0,0 +1,6 @@
+# -*- coding: utf-8 -*-
+import pytest
+
+
+pytest_plugins = ['bip32_fixtures']
+
diff --git a/tests/test_bip32.py b/tests/test_bip32.py
new file mode 100644
index 0000000..ba2a23e
--- /dev/null
+++ b/tests/test_bip32.py
@@ -0,0 +1,117 @@
+import pybtc
+import os
+import random
+import hashlib
+import hmac
+from binascii import hexlify, unhexlify
+
+mnemonic_list=dict(english='/home/kav/develop/bitapps/pybtc/pybtc/bip-0039/english.txt')
+
+def test_generate_seed():
+    assert 1 == pybtc.generate_seed()
+
+
+def test_create_master_key():
+    assert 1
+
+def add_checksum(data):
+    mask = 0b10000000
+    data_int = int.from_bytes(data, byteorder="big")
+    data_bit_len = len(data) * 8 // 32
+    print('databitlen', data_bit_len)
+    data_hash = hashlib.sha256(data).hexdigest()
+    fbyte_hash = unhexlify(data_hash)[0]
+    print(bin(fbyte_hash))
+    while data_bit_len:
+        data_bit_len -= 1
+        data_int = (data_int << 1) | 1 if fbyte_hash & mask else data_int << 1
+        mask = mask >> 1
+    return data_int
+
+#def create_mnemonic(bits=256, language='english'):
+def create_mnemonic(bits=256, _wordlist=[]):
+    #english = wordlist(mnemonic_list[language]).read().split('\n')
+    english = _wordlist #('/home/kav/develop/bitapps/pybtc/pybtc/bip-0039/english.txt').read().split('\n')
+    #print(english)
+    passphrase = []
+    entropy = os.urandom(bits // 8)
+    entropy_int = int.from_bytes(entropy, byteorder="big")
+    print(entropy)
+    print('ent_int', entropy_int)
+    print(bin(entropy_int))
+    entropy_bit_len = len(entropy) * 8
+    chk_sum_bit_len = entropy_bit_len // 32
+    #sentence_len = (entropy_bit_len + chk_sum_bit_len) // 11
+    entropy_hash = hashlib.sha256(entropy).hexdigest()
+    fbyte_hash = unhexlify(entropy_hash)[0]
+    entropy_int = add_checksum(entropy)
+    print(bin(entropy_int))
+    while entropy_int:
+        passphrase.append(english[entropy_int & 0b11111111111])
+        entropy_int = entropy_int >> 11
+    return ' '.join(passphrase[::-1])
+
+
+def test_create_mnemonic(wordlist, entropy_128, mnemonic_128):
+    bits = 128
+    english = wordlist('/home/kav/develop/bitapps/pybtc/pybtc/bip-0039/english.txt').read().rstrip('\n').split('\n')
+    passphrase = create_mnemonic(bits, english)
+
+    #print(passphrase)
+    if bits == 128:
+        assert len(passphrase.split()) == 12
+    elif bits == 160:
+        assert len(passphrase.split()) == 15
+    elif bits == 192:
+        assert len(passphrase.split()) == 18
+    elif bits == 224:
+        assert len(passphrase.split()) == 21
+    elif bits == 256:
+        assert len(passphrase.split()) == 24
+    else:
+        assert 0
+
+# entropy int bin
+#0b10010101111101101101011000010010010011100001100010101110111100111000010111000001101101001111011110111010110010001101011011100011
+
+# first byte hash entropy
+#0b1111101
+
+# added checksum to entropy int bin
+#0b100101011111011011010110000100100100111000011000101011101111001110000101110000011011010011110111101110101100100011010110111000110111
+
+# passphrase
+#['shoulder', 'cup', 'stone', 'waste', 'custom', 'blade', 'keep', 'memory', 'order', 'loyal', 'repeat', 'nominee']
+    print(mnemonic2bytes(passphrase.split(), english))
+    assert 0
+
+
+
+
+def mnemonic2bytes(mnemonic, english):
+    wordlist_pos = dict()
+    for pos, word in enumerate(english):
+        wordlist_pos[word] = pos
+    
+    word_count = len(mnemonic)
+    ent_int = None
+    
+    bit_size = word_count * 11
+    chk_sum_bit_len = word_count * 11 % 32
+    
+    for word in mnemonic:
+        ent_int = (ent_int << 11) | wordlist_pos[word] if ent_int else wordlist_pos[word]
+
+    chk_sum = ent_int & (2**chk_sum_bit_len-1)
+    ent_int = ent_int >> chk_sum_bit_len
+    print('ent_int', ent_int)
+    print(bin(ent_int))
+    ent = ent_int.to_bytes((bit_size - chk_sum_bit_len) // 8, byteorder="big")
+
+    ent_hash = hashlib.sha256().hexdigest()
+    fb = unhexlify(ent_hash)[0]
+    print(fb)
+    print((fb >> (8 - chk_sum_bit_len)) & chk_sum)
+
+    return ent
+