Linux's /dev/urandom and Python's os.urandom does not pass

[phmngcthanh]

import os print( bin(int.from_bytes(os.urandom(1024),'big')))
does not pass Maurer test (09) and approx. Entropy test (12)

print( bin(int.from_bytes(open('/dev/urandom','rb').read(1024),'big'))) does not pass Maurer test (09) and randomly, does not pass approx. Entropy test (12) too

[phmngcthanh]

I tried on Python 3.6.9 (default, Jun 29 2022, 11:45:57) [GCC 8.4.0] on linux, using Jetson Nano's Linux
I wonder, does it imply that both incompliance to NIST, or something else

[ThexXTURBOXx]

Maurer's Test is only applicable for bit strings of length >= 387840.
As for the approximate entropy test, I think that with enough data (at least 10^6 or something), it might actually pass.
If your bit string is not long enough, the tests might "randomly" fail.

For even more reference, see section 4.3: https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-22r1a.pdf