# Which Problems Are Solved
Similar to https://github.com/zitadel/zitadel/pull/11241, there are
additional unit tests where certificates expired.
# How the Problems Are Solved
The tests use dedicated combinations of SAML metadata, certificates and
responses and also already use the `TimeNow` function from the
`crewjam/saml` package to overwrite necessary time validations. This PR
now additionally sets the `Clock` variable in the same package, which is
used in XML validations like the signing.
# Additional Changes
None
# Additional Context
- relates to #11241
- requires backport to at least v4.x
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