What is the test for a certificate of probable cause?

granted, a certificate of probable cause. There are two exceptions: (1) a challenge to a search and seizure ruling, as to which an appeal is proper under section 1538.5, subdivision (m); and (2) post-plea sentencing issues. (See People v. Shelton (2006) 37 Cal.4th 759, 766; see also People v. Buttram (2003) 30 Cal.4th 773, 780.) Although defendant did not apply for a certificate of probable cause, he did make a motion to suppress. Furthermore, in his notice of appeal, defendant identifies only the ruling on his suppression motion as the ruling he challenges on appeal.² We therefore review only those portions of the record pertaining to defendant's motion to suppress.