diff --git a/library/x509_crt.c b/library/x509_crt.c
index fdcc969..315d98b 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -1492,9 +1492,9 @@
 
         md( md_info, crl_list->tbs.p, crl_list->tbs.len, hash );
 
-        if( pk_can_do( &ca->pk, crl_list->sig_pk ) == 0 ||
-            pk_verify( &ca->pk, crl_list->sig_md, hash, md_info->size,
-                       crl_list->sig.p, crl_list->sig.len ) != 0 )
+        if( pk_verify_ext( crl_list->sig_pk, crl_list->sig_opts, &ca->pk,
+                           crl_list->sig_md, hash, md_info->size,
+                           crl_list->sig.p, crl_list->sig.len ) != 0 )
         {
             flags |= BADCRL_NOT_TRUSTED;
             break;
diff --git a/tests/data_files/crl-rsa-pss-sha1-badsign.pem b/tests/data_files/crl-rsa-pss-sha1-badsign.pem
new file mode 100644
index 0000000..7e2a596
--- /dev/null
+++ b/tests/data_files/crl-rsa-pss-sha1-badsign.pem
@@ -0,0 +1,14 @@
+-----BEGIN X509 CRL-----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+-----END X509 CRL-----
diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data
index 3dff51e..22e92dc 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -576,29 +576,37 @@
 
 X509 Certificate verification #58 (Valid, RSASSA-PSS, SHA-224)
 depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA256_C
-x509_verify:"data_files/server9-sha224.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha224.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha224.pem":"NULL":0:0:"NULL"
 
 X509 Certificate verification #59 (Valid, RSASSA-PSS, SHA-256)
 depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA256_C
-x509_verify:"data_files/server9-sha256.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha256.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha256.pem":"NULL":0:0:"NULL"
 
 X509 Certificate verification #60 (Valid, RSASSA-PSS, SHA-384)
 depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA512_C
-x509_verify:"data_files/server9-sha384.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha384.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha384.pem":"NULL":0:0:"NULL"
 
 X509 Certificate verification #61 (Valid, RSASSA-PSS, SHA-512)
 depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA512_C
-x509_verify:"data_files/server9-sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha512.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha512.pem":"NULL":0:0:"NULL"
 
-X509 Certificate verification #57 (Valid, RSASSA-PSS, SHA-1, not top)
+X509 Certificate verification #62 (Revoked, RSASSA-PSS, SHA-1)
+depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA1_C
+x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1.pem":"NULL":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_REVOKED:"NULL"
+
+X509 Certificate verification #63 (Revoked, RSASSA-PSS, SHA-1, CRL badsign)
+depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA1_C
+x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1-badsign.pem":"NULL":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCRL_NOT_TRUSTED:"NULL"
+
+X509 Certificate verification #64 (Valid, RSASSA-PSS, SHA-1, not top)
 depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA1_C
 x509_verify:"data_files/server9-with-ca.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
 
-X509 Certificate verification #62 (RSASSA-PSS, SHA1, bad signature)
+X509 Certificate verification #65 (RSASSA-PSS, SHA1, bad cert signature)
 depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA1_C
 x509_verify:"data_files/server9-badsign.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_NOT_TRUSTED:"NULL"
 
-X509 Certificate verification #63 (RSASSA-PSS, SHA1, no RSA CA)
+X509 Certificate verification #66 (RSASSA-PSS, SHA1, no RSA CA)
 depends_on:POLARSSL_PEM_PARSE_C:POLARSSL_RSASSA_PSS_CERTIFICATES:POLARSSL_SHA1_C
 x509_verify:"data_files/server9.crt":"data_files/test-ca2.crt":"data_files/crl.pem":"NULL":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_NOT_TRUSTED:"NULL"