diff --git a/tests/data_files/test-ca.opensslconf b/tests/data_files/test-ca.opensslconf
index 16afebf..a642b73 100644
--- a/tests/data_files/test-ca.opensslconf
+++ b/tests/data_files/test-ca.opensslconf
@@ -103,7 +103,13 @@
 [directory_name_san]
 subjectAltName=dirName:dirname_sect
 
+[bad_second_directory_name_san]
+subjectAltName=dirName:dirname_sect, dirName:dirname_sect_bad
+
 [dirname_sect]
 C=UK
 O=Mbed TLS
 CN=Mbed TLS directoryName SAN
+
+[two_directorynames]
+O=MALFORM_ME