diff --git a/tests/data_files/opensslcnf/server9.crt.v3_ext b/tests/data_files/opensslcnf/server9.crt.v3_ext
new file mode 100644
index 0000000..f8d201b
--- /dev/null
+++ b/tests/data_files/opensslcnf/server9.crt.v3_ext
@@ -0,0 +1,4 @@
+basicConstraints = CA:false
+subjectKeyIdentifier=hash
+authorityKeyIdentifier=keyid:always,issuer:always
+