diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index 0a32b3b..5a56828 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -60,6 +60,14 @@
 	$(OPENSSL) pkey -in $< -out $@ -inform PEM -outform DER -passin "pass:$(test_ca_pwd_rsa)"
 all_final += test-ca.key.der
 
+# This is only used for generating cert_example_multi_nocn.crt
+test-ca_nocn.crt: $(test_ca_key_file_rsa)
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 selfsign=1 \
+		subject_key=$(test_ca_key_file_rsa) subject_pwd=$(test_ca_pwd_rsa)  subject_name="C=NL" \
+		issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) issuer_name="C=NL" \
+		not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
+all_intermediate += test-ca_nocn.crt
+
 test-ca-sha1.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
 	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
 all_final += test-ca-sha1.crt
@@ -99,6 +107,14 @@
 		-passin "pass:$(test_ca_pwd_rsa)" -set_serial 17 -days 3653 -sha256 \
 		-in $< > $@
 
+cert_example_multi_nocn.csr: rsa_pkcs1_1024_clear.pem
+	$(MBEDTLS_CERT_REQ) filename=$< output_file=$@ subject_name='C=NL'
+all_intermediate += cert_example_multi_nocn.csr
+
+cert_example_multi_nocn.crt: cert_example_multi_nocn.csr test-ca_nocn.crt
+	$(OPENSSL) x509 -req -CA test-ca_nocn.crt -CAkey $(test_ca_key_file_rsa) -extfile $(test_ca_config_file) -extensions ext_multi_nocn -passin "pass:$(test_ca_pwd_rsa)" -set_serial  0xf7c67ff8e9a963f9 -days 3653 -sha1 -in $< > $@
+all_final += cert_example_multi_nocn.crt
+
 parse_input/test_csr_v3_keyUsage.csr.der: rsa_pkcs1_1024_clear.pem
 	$(OPENSSL) req -new -subj '/CN=etcd' -config $(test_ca_config_file) -key rsa_pkcs1_1024_clear.pem -outform DER -out $@ -reqexts csr_ext_v3_keyUsage
 parse_input/test_csr_v3_subjectAltName.csr.der: rsa_pkcs1_1024_clear.pem
diff --git a/tests/data_files/test-ca.opensslconf b/tests/data_files/test-ca.opensslconf
index 434876c..0340e9e 100644
--- a/tests/data_files/test-ca.opensslconf
+++ b/tests/data_files/test-ca.opensslconf
@@ -41,6 +41,11 @@
 [multiple_san]
 subjectAltName=@alt_names
 
+[ext_multi_nocn]
+basicConstraints = CA:false
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment
+subjectAltName = DNS:www.shotokan-braunschweig.de,DNS:www.massimo-abate.eu,IP:192.168.1.1,IP:192.168.69.144
+
 [hw_module_name]
 hwtype = OID:1.3.6.1.4.1.17.3
 hwserial = OCT:123456