diff --git a/t/certs/6.cert.pem b/t/certs/6.cert.pem
new file mode 100644
index 0000000000000000000000000000000000000000..00301410865e702504c4562d99c3fc0528b83322
--- /dev/null
+++ b/t/certs/6.cert.pem
@@ -0,0 +1,71 @@
+-----BEGIN CERTIFICATE-----
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+-----BEGIN CERTIFICATE-----
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diff --git a/t/certs/6.key.pem b/t/certs/6.key.pem
new file mode 100644
index 0000000000000000000000000000000000000000..d702fa7b2e8cdbc0eec605bc23d7037b562c14cf
--- /dev/null
+++ b/t/certs/6.key.pem
@@ -0,0 +1,15 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----
diff --git a/t/certs/6.pem b/t/certs/6.pem
new file mode 100644
index 0000000000000000000000000000000000000000..8f98f19e9c1459eba5af48e43eef7d2c55b33382
--- /dev/null
+++ b/t/certs/6.pem
@@ -0,0 +1,86 @@
+-----BEGIN CERTIFICATE-----
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+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/t/certs/README.md b/t/certs/README.md
index 7b3f68a8821b5c8ba0e99a413b62f594956a6df3..4af2c7180640d997c252ffe17d5c109189fb2948 100644
--- a/t/certs/README.md
+++ b/t/certs/README.md
@@ -1,28 +1,32 @@
 =======
 # Certificates for ngx\_http\_voms\_module Testing 
 
-Proxy certificates are generated using [VOMS client 3.3.0](http://italiangrid.github.io/voms/documentation/voms-clients-guide/3.0.3/):
+Proxy certificates are generated using [VOMS client 3.3.1](http://italiangrid.github.io/voms/documentation/voms-clients-guide/3.0.3/):
 
- * 0.pem: long-lived proxy certificate, without Attribute Certificate (AC);
+ * 0.pem: long-lived proxy certificate, without any Attribute Certificate (AC);
  * 1.pem: long-lived proxy certificate, with an expired AC;
- * 2.pem: expired proxy certificate.
- * 3.pem: long-lived proxy with valid VOMS attributes
- * 4.pem: long-lived proxy with VOMS generic attributes containing reserved characters
- * 5.pem: long-lived proxy with VOMS AC signed by an untrusted CA
+ * 2.pem: expired proxy certificate;
+ * 3.pem: long-lived proxy with valid VOMS attributes;
+ * 4.pem: long-lived proxy with VOMS generic attributes containing reserved characters;
+ * 5.pem: long-lived proxy with valid VOMS attributes, `*.lsc` file missing in `vomsdir`. 
+ * 6.pem: long-lived proxy with valid VOMS attributes, with an old format for fqans. 
+
 
 To obtain such certificates the following command is used:
 
-	VOMS_CLIENTS_JAVA_OPTIONS="-Dvoms.fake.vo=test.vo -Dvoms.fake=true -Dvoms.fake.aaCert=<path_to_cert>/voms_example.cert.pem -Dvoms.fake.aaKey=<path_to_key>/voms_example.key.pem" voms-proxy-init3 -voms test.vo -cert <path_to_test0>/test0.p12 --valid <validity>
+        VOMS_CLIENTS_JAVA_OPTIONS="-Dvoms.fake.vo=test.vo -Dvoms.fake=true -Dvoms.fake.aaCert=<path_to_cert>/voms_example.cert.pem -Dvoms.fake.aaKey=<path_to_cert>/voms_example.key.pem -Dvoms.fake.notAfter=<AAAA-MM-GGT00:00:00 -Dvoms.fake.notBefore=AAAA-MM-GGT00:00:00 -Dvoms.fake.gas=<name>=<value>,<name>=<value> -Dvoms.fake.fqans=/<vo>/<fqan>,/<vo>/<fqan>/Role=<role> -Dvoms.fake.serial=<ac_serial_n>" voms-proxy-init -voms test.vo -cert <path_to_test0>/test0.p12 --valid <validity> --vomsdir <path_to_vomsdir>/vomsdir --certdir <path_to_trust_anchors>/trust-anchors/ 
 
-Once VOMS proxy certificates are generated in a `*.pem` format, they need to be split in certificates and key to be used in Openresty tests. `*.cert.pem` and `*.key.pem` files are obtained by simpling typing
+Once VOMS proxy certificates are generated in a `*.pem` format, they need to be split in certificates and key to be used in Openresty tests. `*.cert.pem` and `*.key.pem` files are obtained by simpling typing in `certs`
 
 	awk '/BEGIN RSA PRIVATE KEY/,/END RSA PRIVATE KEY/' <name>.pem > <name>.key.pem
 	awk '/BEGIN CERTIFICATE/,/END CERTIFICATE/' <name>.pem > <name>.cert.pem
 
-in the `certs` folder, where `<name>` could be for instance `0,1,2` etc.
+where `<name>` could be for instance `0,1,2,etc..`
+
+*voms\_example.cert.pem* and *voms\_example.ket.pem* can be found in `certs`.
 
-*voms\_example.cert.pem* and *voms\_example.ket.pem* can be found in the `certs` folder. 
+For *../untrusted.t*, *voms\_example\_2.cert.pem* and *voms\_example\_2.key.pem* are used as VOMS certificates and they are in `certs`. 
 
-To perform correctly the VOMS AC validation, a \*.lsc or \*.pem file is needed in `/etc/grid-security/vomsdir`, see [VOMS client 3.3.0 User Guide](http://italiangrid.github.io/voms/documentation/voms-clients-guide/3.0.3/) for further details. An example of *voms.example.lsc* can be found in `vomsdir/test.vo`.
+To perform correctly the VOMS AC validation, a \*.lsc or \*.pem file is needed in `/etc/grid-security/vomsdir`, see [VOMS client 3.3.1 User Guide](http://italiangrid.github.io/voms/documentation/voms-clients-guide/3.0.3/) for further details. An example of *voms.example.lsc* can be found in `vomsdir/test.vo`.
 
 Nginx server certificate and key  are nginx\_voms\_example.cert.pem and nginx\_voms\_example\_key.pem.
diff --git a/t/encoding.t b/t/encoding.t
index dfd9e4de6a6ebddeb6131d11d466a66b03aab362..c7663819d29d7084cb5b85389412da1978378a52 100644
--- a/t/encoding.t
+++ b/t/encoding.t
@@ -26,6 +26,7 @@ __DATA__
     }
 --- config
     location = / {
+        error_log logs/error-proxy.log debug;
         proxy_pass https://localhost:8443/;
         proxy_ssl_certificate ../../certs/4.cert.pem;
         proxy_ssl_certificate_key ../../certs/4.key.pem;
diff --git a/t/expired.t b/t/expired.t
index 188502b569cf99352c5ce28c6c156b00a9ae8166..f3ac305ef730c139d7e03eff4033ac919146e7c2 100644
--- a/t/expired.t
+++ b/t/expired.t
@@ -24,6 +24,7 @@ __DATA__
     }
 --- config
     location = / {
+        error_log logs/error-proxy.log debug;
         proxy_pass https://localhost:8443/;
         proxy_ssl_certificate ../../certs/2.cert.pem;
         proxy_ssl_certificate_key ../../certs/2.key.pem;
diff --git a/t/expired_ac.t b/t/expired_ac.t
index 2b07a96348f9c058dab569ef0ddd5f1daf30ed45..348cb1f88bcbae1680b4701b396b579aaeedd3e1 100644
--- a/t/expired_ac.t
+++ b/t/expired_ac.t
@@ -26,7 +26,8 @@ __DATA__
         }
     }
 --- config
-    location = / {
+    location = / { 
+        error_log logs/error-proxy.log debug;
         proxy_pass https://localhost:8443/;
         proxy_ssl_certificate ../../certs/1.cert.pem;
         proxy_ssl_certificate_key ../../certs/1.key.pem;
diff --git a/t/no_ac.t b/t/no_ac.t
index c08fd21ea8dbec57b30b7e7fd275c95e44f38f9f..677673d827543ccca8eb9b63f64fd69520b63373 100644
--- a/t/no_ac.t
+++ b/t/no_ac.t
@@ -26,6 +26,7 @@ __DATA__
     }
 --- config
     location = / {
+        error_log logs/error-proxy.log debug;
         proxy_pass https://localhost:8443/;
         proxy_ssl_certificate ../../certs/0.cert.pem;
         proxy_ssl_certificate_key ../../certs/0.key.pem;
diff --git a/t/no_ssl.t b/t/no_ssl.t
index 26c696a10b430331e155f4fd0f884ec86c18afa4..1ae8c64de3b0198ffafe3e59596d32c91ba939d4 100644
--- a/t/no_ssl.t
+++ b/t/no_ssl.t
@@ -20,6 +20,7 @@ __DATA__
     }
 --- config
     location = / {
+        error_log logs/error-proxy.log debug;
         proxy_pass http://localhost:8443/;
     }
 --- request
diff --git a/t/no_ta.t b/t/no_ta.t
new file mode 100644
index 0000000000000000000000000000000000000000..441430a6647431598bc3a08fd9892e5b997b526d
--- /dev/null
+++ b/t/no_ta.t
@@ -0,0 +1,38 @@
+
+use Test::Nginx::Socket 'no_plan';
+
+run_tests();
+
+__DATA__
+
+=== TEST 1: Valid proxy, wrong client trust-anchor 
+--- main_config
+    env OPENSSL_ALLOW_PROXY_CERTS=1;
+    env X509_VOMS_DIR=t/vomsdir;
+    env X509_CERT_DIR=t/trust-anchors;
+--- http_config
+    server {
+        error_log logs/error.log debug;
+        listen 8443 ssl;
+        ssl_certificate ../../certs/nginx_voms_example.cert.pem;
+        ssl_certificate_key ../../certs/nginx_voms_example.key.pem;
+        ssl_client_certificate ../../trust-anchors/igi-test-ca-2.pem;
+        ssl_verify_depth 10;
+        ssl_verify_client on;
+	location = / {
+            default_type text/plain;
+            echo $voms_fqans;
+        }
+    }
+--- config
+    location = / {
+        error_log logs/error-proxy.log debug;
+        proxy_pass https://localhost:8443/;
+        proxy_ssl_certificate ../../certs/3.cert.pem;
+        proxy_ssl_certificate_key ../../certs/3.key.pem;
+    }
+--- request
+GET / 
+--- error_code: 400
+
+
diff --git a/t/pippo b/t/pippo
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/t/ssl_no_client_authn.t b/t/ssl_no_client_authn.t
index e1042d60603ee70be8fb79af099ff1348365a497..d30f87fa79e5bd465c9f8c0acf66bbf7676b1c50 100644
--- a/t/ssl_no_client_authn.t
+++ b/t/ssl_no_client_authn.t
@@ -24,6 +24,7 @@ __DATA__
     }
 --- config
     location = / {
+        error_log logs/error-proxy.log debug;
         proxy_pass https://localhost:8443/;
     }
 --- request
diff --git a/t/untrusted_ac.t b/t/untrusted_ac.t
index dd93118364daec6290c2e7a1829207aca3f7c949..f7a97b31ddaf8b08fa7e0ec9a1a4a9d7d5b5005e 100644
--- a/t/untrusted_ac.t
+++ b/t/untrusted_ac.t
@@ -5,7 +5,7 @@ run_tests();
 
 __DATA__
 
-=== TEST 1: https with x509 client authentication, untrusted AC signature 
+=== TEST 1: https with x509 client authentication, untrusted AC signature LSC missing
 --- main_config
     env OPENSSL_ALLOW_PROXY_CERTS=1;
     env X509_VOMS_DIR=t/vomsdir;
@@ -26,12 +26,49 @@ __DATA__
     }
 --- config
     location = / {
+        error_log logs/error-proxy.log debug;
         proxy_pass https://localhost:8443/;
         proxy_ssl_certificate ../../certs/5.cert.pem;
         proxy_ssl_certificate_key ../../certs/5.key.pem;
     }
 --- request
 GET / 
+--- response_body_like eval
+qr/\n/
 --- error_log
 Cannot verify AC signature
 --- error_code: 200
+
+=== TEST 2: Valid proxy, VOMS trust-anchor missing
+--- main_config
+    env OPENSSL_ALLOW_PROXY_CERTS=1;
+    env X509_VOMS_DIR=t/vomsdir;
+    env X509_CERT_DIR=t;
+--- http_config
+    server {
+        error_log logs/error.log debug;
+        listen 8443 ssl;
+        ssl_certificate ../../certs/nginx_voms_example.cert.pem;
+        ssl_certificate_key ../../certs/nginx_voms_example.key.pem;
+        ssl_client_certificate ../../trust-anchors/igi-test-ca.pem;
+        ssl_verify_depth 10;
+        ssl_verify_client on;
+	location = / {
+            default_type text/plain;
+            echo $voms_fqans; 
+       }
+    }
+--- config
+    location = / {
+        proxy_pass https://localhost:8443/;
+        proxy_ssl_certificate ../../certs/3.cert.pem;
+        proxy_ssl_certificate_key ../../certs/3.key.pem;
+    }
+--- request
+GET /
+--- response_body_like eval
+qr/\n/
+--- error_log
+Cannot verify AC signature
+--- error_code: 200
+
diff --git a/t/valid_ac.t b/t/valid_ac.t
index f84fb9707bcb2ac6a1930d08d0de79eadc65d309..60aceafa76aa2d76c9c6819c14d42a2e13f9f424 100644
--- a/t/valid_ac.t
+++ b/t/valid_ac.t
@@ -36,6 +36,7 @@ __DATA__
     }
 --- config
     location = / {
+        error_log logs/error-proxy.log debug;
         proxy_pass https://localhost:8443/;
         proxy_ssl_certificate ../../certs/3.cert.pem;
         proxy_ssl_certificate_key ../../certs/3.key.pem;