diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/Certificate.java b/acme4j-client/src/main/java/org/shredzone/acme4j/Certificate.java
index da016fc2..058715cf 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/Certificate.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/Certificate.java
@@ -157,7 +157,7 @@ public class Certificate extends AcmeResource {
                 claims.put("reason", reason.getReasonCode());
             }
 
-            conn.sendSignedRequest(resUrl, claims, getSession(), getLogin().getKeyPair());
+            conn.sendSignedRequest(resUrl, claims, getLogin());
         } catch (CertificateEncodingException ex) {
             throw new AcmeProtocolException("Invalid certificate", ex);
         }
diff --git a/acme4j-client/src/test/java/org/shredzone/acme4j/CertificateTest.java b/acme4j-client/src/test/java/org/shredzone/acme4j/CertificateTest.java
index 15085ce8..9f56bcaf 100644
--- a/acme4j-client/src/test/java/org/shredzone/acme4j/CertificateTest.java
+++ b/acme4j-client/src/test/java/org/shredzone/acme4j/CertificateTest.java
@@ -131,11 +131,10 @@ public class CertificateTest {
             }
 
             @Override
-            public int sendSignedRequest(URL url, JSONBuilder claims, Session session, KeyPair keypair) {
+            public int sendSignedRequest(URL url, JSONBuilder claims, Login login) {
                 assertThat(url, is(resourceUrl));
                 assertThat(claims.toString(), sameJSONAs(getJSON("revokeCertificateRequest").toString()));
-                assertThat(session, is(notNullValue()));
-                assertThat(keypair, is(notNullValue()));
+                assertThat(login, is(notNullValue()));
                 certRequested = false;
                 return HttpURLConnection.HTTP_OK;
             }
@@ -179,11 +178,10 @@ public class CertificateTest {
             }
 
             @Override
-            public int sendSignedRequest(URL url, JSONBuilder claims, Session session, KeyPair keypair) {
+            public int sendSignedRequest(URL url, JSONBuilder claims, Login login) {
                 assertThat(url, is(resourceUrl));
                 assertThat(claims.toString(), sameJSONAs(getJSON("revokeCertificateWithReasonRequest").toString()));
-                assertThat(session, is(notNullValue()));
-                assertThat(keypair, is(notNullValue()));
+                assertThat(login, is(notNullValue()));
                 certRequested = false;
                 return HttpURLConnection.HTTP_OK;
             }