diff --git a/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderIT.java b/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderIT.java
index 2226e810..c8714c08 100644
--- a/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderIT.java
+++ b/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderIT.java
@@ -209,8 +209,8 @@ public class OrderIT extends PebbleITBase {
         Certificate certificate = order.getCertificate();
         X509Certificate cert = certificate.getCertificate();
         assertThat(cert, not(nullValue()));
-        assertThat(cert.getNotBefore().toInstant(), is(notNullValue()));
-        assertThat(cert.getNotAfter().toInstant(), is(notNullValue()));
+        assertThat(cert.getNotBefore().toInstant(), is(notBefore));
+        assertThat(cert.getNotAfter().toInstant(), is(notAfter));
         assertThat(cert.getSubjectX500Principal().getName(), containsString("CN=" + domain));
 
         for (Authorization auth :  order.getAuthorizations()) {
diff --git a/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderWildcardIT.java b/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderWildcardIT.java
index 0cc3d001..43733393 100644
--- a/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderWildcardIT.java
+++ b/acme4j-it/src/test/java/org/shredzone/acme4j/it/pebble/OrderWildcardIT.java
@@ -125,8 +125,8 @@ public class OrderWildcardIT extends PebbleITBase {
         Certificate certificate = order.getCertificate();
         X509Certificate cert = certificate.getCertificate();
         assertThat(cert, not(nullValue()));
-        assertThat(cert.getNotAfter(), not(nullValue()));
-        assertThat(cert.getNotBefore(), not(nullValue()));
+        assertThat(cert.getNotAfter(), not(notBefore));
+        assertThat(cert.getNotBefore(), not(notAfter));
         assertThat(cert.getSubjectX500Principal().getName(), containsString("CN=" + TEST_DOMAIN));
 
         List<String> san = cert.getSubjectAlternativeNames().stream()