diff --git a/openssl/src/x509/mod.rs b/openssl/src/x509/mod.rs
index bb5743e9..649dfdc2 100644
--- a/openssl/src/x509/mod.rs
+++ b/openssl/src/x509/mod.rs
@@ -433,7 +433,8 @@ impl<'a> X509Ref<'a> {
         }
     }
 
-    /// Returns Issuer validity notAfter
+    /// Returns certificate Not Before validity period.
+    /// Requires the `x509_expiry` feature.
     #[cfg(feature = "x509_expiry")]
     pub fn not_after(&self) -> Asn1TimeRef {
         unsafe {
@@ -443,7 +444,8 @@ impl<'a> X509Ref<'a> {
         }
     }
 
-    /// Returns Issuer validity notBefore
+    /// Returns certificate Not After validity period.
+    /// Requires the `x509_expiry` feature.
     #[cfg(feature = "x509_expiry")]
     pub fn not_before(&self) -> Asn1TimeRef {
         unsafe {
diff --git a/openssl/test/run.sh b/openssl/test/run.sh
index b9481837..2c2473b1 100755
--- a/openssl/test/run.sh
+++ b/openssl/test/run.sh
@@ -4,7 +4,7 @@ set -e
 MAIN_TARGETS=https://static.rust-lang.org/dist
 
 if [ "$TEST_FEATURES" == "true" ]; then
-    FEATURES="tlsv1_2 tlsv1_1 dtlsv1 dtlsv1_2 sslv3 aes_xts aes_ctr npn alpn rfc5114 ecdh_auto pkcs5_pbkdf2_hmac x509_clone ssl_context_clone x509_generator_request hmac hmac_clone dh_from_params"
+    FEATURES="tlsv1_2 tlsv1_1 dtlsv1 dtlsv1_2 sslv3 aes_xts aes_ctr npn alpn rfc5114 ecdh_auto pkcs5_pbkdf2_hmac x509_clone ssl_context_clone x509_generator_request hmac hmac_clone dh_from_params x509_expiry"
 fi
 
 if [ "$TRAVIS_OS_NAME" != "osx" ]; then