diff --git a/snap-server.cabal b/snap-server.cabal
--- a/snap-server.cabal
+++ b/snap-server.cabal
@@ -1,5 +1,5 @@
 name:           snap-server
-version:        0.5.1.2
+version:        0.5.1.3
 synopsis:       A fast, iteratee-based, epoll-enabled web server for the Snap Framework
 description:
   Snap is a simple and fast web development framework and server written in
diff --git a/test/snap-server-testsuite.cabal b/test/snap-server-testsuite.cabal
--- a/test/snap-server-testsuite.cabal
+++ b/test/snap-server-testsuite.cabal
@@ -53,6 +53,7 @@
     test-framework-quickcheck2 >= 0.2.6 && < 0.3,
     text >= 0.11 && <0.12,
     time,
+    tls >= 0.7.1 && <0.8,
     transformers,
     vector >= 0.7 && <0.8,
     vector-algorithms >= 0.4 && <0.5,
@@ -232,4 +233,5 @@
     base >= 4 && < 5,
     network == 2.3.*,
     http-enumerator >= 0.6.5.4 && <0.7,
+    tls >= 0.7.1 && <0.8,
     criterion >= 0.5 && <0.6
diff --git a/test/suite/Test/Blackbox.hs b/test/suite/Test/Blackbox.hs
--- a/test/suite/Test/Blackbox.hs
+++ b/test/suite/Test/Blackbox.hs
@@ -21,6 +21,7 @@
 import           Data.Monoid
 import qualified Network.HTTP.Enumerator as HTTP
 import qualified Network.Socket.ByteString as N
+import           Network.TLS (TLSCertificateUsage(..))
 import           Prelude hiding (catch, take)
 import           System.Timeout
 import           Test.Framework
@@ -372,7 +373,7 @@
 parseURL :: String -> IO (HTTP.Request IO)
 parseURL url = do
     req <- HTTP.parseUrl url
-    return $ req { HTTP.checkCerts = const $ return True }
+    return $ req { HTTP.checkCerts = const $ return CertificateUsageAccept }
 
 
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