diff --git a/.travis.yml b/.travis.yml
index 71c42d0..fe1cfc2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,32 +3,18 @@
 env:
  # We use CABALVER=1.22 everywhere because it uses the flag --enable-coverage
  # instead of --enable-library-coverage used by older versions.
- - GHCVER=7.6.3  CABALVER=1.22  MONGO=2.4.14
- - GHCVER=7.8.4  CABALVER=1.22  MONGO=2.4.14
- - GHCVER=7.10.3 CABALVER=1.22  MONGO=2.4.14
- - GHCVER=8.0.2 CABALVER=1.22  MONGO=2.4.14
- - GHCVER=7.6.3  CABALVER=1.22  MONGO=2.6.12
  - GHCVER=7.8.4  CABALVER=1.22  MONGO=2.6.12
  - GHCVER=7.10.3 CABALVER=1.22  MONGO=2.6.12
- - GHCVER=8.0.2 CABALVER=1.22  MONGO=2.6.12
- - GHCVER=7.6.3  CABALVER=1.22  MONGO=3.0.12
+ - GHCVER=8.0.2 CABALVER=1.24  MONGO=2.6.12
  - GHCVER=7.8.4  CABALVER=1.22  MONGO=3.0.12
  - GHCVER=7.10.3 CABALVER=1.22  MONGO=3.0.12
- - GHCVER=8.0.2 CABALVER=1.22  MONGO=3.0.12
- - GHCVER=7.6.3  CABALVER=1.22  MONGO=3.2.6
+ - GHCVER=8.0.2 CABALVER=1.24  MONGO=3.0.12
  - GHCVER=7.8.4  CABALVER=1.22  MONGO=3.2.6
  - GHCVER=7.10.3 CABALVER=1.22  MONGO=3.2.6
- - GHCVER=8.0.2 CABALVER=1.22  MONGO=3.2.6
- - GHCVER=7.6.3  CABALVER=1.22  MONGO=3.4.3
+ - GHCVER=8.0.2 CABALVER=1.24  MONGO=3.2.6
  - GHCVER=7.8.4  CABALVER=1.22  MONGO=3.4.3
  - GHCVER=7.10.3 CABALVER=1.22  MONGO=3.4.3
- - GHCVER=8.0.2 CABALVER=1.22  MONGO=3.4.3
- - GHCVER=head   CABALVER=head  MONGO=3.4.3
-
-matrix:
-  allow_failures:
-   # The text here should match the last line above exactly.
-   - env: GHCVER=head   CABALVER=head  MONGO=3.4.3
+ - GHCVER=8.0.2 CABALVER=1.24  MONGO=3.4.3
 
 before_install:
 
@@ -39,6 +25,8 @@ before_install:
  - cabal --version
  - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927
  - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
+ - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6
+ - echo "deb http://repo.mongodb.org/apt/ubuntu precise/mongodb-org/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list
  - echo "deb http://repo.mongodb.org/apt/ubuntu precise/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list
  - echo "deb http://repo.mongodb.org/apt/ubuntu precise/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
  - echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list
diff --git a/test/TestImport.hs b/test/TestImport.hs
index ad15152..4150367 100644
--- a/test/TestImport.hs
+++ b/test/TestImport.hs
@@ -17,6 +17,7 @@ import qualified Data.Time as Time
 import Data.Time.Format (defaultTimeLocale, iso8601DateFormat)
 #else
 import System.Locale (defaultTimeLocale, iso8601DateFormat)
+import Data.Maybe (fromJust)
 #endif
 
 parseTime :: ParseTime t => String -> String -> t