diff --git a/.travis.yml b/.travis.yml
index 6712498d..d7a24fd1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,25 +3,8 @@ language: haskell
 ghc:
   - 7.8
 
-before_install:
-  - cabal update
-  - cabal sandbox init
-
-install:
-  - cabal install --only-dependencies --enable-tests
-
 script:
-  - cabal configure --enable-tests --enable-library-coverage && cabal build && cabal test
-  - cabal check
-  - cabal sdist
-
-after_script:
-  - |
-    if [ "$TRAVIS_PULL_REQUEST" -eq "$TRAVIS_PULL_REQUEST" ] 2>/dev/null || [ "$TRAVIS_BRANCH" == "master" ] ; then
-      cabal install hpc-coveralls
-      hpc-coveralls --exclude-dir=test spec doctests
-    fi
-
+  - ./scripts/test-all.sh
 
 notifications:
   irc:
diff --git a/scripts/test-all.sh b/scripts/test-all.sh
new file mode 100755
index 00000000..990d3a1c
--- /dev/null
+++ b/scripts/test-all.sh
@@ -0,0 +1,42 @@
+#!/bin/bash -
+#===============================================================================
+#
+#          FILE: test-all.sh
+#
+#         USAGE: ./test-all.sh
+#
+#   DESCRIPTION: Run tests for all source directories listed in $SOURCES.
+#                Uses local versions of those sources.
+#
+#===============================================================================
+
+set -o nounset
+set -o errexit
+
+SOURCES=( servant servant-server servant-client servant-jquery servant-docs )
+GHC_FLAGS="-Werror"
+
+prepare_sandbox () {
+    cabal sandbox init
+    for s in ${SOURCES[@]} ; do
+        cd "$s"
+        cabal sandbox init --sandbox=../
+        cabal sandbox add-source .
+        cd ..
+    done
+}
+
+test_each () {
+    for s in ${SOURCES[@]} ; do
+        echo "Testing $s..."
+        cd "$s"
+        cabal install --only-dependencies --enable-tests
+        cabal configure --enable-tests --ghc-options="$GHC_FLAGS"
+        cabal build
+        cabal test
+        cd ..
+    done
+}
+
+prepare_sandbox
+test_each