diff --git a/.travis.yml b/.travis.yml
index 430ef75c2af1465f0fc3c3ca97dcadf6eb33caa6..48bc2ad5662e02205023fef0aeafa7fd13a1ca91 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,7 +39,7 @@ matrix:
         sources: ['ubuntu-toolchain-r-test']
         packages: [g++-4.9, valgrind]
     after_success:
-      - make check make check TEST_PREFIX="valgrind --error-exitcode=1 --leak-check=full " TEST_PATTERN=""
+      - make check TEST_PREFIX="valgrind --error-exitcode=1 --leak-check=full " TEST_PATTERN=""
 
   # cppcheck
 
@@ -68,7 +68,8 @@ matrix:
       - tar xf lcov_1.11.orig.tar.gz
       - sudo make -C lcov-1.11/ install
       - gem install coveralls-lcov
-    after_success:
+      - pip install --user cpp-coveralls
+     after_success:
       - make clean
       - CXXFLAGS="--coverage -g -O0" CPPFLAGS="-DNDEBUG" make check
       - coveralls --build-root test --exclude src/catch.hpp --exclude src/unit-algorithms.cpp --exclude src/unit-allocator.cpp --exclude src/unit-capacity.cpp --exclude src/unit-class_const_iterator.cpp --exclude src/unit-class_iterator.cpp --exclude src/unit-class_lexer.cpp --exclude src/unit-class_parser.cpp --exclude src/unit-comparison.cpp --exclude src/unit-concepts.cpp --exclude src/unit-constructor1.cpp --exclude src/unit-constructor2.cpp --exclude src/unit-convenience.cpp --exclude src/unit-conversions.cpp --exclude src/unit-deserialization.cpp --exclude src/unit-element_access1.cpp --exclude src/unit-element_access2.cpp --exclude src/unit-inspection.cpp --exclude src/unit-iterator_wrapper.cpp --exclude src/unit-iterators1.cpp --exclude src/unit-iterators2.cpp --exclude src/unit-json_patch.cpp --exclude src/unit-json_pointer.cpp --exclude src/unit-modifiers.cpp --exclude src/unit-pointer_access.cpp --exclude src/unit-readme.cpp --exclude src/unit-reference_access.cpp --exclude src/unit-regression.cpp --exclude src/unit-serialization.cpp --exclude src/unit-testsuites.cpp --exclude src/unit-unicode.cpp --include ../src/json.hpp --gcov-options '\-lp' --gcov 'gcov-4.9'
@@ -186,6 +187,10 @@ matrix:
     env: LLVM_VERSION=3.8.1
     compiler: clang
 
+  - os: linux
+    env: LLVM_VERSION=3.9.0
+    compiler: clang
+
 #####################
 # installation step #
 #####################
@@ -200,6 +205,7 @@ cache:
     - ${TRAVIS_BUILD_DIR}/deps/llvm-3.7.1
     - ${TRAVIS_BUILD_DIR}/deps/llvm-3.8.0
     - ${TRAVIS_BUILD_DIR}/deps/llvm-3.8.1
+    - ${TRAVIS_BUILD_DIR}/deps/llvm-3.9.0
 
 
 install: