diff --git a/.travis.yml b/.travis.yml
index 51aaa7bc5..7eb0afd6a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,11 +27,17 @@ matrix:
 
 # install dependencies
 install:
+  - sudo add-apt-repository -y -qq 'ppa:ubuntu-toolchain-r/test'
+  - sudo add-apt-repository -y -qq 'deb http://llvm.org/apt/precise/ llvm-toolchain-precise-3.8 main'
+  - curl http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -
   - sudo apt-get update -qq
   - if [[ "$CODE_BUILD" == "1" ]]; then sudo apt-get install -y -qq libx11-dev mesa-common-dev libgl1-mesa-dev qt5-default libqt5x11extras5-dev libxcb-keysyms1-dev gdb ; fi
   - if [[ "$DOCS_BUILD" == "1" ]]; then sudo pip install --upgrade pip setuptools ; sudo pip install Sphinx sphinx-rtd-theme ; fi
 
 script:
+  - clang-format-3.8 -i -style=file $(find pdblocate/ qrenderdoc/ renderdoc/ renderdoccmd/ renderdocshim/ -type f -regex '.*\(/3rdparty/\|/official/\|resource.h\).*' -prune -o -regex '.*\.\(c\|cpp\|h\)$' -print)
+  - git clean -f
+  - test $(git status --porcelain | wc -l) -eq 0 || { git diff; false; }
   - sh ./hash_version.sh
   - if [[ "$CODE_BUILD" == "1" ]]; then make ; fi
   - if [[ "$DOCS_BUILD" == "1" ]]; then cd docs/ && make html ; fi