diff --git a/.travis.yml b/.travis.yml
index cc79cf5..06b2d75 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,8 +36,7 @@ matrix:
     env: COMPILER_VERSION=4.9 BUILD_TYPE=Release
   - addons: *1
     compiler: clang
-    env: COMPILER_VERSION=3.7 BUILD_TYPE=Debug CFLAGS="-O0 --coverage" CXXFLAGS="-O0
-      --coverage" REPORT_COVERAGE=1
+    env: COMPILER_VERSION=3.7 BUILD_TYPE=Debug
 before_install:
 - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew upgrade; fi
 - if [ -n "$REPORT_COVERAGE" ]; then sudo apt-get update python; fi