diff --git a/.travis.yml b/.travis.yml
index 9f929acf6cb..fbd3915b515 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,8 @@ matrix:
             - libubsan0
       before_install:
         - mkdir bin ; ln -s /usr/bin/gcc-5 bin/gcc
-      env: COMPILER=g++-5 SAN_FLAGS="-fsanitize=undefined -fno-sanitize-recover -fno-omit-frame-pointer"
+      # env: COMPILER=g++-5 SAN_FLAGS="-fsanitize=undefined -fno-sanitize-recover -fno-omit-frame-pointer"
+      env: COMPILER=g++-5
     - os: linux
       compiler: clang
       addons:
@@ -30,7 +31,8 @@ matrix:
             - libubsan0
       before_install:
         - mkdir bin ; ln -s /usr/bin/clang-3.7 bin/gcc
-      env: COMPILER=clang++-3.7 SAN_FLAGS="-fsanitize=undefined -fno-sanitize-recover=undefined,integer -fno-omit-frame-pointer"
+      # env: COMPILER=clang++-3.7 SAN_FLAGS="-fsanitize=undefined -fno-sanitize-recover=undefined,integer -fno-omit-frame-pointer"
+      env: COMPILER=clang++-3.7
     - os: osx
       compiler: gcc
       env: COMPILER=g++
@@ -43,6 +45,6 @@ matrix:
 script:
   - if [ -L bin/gcc ] ; then export PATH=$PWD/bin:$PATH ; fi ;
     make -C src minisat2-download &&
-    make -C src LIBS=-lubsan CXX=$COMPILER CXXFLAGS="$SAN_FLAGS -Wall -O2 -g -Werror -Wno-deprecated-register -pedantic -Wno-sign-compare" -j2 &&
+    make -C src CXX=$COMPILER CXXFLAGS="-Wall -O2 -g -Werror -Wno-deprecated-register -pedantic -Wno-sign-compare" -j2 &&
     env UBSAN_OPTIONS=print_stacktrace=1 make -C regression test &&
     make -C src CXX=$COMPILER CXXFLAGS=$FLAGS -j2 aa-symex.dir cegis.dir clobber.dir memory-models.dir musketeer.dir