diff --git a/.travis.yml b/.travis.yml
index 48c0f9b96b..bb5f03e72e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -152,7 +152,7 @@ script:
   - if [ -e bin/gcc ] ; then export PATH=$PWD/bin:$PATH ; fi ;
     COMMAND="env UBSAN_OPTIONS=print_stacktrace=1 make -C regression test" &&
     eval ${PRE_COMMAND} ${COMMAND}
-  - COMMAND="make -C unit CXX=\"$COMPILER\" CXXFLAGS=\"$FLAGS $EXTRA_CXXFLAGS\" -j2" &&
+  - COMMAND="make -C unit CXX=\"$COMPILER\" CXXFLAGS=\"-Wall -Werror -pedantic -O2 -g $EXTRA_CXXFLAGS\" -j2" &&
     eval ${PRE_COMMAND} ${COMMAND}
   - COMMAND="make -C unit test" && eval ${PRE_COMMAND} ${COMMAND}