diff --git a/.travis.yml b/.travis.yml
index 02e35bc9..8586921a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,10 +50,11 @@ script:
   - echo "Reference bench:" $benchref
   #
   # Verify bench number against various builds
-  - make clean && make -j2 ARCH=x86-64 optimize=no debug=yes build > /dev/null && ../tests/signature.sh $benchref
-  - make clean && make -j2 ARCH=x86-32 optimize=no debug=yes build > /dev/null && ../tests/signature.sh $benchref
-  - make clean && make -j2 ARCH=x86-32 build > /dev/null && ../tests/signature.sh $benchref
-  - make clean && make -j2 ARCH=x86-64 build > /dev/null && ../tests/signature.sh $benchref
+  - export CXXFLAGS=-Werror
+  - make clean && make -j2 ARCH=x86-64 optimize=no debug=yes build && ../tests/signature.sh $benchref
+  - make clean && make -j2 ARCH=x86-32 optimize=no debug=yes build && ../tests/signature.sh $benchref
+  - make clean && make -j2 ARCH=x86-32 build && ../tests/signature.sh $benchref
+  - make clean && make -j2 ARCH=x86-64 build && ../tests/signature.sh $benchref
   #
   # Check perft and reproducible search
   - ../tests/perft.sh