diff --git a/.travis.yml b/.travis.yml
index d1ce2ca..cdd4b15 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -121,7 +121,8 @@ jobs:
         - COMMENT=codecov.io
         - B2_CXXSTD=11
         - B2_TOOLSET=gcc-8
-        - B2_DEFINES="define=BOOST_NO_STRESS_TEST=1, define=BOOST_EXCEPTION_DISABLE"
+        - B2_DEFINES="define=BOOST_NO_STRESS_TEST=1"
+        - B2_CXXFLAGS="-O0"
       addons: *gcc-8
       script:
         - cd $BOOST_ROOT/libs/$SELF