diff --git a/.travis.yml b/.travis.yml
index 64a9b37..4f71a24 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -249,7 +249,7 @@ install:
 script:
   - |-
     echo "using $TOOLSET : : $TRAVIS_COMPILER ;" > ~/user-config.jam
-  - ./b2 libs/lambda2/test toolset=$TOOLSET cxxstd=$CXXSTD
+  - ./b2 libs/lambda2/test toolset=$TOOLSET cxxstd=$CXXSTD variant=debug,release
 
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